V -b:/ /0of the various methods in recognizing these features. e. Modelling of gravity and magnetic...

V- r 1, I , .�� .

�-Vf;] R�1,oid F"J;�

- -

�-b:/ /0

W�.! P�c' _____- DocRe� No. _____

P Li �I f);)OWM DOCKET CONTROLCENTER

Department of EnergyChicago Operations Office '85Salt Repository Project Office505 King AvenueColumbus, Ohio 43201-2693Commercial (614) 424-5916F.T.S. 976-5916

DEC 23 P4:33

fl i 2 -.LJ. H JUL 0:

_______________________/ - *2.��ii7A�A7�/ '')

(Rotum to W:�A, 623-22) � __A-4

&

December 16, 1985

John J. Linehan, Section LeaderSalt SectionRepository Projects BranchDivision of Waste Management, MS 623-SSU.S. Nuclear Regulatory CommissionWashington, D.C. 20555

Dear Mr. Linehan:

SUBJECT: SRP/NRC WORKSHOP

On November 19-21, 1985, the Salt Repository Project (SRP) and the NuclearRegulatory Commission (NRC) held a workshop on the structure and tectonics ofthe Palo Duro Basin. Attached for your information are the observations ofthat meeting prepared by SRP and NRC, along with copies of all presentationmaterials.

Questions regarding these materials, and the meeting in general, can bedirected to Mike Ferrigan or Toni Baillieul of my staff.

Sincerely,

k

SRPO: TAB:max:0343C

J.O. Neff v kProgram ManagerSalt Repository Project Office

Attachment: Signed notes of meeting onStructure and Tectonics ofthe Palo Duro Basin

cc: J. Van Vliet, ONWIH. Latham, ONWI

GS# 087-86

860-1-1-6--P&I d008 -- --'4N-16W§-rEt -'-514�46

I

as + o~~~~~~~~~f ,,r. 1B9i 6./o i it+ m - c

SUMMARY OF NRC/DOE MEETINGON THE

STRUCTURE AND TECTONICS OF THE PALO DURO BASIN

Date/LocationNovember 18-21, 1985Park University HotelColumbus, OH

Attendees/Organizational AffiliationA list of attendees and their organizational affiliations is attached asEnclosure 1.

Background/FactsThe meeting agenda (Enclosure 2) gives the meeting objectives and the topicsdiscussed and the name and affiliation of the presenters. Enclosure 3consists of all of the handouts and copies of the viewgraphs presented; eachpackage is identified by the person making the presentation and a number whichis shown on Enclosure 2. During the course of the meeting proprietary and DOEaquired seismic reflection data were made available for review. Enclosure 4lists which portions of this dataf2e"Viewed by NRC staff and contractors.

Observations

The NRC had the following observations:

1. A significant amount of data available for structural interpretations ofthe Palo Duro Basin consists of boring logs of oil exploration wells andseismic surveys conducted for oil exploration. As part of site screeningactivities of the entire basin, project specific seismic data wereobtained utilizing acquisition parameters which emphasize resolution inthe approximate 2000 to 6000 ft. depth range. As such, the inherentuncertainty and limitations of these data for detailed structural analysisare recognized particularly with respect to near-surface strata.

2. The nature and distribution of the seismic and boring data are such thatsome variations in interpretations are possible for both the data and theresultant structural features.

3. Some available seismic data and remote sensing imagery, such as landsatand aerial photographs, do not appear to have been fully utilized. Mluchseismic data are proprietary in nature, and when approached by DOEcontractors, the oil companies have refused to release the data. Otherseismic data are known by DOE to be available from brokers; however, thequality and usefulness of this data is not well known. DOE shouldconsider evaluating the availability and usefulness of all seismic data todetermine if they can be obtained and if they are worth obtaining toassist in structural interpretations. It should be recognized that NRChas defined procedures for dealing with proprietary data. DOE may alsowish to consider obtaining and evaluating other available remote sensingdata such as various types and scales of aerial photography and radarimagery.

Summary of NRC/DOE MeetingPage 2

4. In the development of their site characterization plans DOE shouldconsider developing a comprehensive integration of the available data.The following data elements have been addressed to some degree; however,NRC considers the integration effort should include:

a. Development of a conceptual regional tectonic model(s) to evaluatevarious structural interpretations.

b. Evaluations of the possible effects of strike-slip faulting includingboth the ability to recognize such features and their effect onstructural interpretations.

c. Evaluations of the role of the Mtatador Arch and Oldham Nose in theregional tectonic setting.

d. Evaluations of the relationship between fracture patterns observed inboreholes, outcrops, and remote sensing data including the limitationsof the various methods in recognizing these features.

e. Modelling of gravity and magnetic data.

f. Evaluations of potential reactivation of structural features throughgeologic time including the upward change in structural expressionsuch as progression from faulting to folding to fracturing which maybe expected and variations in fracture density and orientations overareas of deep faults in comparison with unfaulted areas.

g. Providing more emphasis on evaluating the presence or absence of foldsand their role in the tectonic history of the area.

h. Resolving difficulties in identifying basement.

i. Reevaluation of the boundaries and the resultant effect of theregional stress field between the approximately N 700 E maximumhorizontal stress field of the mid continent to the approximately N-Sstress field of the Rio Grande rift.

5. It appears that DOE's contractors have made significant progress indeveloping and implementing a viable QA program; however, NRC questions iftraceability of information from study to study can yet be demonstrated.From the meeting presentations, it is NRC's impression that each study isproviding some checks and documentation; however, there appears to belittle to no effort to cross-check from one study to another. Examplesthat arose during the meeting include: criteria used to identify faultson seismic lines, criteria used to eliminate or modify faults presented inthe published literature and subcontractor reports and criteria to selectstratigraphic "picks" from borehole logs. DOE may wish to have its QApersonnel consider this concern.


6. When planning for seismic reflection surveys NRC believes that:

a. Expanded coverage with seismic refraction profiling may provide muchuseful information concerning lateral and vertical variations ofvelocity values. Such information could be useful for 1) drill holelocation optimization, 2) geohydrology characterization, and 3)planning of seismic reflections lines and evaluation of shallowreflection anomalies.

b. Dual programs may be desirable in certain areas to provide bothshallow and deep structural data.

c. Shallow (less than 2000 feet) surveys should he considered in selectedareas where the Alibates Fm is known to be faulted.

7. DOE should consider the usefulness and applicability of electrical andelectromagnetic surveys in resolving structural and geohydrologicconcerns.

8. Based on the DOE presentations of general types of planned sitecharacterization studies, it appears to the NRC that current planning isfocusing on developing site specific studies. It is not as apparent thatthe same attention has been given to also developing regionalinvestigations important to understanding site performance. Duringfuture meetings in which proposed studies are discussed this subjectneeds additional clarification. This subject should be evaluated inlight of the performance objectives of 10 CFR 60.

9. The NRC staff appreciates the effort of DOE in making available at thismeeting the key personnel involved in the structural evaluation of thePalo Duro Basin. The knowledge and candor of the presenters helpedassure the success of the meeting in accomplishing its objectives. TheNRC staff wishes to thank all DOE participants for their effort.

The DOE had the following observations:

1. A common data base has been available to all SRP investigators for use instructural and stratigraphic interpretation; each study has utilizedselected portions of the data base. The regional nature of the currentlyavailable borehole information and seismic surveys permit conflictingstructural interpretations.

2. SRP recognizes a need to develop a uniform approach to evaluation andinterpretation of geotechnical data (i.e., criteria for (1) pickingformation "tops" from geophysical logs, (2) picking faults on Palo Duroseismic sections, (3) assigning geologic horizons to seismic data, and(4) "time to depth" conversions.)


3. It is important to obtain seismic data optimized for both basementstructure and shallow structures (repository horizon and above). Thesetwo needs lead to conflicting requirements for data acquisitionparameters if a single seismic survey is to be used. Considerationshould be given to separate surveys for deep and shallow data.

4. The exploration geophysics industry (particularly seismic), is needed bythe program because of their expertise, capital equipment, and software.However, the industry's procedures and software are largely proprietaryand do not fully comply with the program's general requirements for QA.Nor can the industry be expected to comply by revealing their proprietaryprograms. Some agreement between NRC and SRP is desirable before sitecharacterization activities to identify the acceptable applications ofindustry data.

5. The uncertainty in structural maps should be explicitly stated ratherthan relying solely on the indicated distribution of data points tosuggest areas of greater or lesser control.

6. DOE needs to resolve the level of detail needed in structural tectonicmodels necessary at different phases prior of pre-licensing studies.Specifically, the interpretation of structures within the tectonicframework and the evaluation of performance objectives must be related touncertainties inherent in the model.

7. There is the need to clearly define the implications to site performanceof tectonism during various geologic periods.

8. Site studies require integration to achieve consistent conceptual modelsof geology, structure, and hydrology (e.g., structural control ofgeomorphic processes and depositional patterns, and interrelationship ofthe geologic framework to hydrogeologic processes.

9. Available remote sensing data have not been utilized and completelyevaluated.

10. This meeting demonstrates the desireability of early technicalinterchanges between DOE and NRC to discuss existing data anduncertainties in interpretations. Such discussions are valuable toexpedite the later review of the SCP.

11. It was noted that relatively little information exists concerning theDockum Formation across the entire panhandle. Some approaches toenhancing our understanding of this unit include geological andstructural mapping in areas of exposure (e.g., Canadian River Valley),and shallow reflection/refraction seismic surveys.


12. With the exception of Fracture Identification Logs, Joint information iscurrently restricted to the periphery of the Southern High Plains.Considerable discussion centered on the implication and meaning ofFracture Identification Logs relative to regional structuralinterpretations. The nature of the data sets does not permit unambiguousconclusions.

The representative of the Texas Water Commission and the State of Utah did notmake observations for the record.

AGREEMENTS/OPEN ITEMS

1. Both parties agree to provide a response to suggestions presented by eachother in this set of meeting notes.

2. DOE expressed concern over the QA requirements necessary to validate andverify proprietary procedures utilized for geophysical data acquisitionand processing by the exploration industry. It was agreed to bring thisconcern to the attention of the NRC OA staff for eventual resolution.

3. DOE offered to make available to NRC existing computer listings of theSWEC borehole data base. NRC would like to receive this listing to helpin identifying specific borehole information that might be requested forfuture review.

4. DOE will provide NRC with 10 paper copies of the 35mm slides presentedduring the meeting and correlate them to the speakers name and numbershown on the agenda (Enclosure 2).

5. SRPO and ONWI summarized site characterization studies described inChapter 4 of the final EA. These summaries indicated numerous geologic,hydrogeologic, and geophysical studies that may be initiated andconducted before SCP release. Both NRC and SRPO agree that consultationwill be needed before these studies begin. In order to support mutualplanning for SRPO/NRC interactions NRC would like to receive from SRPO anidentification of pre-SCP activities and related milestones and schedules.

Thomas A. Baillieul, US DOE/SRPO/

Robert L. Johr on, NRC/WMRP P. Michael Ferrigan,/ S DOE/SRPO

0240C

Enr'dos&Ae & 4

AgendaJoint NRC/SRP Workshop

November 19-21, 1985, Parke University Hotel, Columbus, Ohio

STRUCTURE AND TECTONICS OF THE PALO DURO BASIN

Objective: Participants at this workshop will obtain an understanding of thecurrent state of knowledge of the structural features of the PaloDuro Basin. The focus will be on evaluating the presentstructural configuration of the basin and its tectonic history andsetting. Current seismicity and active tectonic processes in theregion will not be discussed.

The data base from which structural interpretationswill be examined. The workshop will identify areascontractor interpretations of existing data differ,methods to resolve those differences.

have been madewhereand consider

November 19, 1985

8:30 - 9:00 INTRODUCTIONS

9:00 - 10:00 OVERVIEW OF THE PALO DURO BASIN SRPO, NRC

- Current basis for definition andtectonic history.

J. Peck (SWEC) 0I)R. 8 E )(nK (Ts") CI)

10:00 - 12:00 DESCRIPTION OF DATA USED IN SRP'sSTRUCTURAL STUDIES

- Seismic Lines. Includes: location ofDOE-run and purchased lines, thequality of the data (resolution atdepths of interest), the rationalefor selection of specific lines, andthe proprietary status of theinformation.

- Types of processing of seismicinformation, including reasons forselecting specific processingtechniques.

Other geophysical data (gravity,aeromagnetic) used todefine structures.

H. Acharya (SWEC) (3)

G.J. Long (G.J. Long)Q4R. Budnik (TBEG) (C)D. Turner (ONWI) (C.)

TBD (SVIEC)W. Bennett (Bendix) y7)

12:00 - 1:00 --- LUNCH ---

1:00 - 5:00 - Non-DOE wells. Includes: number andlocation of wells, lithologic andgeophysical logs available, qualityof the data, rationale for selectionof wells to be included in the database, and availability of the datafor review by third parties.

P. Murphy (SWEC) (?)

Summary of the borehole database.

- DOE Wells. Includes: lithologiclogs and geophysical logs available,stratigraphic correlations made, andapplication of well information toother studies (e.g. use of soniclogs to establish parameters forseismic processing).

- Remote-sensed Imagery. Includes:types of imagery analyzed, applica-tion of remote-sensing to structuralinterpretation (e.g. lineamentanalysis), and "ground checking"of interpreted features.

- Geologic Analysis.Includes: field mapping, joint/fracture analysis (outcrop and bore-hole), relation of mapped featuresto regional structures, (includingrecent interpretations of Pleistoceneunits).

- Quality Assurance. Procedures for datacollection/interpretation of seismic,borehole, and other data applicableto structural analyses.

P. Murphy (SWEC)

J. Peck (SWEC) (CA)

T. Gustavson (TBEG)(Ito

P. as11CJlcPi (SWIEC)R. reck (S1'EC)E. Collins (TBEG)T. Cu tavzon (TBa )D. P 1 eVc

Detailed Correlations. This will be abrief synopsis of material presentedat the August 5-9 workshop in question.

T. Gustavson Aft)

11:00 - 12:00 PARTS OF THE AVAILABLE DATA BASE NOTUTILIZED AND RATIONALE FOR EXCLUSION

- Summary of all available boreholeand proprietary geophysical dataand selection criteria for accessby the program.

- Summary of available literature sourcesfor structural interpretations of thePalo Duro Basin.

E. Washer (SWEC)

E.E.R.

Washer (SWEC)Bingler (TBEG)Budnik (TBEG)

12:00 - 1:00 --- LUNCH ---

1:00 - 5:00 INTERPRETATIONS OF THE STRUCTURAL GEOLOGYDATA BASE

- Computer mapping abilities from geologicdata base.

- Methods/Procedures for interpretingseismic data.

_ M *LCYtQ. Li CAeSu.RM-A~- Extent to which available data (bore-t hole stratigraphic information,j surface mapping, seismic information

published studies) has been integratedinto a structural interpretation.

T. Bruno (SWEC) Oct'

G.J. Long (G.J. Long)LjiR. Budnik (TBEG)4,j)'D- Twvr-n4(ONsz} (kwR. Budnik (TBEG)T. Gustavson (TBEG)P. Murphy (SWEC)J. Peck (SWEC)T. Regan (SWEC)

TBD (TBEG)D. Pierce (SWEC)

Effects of differing data interpreta-tions or different data bases onstructure/tectonic evaluations of thePalo Duro Basin, including methods,data base and results.

November

8:30 -

l985

SUMMARY AND CONCLUSIONS

- General types of additional studiesnecessary to resolve differing structuralinterpretations/hypotheses.

Al 1'D.C~tt4s (t o)

0

- Meeting summary and agreements. SRPO, NRC

- in b 4

Page 4

EXPECTED ATTENDEES

SRPO ONWI SWEC TBEG NRC

J.T.M.A.

SherwinBaill ieulFerriganAvel

W.J.A.D.0.C.D.S.S.K.

NewcombHilemanFunkBallmanSwansonKuntzTurnerAdamsNelsonJohnson

J. PeckE. WasherD. PierceP. MurphyT. ReganH. AcharyaT. BrunoG.J. Long *

E.J.T.R.E.S.C.

Bingler J. TrappRaney R. JohnsonGustavson P. JustusBudnik M. BlackfordCollins A. IbrahimHovorka R. LeeKreitler F. Ross

E. ZurfluehJ. Pearring

ALMS r t E. Levine **YV. Murphy **D. Carpenter ***H. Mckaque ***R. BerryC. Purcell ***

BENDIX

W. Bennett

* (G.J. Long & Associates)** (Weston Geophysical)*** (LLL)

0002C

ENCLOSURE 3

t I (,tcA c C).. . w. �. -I W_

REGIONAL TECTONIC MAP "-LEGEND

--- PERMIAN BASIN

1050I I I I

1000I I I I I I I I I

40°-

35 -

-ftftmw-, an an wmwm�omm

0

1

0

A�' "***.N

Pr* ) --

hkk)

30 -

REGIONAL TECTONIC FEATURES

o 25 Go

SCALE-MILES

0 50 100L I I

SCALE-KILOMETERS

5-44,009I

PENNSYLVANIAN DELTAS

OKLAHOMA LEGEND

EXPOSED HIGHLANDS

DELTA LOBES

- DIRECTION OFTRANSPORT

-0-- Fs, 'taOMl4ted F-'0l GOODO".Cal Wanl LOO Dvat

IUMDIIIV f Dt""A ,on Al.10 r1.4401 Ale"of mft.mw ODoaw. OBaowe.*Mt

+-. .4e F"lIt Iftim.Too toy Lon.01 IMS lU-lJotnrMw. 00.o-'lrn mnAfro.$ 1 .OglC*I Ale 01 MAe,-1fM 00eef1e D-Soec..".fl

- -4.-Slret.c:. C401lO..,ne.1e SWPol

* W0II Comf110

Well1 Pact e*fslfran1 Wrecamblaft,~

hat Use to CwAMtrn 69aeftmoft thowfillot

a % 10 is

a 6 la I to ~~

WELL LOG SUITE

Description

Gamma Ray LogCaliper Log (4-Arm)Spontaneous Potential Log (fresh water mud only)Dual Induction Electric Log (fresh water mud only) orDual Laterolog (salt mud only)Microresistivity LogBorehole Compensated Sonic Velocity Log

Sonic Waveform-Integrated Travel TimeDigitized Waveform

Long Spaced Sonic LogSonic WaveformDigitized Waveform

Well Seismic LogDensity Log with photoelectric absorption curveGamma Ray Spectrometry LogCompensated Neutron LogHigh Resolution Continuous Dipmeter Logs (including fracture

identification, continuous directional survey, and arrowplots)

Continuous Directional SurveyElectromagnetic Propagation LogTemperature LogRepeat Formation Tester (run separately at selected intervals)Thermal Decay TimeDigital Sonic Log

Synthetic logs derived from computer processing-of the abovewill be obtained to provide calculated information onpc-osity/permeability and mechanical properties.

logsrock

A Cement Bond Log, Variable Density Log, and Casing Potential Logwill be run within the cased portion of the well. A Gamma RayLog and Casing Collar Locator log will be run simultaneously withthese logs for depth control and correlation with the logs run inthe open hole.

As required, a partial c ite of logs will be performed toidentify potentially porous zones, and to locate good packerseats prior to running drill stem tests. This partial suite willconsist of:

Gamma Ray LogCompensated Neutron LogDual Induction or Dual Laterolog4-Arm Caliper Log

9

IeOar Or

* O~0L 0 HA M\/:mutI P T [---I--1 1~~~~~~~~~~~~~~~~

… TF MIHIow CUMAR S RjONG

---- - --- ---------- L04.. I 1.9e

N.. hs,.e~~~~~

N' -

0

Ii

z

M.* -

II II- -tI

i

IS A aM1E II

L 4 114 I K A N 0IY'A L I~~.bQ .01~as 11A.

a ft I 04

...... ... I U ~ I Z A i p

II1.3 A

1 I~~~~~~~~~~t o l

L A M A L

LEGEND

P9WtS PRNGGAl TtSt WflLS

-#SW RfrtttCfr MUY te1a2l---- PUCHASED IPlP"If TARY StSop DATAo WELLS WITH VELOCITY SupVcvSA NWTS TESTING I" WILDCAT WILL

O go to

SCALE -MItS

0 20 w

SCALE -KILOMEtE5

IfWTS PROGRAM TEST WELL ANDSEISMIC COVERAGE OF CENTRALPALO DURO BASIN

B A I L E Y

- ~ J, . ~ . . ---- --. --- .

IWX III,

I

L.O.41,11

0 N

took

aa-1-1

R M

0 E T Hc:p laws

-R AJ/

lia" Kk IftP aS T C.7 R 0

I

404.4

or it.loth PW

B A I L E A M sopm do

F 0com" ybp6w.

?boo &.Was cms

lkpI.k Wo

EXPLANATION:

AREAS Of STUDY

PROPOSED SITES

0 10 to

SCALE -MTILES

0 20 40

SCALE -KROMETERS

AP 13697-23-ATTACHMENT ILOCATION OF AREAS OF STUD0STONE E. WEMSER ENGINERIN COPOA

-

AP 13697-36-0ATTACHMENT- 2

1Bri- i>

GEOLOGIC MAPPINGPOTTER COUNTY FAULT AREA

AP 13697-36-0ATTAC HM ENT-3° -- 71X° ° /-v

GEOLOGIC MAPPINGPUNTA de AQUA CREEK ANDBILLYS CREEK AREA

-

AP 13697-36-0ATTA C H M E N T- 4

/ I /~~~ I

GEOLOGIC MAPPINGt DRIPPING SPRINGS CREEK AREA

AP 13697-36-0* ATTACHMENT-5

* 4OE3~~~~~~~~ -4-,- ~~~~~~~~~%f -- r--4-4 -4~~~~~~~~~~~~ftch

-F I

Otis~~~~~1

d wi m

**, IRŽ.

. "k ____ ;� z_� 711� ` 111I F, - 7%bRK"k , 0

OV�S� _ �- z -0 N - , 7 I A I

I / I'd LA�--lio-uw - I -- L.,�) ! � : QL T!-[ '

o'9ZC -c CURR~~~~~~~~~~COUNTma

In

- -! -g t t - 160 16

J$a gi'.5

~,TR .1> t 5 b kcolGEOLOGIC MAPPING

K I 'c 1

B304Adr i ? -L

Structural geology and tectonic history of the Palo Duro Basin and adjoining areas.

1. Introduction

The structural geology and tectonic history of the Palo Duro Basin is closelyrelated to that of the adjoining areas. Therefore, to fully understand the structuraldevelopment of the Palo Duro Basin it has been necessary to examine the historyof deformation of not only of the basin and adjoining areas, but the entire regionas well.

11. Structural geology of areas marginal to the Palo Duro Basin.

A. Amarillo Uplift -- a major positive structural element of the Ancestral RockyMountains; has been internally deformed into a series of horsts and grabens;

B. Whittenburg Trough -- deep pull-apart graben along south side of AmarilloUplift:

C. Oldham-Harmon structural trend -- northwest-trending series of en echelonbasement blocks that lie along the northern margin of the Palo Duro Basin:

D. Matador Arch -- east-west trending series of en echelon basement blocks thatseparate the Palo Duro and Midland Basins;

E. Roosevelt positive -- broad positive area that separates the Palo Duro andTucumcari Basins.

111. Structural geology of the Palo Duro Basin.

A. The Palo Duro Basin is a structural low that occupies the southern part of theTexas Panhandle. It was a discrete depositional basin only during the LatePennsylvanian.

B. Deformation appears to decrease southward from the Oldham-Harmon trend:

C. Structures within the basin are generally isolated positives and poorly definedlows:

1) Castro Trough -- northwest-trending low extending from Swisher County toDeaf Smith County:

2) Central Randall positive -- fault-bounded structure that probably typifiesstructures within the basin:

3) Deaf Smith County -- poor control, but there appear to be northwest- andnortheast-trending faults.

D. Dominent structural grain is northwest-southeast, although northeast-southwesttrending structures are locally important.

IV. Tectonic history of the Palo Duro Basin and surrounding region.

A. Tectonic history of the basin was defined using structural and stratigraphicdata: information for the surrounding areas came primarily from published sources.

B. Deformation has been episodic: timing coincident with deformation of adjoiningareas to east and west:

1. Proterozoic -- volcanism (1400 Ma). primarily rhyolite with related granite.similar rocks extend northeastward to Missouri.

2. Cambrian -- rifting associated with opening of the Southern OklahomaAulacogen.

3. Cambrian to Early Devonian -- carbonate shelf.

4. Middle Devonian -- folding of the Texas Arch and Anadarko Basin: formationof regional unconformity.

5. Mississippian -- carbonate shelf.

6. Pennsylvanian -- Ancestral Rocky Mountain orogeny. formation of Palo Durodepositional basin: 75 miles left-lateral strike-slip faulting along Amarillo Uplift.

7. Permian -- regional subsidence associated with formation of the PermianBasin. transition from normal marine to restricted depositional conditions duringEarly Permian.

8. Triassic -- non-marine deposition during subsidence that was possiblyassociated with rifting in Gulf of Mexico.

9. Cretaceous -- very shallow marine to non-marine environments. No evidence ofLaramide deformation.

10. Tertiary -- reactivation of basement structures during deposition of theOgallala Formation in Late Miocene. coincident with Basin and Range deformationto the west.

11. Quaternary -- tectonic activity along Amarillo-Wichita Uplift, as indicated byseismicity in Whittenburg Trough: movement along Meers Fault in Oklahoma.

Impp-- I

NM.:! TEXAS HIGN aLAINS CANYON LANOS7

5 / _ O~~allolo-.Formot~~on : . . F R E RE BED PLAINS

as _ 2~~_s > _ DOCKUM GROUP __-R~_-

= ss= SHALE

= ANHYDRITE

E SALT

3 DOLOMITESCAL

E±i~ LIMESTONE 0 50 ues

777, IGNEOUS

Figure 7. Schematic east-west section across Palo Duro Basin, Texas Panhandle.

N DALHART BASIN PALO OURO BASIN S

DOKUM-.GROUP-

E\ -IDOLOMITE

EII3 LIMESTONE

= IGNEOUS

= ANHYDRITE

E SALT

=va SANDSTONE

= SHALE0 SCALE 50

Basin, Amarillo Uplift, PaloFigure 8. Schematic north-south section across DalhartDuro Basin, and Matador Arch, Texas Panhandle.

13

-

Palo Duro Basin DoIthort Basin7 4

General Litholoqyand

depositional settingSYSTEM SERIES GROUP FORMATION FORMATIONHOLOCENE alluvium, dune sand alluvium, dune sandHOLOCENE___ Playa Plaza

OUATERNARY TahokaPLEISTOCENE cover sands' cover sands' Lacustrine closIicsTW Tuie Playa" 'Playa' and windblown deposits

Bianco

TERTIARY NEOGENE Ogallala Oglolan Fluvnei arid-_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ._ _ _ _ . _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ I_ l c u s tr in e c l a s ic s

CRETACEOUS unditferentiated undifferentiated Marine shales_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ a n d l i m e s t o l e

TRIASSIC DOCKUMt Fluviol-delloic andTRIASSIC _ _ C__ M Icustrine clastics

Dewey Lake Dewey Lake

OCHOA Alibotes Alibates

Salodo/Tansill

YatesCL ARTESIA ~~~~~~Artesia Group

0. ARTESIA Seven Rivers undifferenliated

Oueen/Grayburq

zt _ ~~~~~~~~~~~~~~~Sobksho sail,Z a~~~~~~~~~~~~~~~~~~~~~nhydrite red beds,

Son Andres Blaine and peritidoldolomite

wj Glorieta Glorieto

Upper Clear Fork Clear ForkCt CLEAR

Z f ORK Tubb

is Lower Clear Fork undifferentiated

Tubb-WichitaRed Cove Red Beds

WICHITA

WOLF CAMP

VIRGIL CISCOZ ~~~~~~~~~~~~~~~~~~~~~~Shelf atnd

MISSOURI CANYON shelf-morgin_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _C a r b o n a t e .

bosinal shale.MOIES 5TRAWN and deltaic

(n ~ ATKAsandstoneZ ATOIYALj BEND

MORROW

,L CHESTER0 ~ ~ ERMCShelf carbonate

va z MERAMEC and chern

OSAGE

OROOVICIAN ELLEN- Shelf dolomite_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ B U R G E R _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

CAMBlRIAN ? Shallow marine(?)sandstone

PRECAMBRIAN Igneous and_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ m e t a m o r p h i c

Figure 26. Stratigraphic column and general lithology of theBasins. After Handford and Dutton (1980).

Palo Duro and Dalhart

56

.^ I # s .S I"' " 9 ^''1 % ' "'-S- -n- >-'i {, . ^ j

t | 6 t *- | t tj s_ *t sst iRg-Jid *18 # s sj / %S;';-- Jo; *_ |

,.15.t

64 /J1~~~~~~~~~~~~O ~~-J.ROBERTS HE~MPRILC

xING

Ai~

Li

F

1,. i- '------4

STOICrURE CONTOUR KAR ON TOP OF CRYSTALIN~E BASE(mIr

O ~~~~ ~~~4r m i* 0 ~~~~40gm* .~~~.l 5 0

I.I

- r,__'-CT l

- 4 - � , .,.:. .,Ql��-:"�- -. '. Z, .

1 -�

r - 1*1 -

-I- A - I

- -'-

I.- -� * 1

) K I ..- �--&,Q A-

*� � i��'-�.- 1 �* I. / - -

*� I *� _ Il "-v' AN•�- 7

� �8

BRAVO I�E -. - - - \

-~- i

" I

I nSm

STRUCrURE CoTrWR MAP ON TOP OF THE TUBB =MuVAL

L

I';.

P f|i z-PERMIAN ISOPACH HAP,

CtT

2-C) X- Ic He 0

w { : _: titoer~~~~gst TV st 40oa ;4fvMs 4

, to / s I __nL ,,,'S ,,,st,,,-t to- w

4 z-A- .t . . _._t__ a ........................... . _ .... . .

1.

.. : %-K -

I I1*1 I I

-. ..4 - i

A *�- -

* *r 'u'�.---I *.1/ - -I. -�.--I *.-- - -I., * - **

o i1 km

I I I *s

AVAILABLE GEOPHYSICAL DATAIN THE TEXAS PANHANDLE

SEISMIC REFLECTION DATA

GRAVITY DATA

AEROMAGNETIC DATA

85-45,788

SEISMIC REFLECTION DATA

PROPRIETARY DATA

SWEC SURVEYS

VELOCITY SURVEY DATA

VERTICAL SEISMIC PROFILES

SYNTHETIC SEISMOGRAMS

85 45,789

.1

2W *0I�

to lor

0 L D H A Mi~ N'I 1'0821

*NNN ~ 0 TT E

NO 1(~~~~S0Z) A J IORM0TRON7C A 0 I

I SOW 0(221~~~~~~~~~~~~~~~ RM STR1--n --------------- ~ ~ ~ ~ 0-* I0TH101

-- If w-4* 0- ~ ~~~~~~~-------- l.1iR A N (INIA L.

I~A TR I 0P A R M E R~~~~~~~~~~~~~~

I~~~~~~~ I SW H( E R

K------ ------ 1 -- - -- V)eA I LE Y LA a

_ I H A LE ~~~ A M F L 0 Y D____ I~~~~~~~~~~~~~~~~

LEGENwDL WTS PROGRAM TEST WELLS*NIDRILLIED OF IN PROGRESSI

-SEISMIC REFLECTION SURVEY (1982)---- PURCHASED (PROPRIETARY) SEISMIC DATA

o WELLS WITH VELOCITY SURVEYS

0 10 20

SCALE -MILES0 20 40

SCALE -KILOMEtERS

4WTS PROGRAM TEST WELL ANDSEISMIC COVERAGE OF CENTRALPALO DURO BASINj000 -6181-37A

. I"/

U 9%

>1

N

1IaI

j ' -…EXISTING DATA BASEI ~~PI X- X ADDITIONAL PROPRIETARY

-; DATA AVAILABLE

I N - NEW ACQUISITION

iII

)NG

O 10 s0I a

SCALE MILES

R DEAF SMITH L L" v RANDALL I ARI

---- 1 r -F-Inooj ~~ ~~~ & I i !i

I. I.21 I I I a

PARMER __l CASTRO _LI SWISHER_ |

g . . . _ . . . .L

WSTRI

ATTACHMENT- 2CDP SEISMIC COVERAGEACTIVITY PLAN 13697-37

NORlTH

OKLAIIOtIA

* "p ~~~~ d ~~~. *, t:4 4 -J

490 so.. k: JA~ ~~ . *. *9* * . .* * * * ~ : *~ f~I:tt; *

* * * * * t *

*~~~~~~~L- j

, : : 0: v

BOUGUER GRAVITY ANOMALY MAP

SWEC SEISMIC DATA RECORDING AND PROCESSING PARAMETERS

The RFP issued in June, 1982, requested bidders to provide priceper mile quotations as follows:

A. Recording1. Spread: split/straddle using 24 phones (14 or 28 Hz dampened

60% of critical) per trace.

2. Vibrators: three available with not less than two operating toemploy 20 (2 x 10) 7 second sweeps at 20 to 120 Hz input for 11seconds.

3. Recording: 2 ms sample rate at 18-120 Hz band pass. Quoteprice per mile for each of the following configurations:a. 96 trace - 48 fold - 55' group interval - 55' sweep intervalb. 96 trace - 24 fold - 55' group interval - 110' sweep intervalc. 48 trace - 24 fold - 110' group interval - 110' sweep interval

B. Processing

1. Specify and quote a processing sequence of operations utilizingstate of the art production techniques at a 2 ms sample rate.

2. Provide full scale and half scale sections - three second length,full scale sections to be 20 traces per inch horizontally at 55'group and sweep intervals and 10" per second of reflection timevertically.

Western Geophysical Company was the successful bidder. Fieldexperimentation designed to establish recording parameters were conducted onJuly 7 and 8, 1982.

C. The following Recording Parameters were selected:1. Geophones: 16 per group - 10 Hz - dampened 70% of critical;

changed to 24 per group on April 6, 19832. Group length: 165'3. Group interval: 55'4. Spread: 2805' - 220' - 0 - 220' - 2805'5. Source: Sweep frequency 17 to 85 Hz - 3 vibrators - 30 (3 x 10)

9 sec. sweeps6. 13 sec. record length - 2 ms sample rate7. Filter: 12 - 90 Hz - Notch 60

D. Processing Parameters were essentially as specified and quoted byWGC. These included: Edit/Demultiplex, correlation and verticalsum; digital filtering, datum statics and trace balance; zero phasedeconvolution; CDP gathers; velocity analysis; automatic statics;NMO; coherency stack; gain and time variant filtering. A 3.0second record length for processing was selected to minimize cost.Comparisons between 24 fold and 48 fold processing failed to justifythe increased cost of 48 fold processing.

GJL&A - NRC/SRP Work Shop - 11/19/85

Budcbnk S

Reprocessing of Seismic Reflection Data

I. Introduction

Difficulty in interpretation of the DOE seismic reflection profiles collected in 1982and 1983 prompted the reprocessing of the data by the Bureau and the University ofTexas. Institute for Geophysics. Specific problems with the original stacked dataincluded:

1. the discontinuous nature of the Alibates reflector. possibly as a result of saltdissolution:

2. the variation in strength of reflectors associated with the San AndresFormation along the profiles; and

3. the lack of good resolution of the basement surface, in part because theseismic acquistion parameters were set to maximize resolution at the level of the SanAndres Formation.

The three primary objectives of the reprocessing program were to:

1) study the near surface data to identify acquision and/or processing problemsthat may have affected the continuity of reflectors:

2) examine the data in the vicinity of the San Andres Formation to determine thenature of lateral variability in the reflectors: and

3) better delineate the location of the basement surface, if possible, with theavailable data.

II. Procedures

A. Near surface reflectors were examined in a small-fold study of the field datausing near traces. In addition. velocity studies were made to insure that the datawere properly stacked.

B. Complex attributes of the data (instanteous frequency and amplitude) weredetermined from the stacked data to more precisely identify events associated withthe San Andres Formation and the basement surface.

Ill. Conclusions

A. In the cases studied, the disruption of near surface reflectors was related toloss of fold in the vicinity of "no permit" areas. Incorrect stacking velocities andthe presence of a strong airwave also contributed to the lack of continuity. Astudy of each line would be necessary determine if all apparent disruptions areartifacts of acquision and/or processing techniques.

B. Lateral variations in the San Andres Formation are, in part, related to variationin quality of data, and. in part, appear to be related to horizonal variations in bulkrock characteristics. However, there are insufficent geologic data at the presenttime to fully interpret the results.

C. Although complex attributes differ for the basement and overlying sedimentarysection. no unique seismic signature was noted for the basement surface.

LINE 0 BEFORE REPROCESSING

DB POWER SPECTRUM(AVERAGE)

0

0

- 10.

-20.

--30

-40.

-50.

-60.

-70.

-80.

--90.

-100.

- 110.

-120.

JI_ , I t I I, I ,

-~~~~~~~~~~~- -j

_I- - -1--- -t - - 1- - -1 - -

C v .D 00 0 I I I I

NOTCH- I

t -t-

I It I I t I I I 1 1_ I . - - tt- -- I -- t-- r----I

_ I __ __ _I_ _ i I _ I I_ _I_ _

_ _ _ _ _ t_ _ _ _ _ _ _ _ ___

_ IT -1 - t~F - I -T--F- -- ----- n-o 0 0 0 6 0 6 6 6 o

NOr lTC- I N -|

-7.0 -

- 14.0-

-21 0

0 -28.0

4 -35.0

C -42 0

- -49 00

I -56.0

--63.0

- 70 0 -

LINE 0 AFTER REPROCESSING

DB POWER S PE'C"1'lIW M(AVERAGE)

_ -+ -- Ft- F- -- - -I- - - - - - - -

)EJ

0- ol�

D

III

I"I'i�i

W

'!SCALE 1:15000001 " = 24 MILES

½~~74, r

67,,

MAGNETIC ANOMALY CALCULATIONS

Types: (1) Intrabasement(2) Suprabasement(3) Vertical Sheet

(1) INTRABASEMENT ANOMALY

Model:

Surface

Sediments

Basement

Ii ~~~~~~~~~12

V = 2n (11 - 12) (Nettleton, 1976)= 2n(0.002) (Nettleton, 1976)= 0.1256 gauss = 1256 gammas

Intrabasement anomaly is for vertical polarization and the vertical field component.

(2) SUPRABASEMENT ANOMALY

Model:

Surface

Sedimentsz

Basement

V = 21t/Z (Nettleton, 1976)= 2(0.002)(1000)/8000 X 105= 50 gammas fort = 1000feet= 100 gammas fort = 2000 feet

(3) VERTICAL SHEET ANOMALY

Model: V

IX = 0 Surface

Sediments

t

Zi

V = 21VtZ[(Z 1/Z21 + X 2) - (Z 2/Z 21 + X 2)] (Dobrin, 1976)= 2(0.001 5)(9 X 5280)(1/8000 - 1/28000) X 105= 1273 gammas

This isfort = 9 miles, X = 0, I = 0.0015, Z, = 8000 feet, Z2 = 28000 feet.

As for (1), anomalies calculated for (2) and (3) are for vertical polarization and forthe vertical field component.

MATADOR ARCH TOTAL FIELD MAGNETIC ANOMALY

1000

500

TotalField

Intensity(gammas)

0

-500

-1000

0 5 10 20 30 40

South North- Thin Dike Approximation Calculated (Ballantyne, 1980-Geophysics)- Profile is Perpendicular to Strike- No IGRF Removed

CALCULATED SUSCEPTIBILITIES OF ROCK MATERIALS

Magnetite Content and Suseeptibility, qga units

llmenite,Material Minimum Maximum Average average

% k X 10 % k X 10 % k X 10 % k X 1

Quarts porphyries 0.0 0 1.4 4,200 0.82 2,500 0.3 410Rhyolites 0.2 600 1.9 5,700 1.00 3,000 0.45 610Granites 0.2 600 1.9 5,700 0.90 2,700 0.7 1000Trachyte-eyenitee 0.0 0 4.6 14,000 2.04 6,100 0.7 1000Eruptive nephelitee 0.0 0 4.9 15,000 1.51 4,530 1.24 1700Abyssa nephelitee 0.0 0 6.8 20,000 2.71 8,100 0.85 1100Pyroxenites 0.9 3000 8.4 25,000 3,51 10,500 0.40 5400Gabbroe 0.9 3000 3.9 12,000 2.40 7,200 1.76 2400Monsonite-latites 1.4 4200 5.6 17,000 3.58 10,700 1.60 2200Leucite rocks 0.0 0 7.4 22,000 3.27 9,800 1.94 2600Daci-uarts-

diorite 1.6 4800 8.0 24,000 3.48 10,400 1.94 2600Andentes 2.6 7800 5.8 17,000 4.50 13,500 1.16 1600Diorites 1.2 3600 7.4 22,000 3.45 10,400 2.44 4200Peridotites 1.6 4800 7.2 22,000 4.60 13,800 1.31 1800Basalts 2.3 8e00 8.6 26,000 4.78 14,300 1. 91 2600Diabases 2.3 6900 6.3 19,000 4.35 1, 100 2.70 3600

wouca: L. B. Slichter and H. H. Stearn, "Geophysical Prospecting," Am. Inst. Mining Med.Engrs., Trams., 1929.

2800

2600 2596

2400 _

2200

,j uuVV

Q 1800x

' 1600._

j 1400

, 12000

. 1 000Ca, 800a

600

400

200

I

i.gneouvs .......647

Metamorphic

Do/o0mi/, sane,'n ~nd'sine Shale-8 Z3 32 52

No.samples 66Range of 0-75susceptibilities

66 230 137 61 5S 782-280 0-1665 5-1478 0-5824 3-6527 44-9711

FIGURE 14-14Average magnetic susceptibilities of surface samples and cores as measured inthe laboratory. (Compiled by J. W. Pte, Mobil Oil Corp.)

FIGURES FROM DOBRIN, 1976

/4~.-

0 ~ ~ ~ ~ ~ ... '~' &/ .2INCL. 900

-. - 2

,5 .

00

.0 s _4T/ I.I/ _ .2

- ^ x _ o INCL. 75

_-.5- - -.2

- I

Slock_ .2

OI Ck -

_-5 A -2

- ~ ~ ~ ~ ~ . . .2abA T0

.5 £ 1 I.2

o 00

_ - _ - -2

INCL. 60"

rOTAL INTENSITY

IECOflo VERTICAL.DERIVATIVE

INCL. 45*1

INCL. 300

INCL. 200

5 .2

J 4 S /5^c_ O INCL. 0

2

FIGURE 14-9Profiles of magnetic and vertical derivative (curvature) fields on a north-southline across a prism with top at I unit depth, bottom at infinity, and for thevarious angles of inclination shown. All curves are for a body 8 depth units long(represented by the shaded area) and 6 units wide north to south. (FromVacquier et al., 1951.)

N ObtLA-iOM A I

I

(Contour iniervai t 10 -gat o iOm

0 80km

-75.r- A A'

E -iGC

Computed

Observed-125_

o

-2000 2050 2100 2150 2200 2250kmn_-~~~~~~~~~~~~~~~~~~~~~~~~~~~M m km

_ 1~kl

_;_= ~ ~ ~ ~ ~ ~~~ _.. .I

,>~~~~ . ;. .lhlg . . :: . . .t . . . . r3 .

Seo 2eve/

r A |i 2 IC R Sand bnds grovel 5 'v

v L. s ,,2 50 i-2 Shoile A u -g ' r s 4 s L

: > 260 8E Dolomite or granite wosh < st s'w_4@-Cangre in sco~e ' r 0 2 70 * Anhydrite c-)J't, _

. ^, r r 300 i3 Baoalt and goobro or crustol loyer 3 > A > . (

120014000 *o **-

400

-- SL

400-4

~20--000

800-f

-L60002000-1

2400- ~8000Z~1z

EXPLAN360 01-r20 .. Lto

140001 L235 l

48000-

I ~~~~~~~~~~~~~~~~~ 2 55 SWhyi'

L 8,000 Scale 2 60 DOW-m

7~-

ATIO0NDgy

*ne and gbr

0 10 0 350m0 50km

270O GrfOnr12 80 * Anhydr3 00 E Oiobos

Figure 44. Gravity model B-8', modified from cross section B-8. Shaded area on computed curve Is a positive anomalypredicted from the model, which does not appear In the observed gravity. This requires that granites In this region be thinsills Intruded into a deep rhyodita basin. See figure 42 for location.

&4QA ~dtO

/ Co";lraci-'or cio/d

2. C2,o'Ike /.Ar

-4 6//e Ad/u"'I

~7 /e e//nv

6.C0,7 4 tlde Cr ePs7~~~n

Al:1Ai~

/ 7,7(/2 -7

NURE AERIAL RADIOMETRIC SURVEYS:FLIGHT-LINE SPACING

Lii293-10/83

0

+

++

++

INDEX TO SOURCES OF DATA

36-4

35.

* 280

+ 27°

+

-4. 96-

+

EJ E. M.

.U.S. Departme it of Energy, National Uranium ResourceEvaluation Aeromagnetic Data-3mile line spacing

U.S. Department of Energy-, National Uranium ResourceEvaluation Aeromagnetic Data-5 or 6 mile line spacing

U.S. Department of Energy, National Uranium ResourceEvaluation Aeromagnetic Data-12 to 20 mile line spacing

EDfll 1U.S. Atomic Energy Commission Aerorniagnetic Data-W 5 mile ine spacing-

+ ~ Bureau of Economic Geology, University-of Texas at AustinEl//S Aeromagnetic Data,26C

+

960 950 940

OMAGNETIC MAP OF TEXAS-SOUTHEAST SHEET

Steps in deletion of IU.questionable grid data

around the edges of a

block of four quads. 270 akALLEN(1 Block.= 20,000 records.) E

260 -~~~~260

100°

250Idb 980 9701

4

NrN ':ILI�-l

(Ii hiI

Pi i

g- I - 1(,�-Jt�01NK

I E

--3 3

Demonstration of the ability of Bendix software to make separate mapsthat fit together. Shown are the portions of the four map sheets ofthe Texas map at their common corner.

NRC WORKSHOPNovember 19 - 21, 1985

A.) Number and Location of Wells

Figure 1 - Study Area

Figure 2 - Distribution of Well Selection

Figure 3 - Well Locations

Figure 4 - County Distribution of Wells

B.) Lithologic Data

1) Largest source are geophysical logs specifically Density-Neutron - Sonic

2) Sample logs & Mud Logs

3) Core - limited core from exploration wells taken in producinghorizons and occasionally basement. The program wells are ouronly source of core throughout the stratigraphic section.

C.) Availability

1) Geophysical Logs & Mud Logs

Panhandle Electric Well Log Service

West Texas Electric Well Log Service

North Texas Electric Well Log Service

Rocky Mountain Electric Well Log Service

500 N. Baird StreetMidland, TX 79701

State Agencies

2) Sample Logs

Panhandle Sample Log Service1011 W. Ninth StreetAmarillo, TX 79109

American Stratigraphic Co.6280 E. 39th AvenueDenver, Co. 80207

Permian Basin Sample Laboratory401 N. ColoradoMidland, TX 79701

Ardmore Geological SocietyP.O. Box 1552Ardmore, OK 73401

-2-

D.) Quality of Data

Generally, the older the log the poorer the quality. The oldest login our data base dates from 1931. These older logs were resistivityand were types run in holes using poor drilling techniques, poor mudprograms, and crude instruments which were not serviced regularly.Technological advances over the years have improved the quality oflogs and their interpretation immensely. Quality also varies witheach logging service.

The following compares the type of geophysical log vs.use.

Percentage of Used forfile (est.) Correlation Lithology

Resistivity Logs (all forms) 40% Fair Poor

Gamma Ray - Neutron (all forms) 25% Fair Poor

Gamma Ray - Density (all forms) 15% Good Good

Gamma Ray - Sonic (all forms) 15% Good Good

Neutron, Density, Sonic (no gamma- 1% Poor Poorray)

All logs 4% Excellent Excellent

All of the data is available for purchase from commercial sources listed earlier.All of the interpretations regarding formations, major salt beds, and porositydeterminations are on computer tape.

E.) Organization

1) All information from each well are in folders arranged by state, alpha-betically by county, and by number.

2) SWEC identification numbers match Bureau numbers up to July, 1980Those numbers assigned to wells afterwards are followed by the letter"s" (not included in computer file). The original set of numberswere assigned from West to East and North to South. Later numberswere assigned to wells based on order of acquisition. Each countyhas numbers begining with No. 1. The county codes are listed onAttachment 2.

3) Each Folder contains:

- Geophysical Logs (if any)- Sample Logs (if any)- Mud Logs (if any)- State Records (if any)

Applications to drill

Pl4ts

Completion Reports

-3-

(used to check elevation, verify location, type and locationof production and yields, driller's logs)

- Well Record Sheet

Lists Formation tops and salt beds

4) Computer file

- Entered from well record sheet, salt information listedseparately on Attachment 5, p. 2

- changes to file made on change sheets, stamped by originator,Project Geologist when checked, and when change is verifiedand transferred to master file.

- change sheets organized by state, alphabetically by county,by number, chronologically.

5) Maps

- Postings of Formation tops or thicknesses with and/orwithout contours.

- Posting of elevations at a .1:250,000 scale and checked against2 degree USGS Topographic Map.

- check of anomalous values for possible errors.

-105-ooaa-, -104-0,0 '' -0-a o -a2a o -10olvaaoa -lws0oo w -ss-aa0oa -ss-waa( -9170W-W'

i i ( ff l *q~~~ B~-~-T--f-----r-!-----r - l- !~~< i ff |\

ol $ \) ~~~~~~---j t---- ------j----- Lj- LU- Ij

SelectedVA//2 Wells

AllWells

All Wildcats andSelected Field Wells

L: DISTRIBUTION OFWELL SELECTIONFigure 2NoWellsNOTE: Wells were selected based on depth, location, and year drilled.

I ~ ~ ~ ~ ~ ~ ~ ~~~~~~~~~~~-I-

* \* * ~~~~~~~~~~wows1* I IsNE"U-

- . 1-- - Z** WASHITA ** -

a~~~~~aWIPE ~ ~ ~ ~ ~ ~ . ..-ISWEERKOWA.

'PAM11WRI I.' .I 44 N*A

* I F ~~~~~~~~~~ 2 ~~~STEMENJS -VGE &VA

mmm~~~~~~~~~~~~~~~~~-' 4

L J' p' crk'w~ap T 'O~f~.*. ~ .*~.'.j~i - -* ~* '-*d `-

LOCATIONOF WELLNewMexco: 69 IFDTA AS

TOTAL 4624 F~~~~~~~~~c~~~iir-- -- ----

: , _y e l \'* .*,

1 105 W 00-104-'00'0( -103100'W 100-OW l1'OW -100-00'00' -M.W.M.OD

I --- T 1 F-rt-----r----.1-~--

8> -1 _ l ~~65/54 i 95/84 870

1 7117 ~~- ----------- ------ --------L------t------:e *,_,__ _ 8 _6,5/53 I I I5/2 7/21/010l 88|1

4 ;., !----~~i ---------- ,------ ------ ------i-------

403 3'1,454g9/1427 19/24i746/3'25i8/49!0/77/rl',16/ '?21 , i *, 2488 r; !~~---jIl12 I83; I57 j9/36/4 I~ l881 1413 160j22 o -2^-------

Zl/18! 110/110 - | - -~- - ;- --------- i - --- -- ,------i-----T__ 2/22122_

t ti I I 1-0045/4 -i'5 19/14 2418 3328 17!463382125/ .127/ 3 i2° 8j4i 219!20/ 0-5~~~~~~~~~~~~~ ----- -- oooo ------- -T mwo L11-00 -10-0'0 -9-0'W

4624/3849~~~~~~~~~~~~~~0 in8 14taBas

NOTES: (NUMBERS CROSS-REFERENCED TO WELL RECORD FORM -ATTACHMENT 4)

1. API NUMBER. NORMALLY FOUND BELOW DST RECORD OR ON STATERRC RECORDS. USUALLY INCLUDES TWO DIGIT STATE NO. (TEXAS-42),THREE DIGIT COUNTY NO. (MOORE-341) AND FIVE DIGIT WELLNUMBER.

2. EXACT LOCATION OF WELL WITHIN A SECTION. 1320TRANSLATES TO 1320 FT FROM SOUTH LINE AND 1320EAST LINE. "SOUTH" AND "EAST" ARE CROSSED OUTRECORD FORM.

FRFTON

S&E/LFROMTHE WELL

T 3. DATE OF LOGGING RUNS, EXCLUDING COMPUTED LOGS SUCH ASCORIBAND OR CYBERLOOK. DO NOT ENTER DATE DRILLED.4. DEPTH OF WELL MEASURED BY LOGGER - NOT BY DRILLER UNLESS

THE DIFFERENCE IS MORE THAN 50 FT OR THE COMPLETION REPORT(W-3) INDICATES A DEEPER DEPTH AND/OR WELL WAS PLUGGEDBACK (p.b.) BEFORE LOGGING.

5. REFERENCE ELEVATION FOR LOGS (NOTE K.B.-KELLEY BUSHING,D.F.-DECK FLOOR OR GL-GROUND LEVEL).

6. INDICATE OTHER LOGS RUN BUT NOT IN WELL FILE (USE ABBREVIA-TIONS ON ATTACHMENT 6)

P.".4 eL&*4. Sm-&.eam. % to

nonj pasme

'-:-1-- II

PERMIAN BAMiN GPMONWI I

13697

DNo. L 0II t@leilloll "it@@@

wug wV..

9oup saw

g3I 0keinS -o 4-3-1999r

*0

-I

'-4

l

ATTACHMENT 2FTP 13697-18-1

State and County Abbreviations used for Well Identiflcation Numbers

CountyName

AbbreviationsState County

CountyName

AbbreviationsState County

ARCEERARMSTRONGBAILEYBAYLORBRISCOECARSONCASTROCHILDRESSCLAYCOCHRANCOLLINGSWORTHCOOKECOTTLECROS2YDALLAMDEAF SMITHDICKENSDONLEYFLOYDFOARDGRAYHALEHALLHANSFORDHARDEKANHARTLEYHEMPHILLHOCKLEYHUTCHINSONKINGKNOXLAMBLIPSCOMBLUBBOCXMONTAGUEMOOREMOTLEY'OCHILTREEOLDHAMPARfERPOTTERRANDALLROBERTSSHERMANSWISHERWHEELERWICH:TAWILBARGER

TXTXTXTXTXTXTXTXTXTXTXTXTXTXTXTXTXTXTX5XTX$XTXTXSXTXTXTXSX

5XTXTXTXSXTXTXSXTXTXTXTXTXTXTXTXTX

ARCARM3AIBAYBRICARCASCHICLACOCCOLCOOCOT

DALDEADICDONFLOFOAGRAHAEHALHANDDM

HARHEMHOCHUTKINKNOLAMLIPLUBMONMOOMOTOCHOLDPARPOTRANROBSHESWIWHEWICWIL

C3AVESCOLFAXCURRYDE BACAGUADALCUPEHARDINGLEALINCOLNMORAQUAYROOSEVELTSAN MIGUELTORRANCEUNION

BECKHAMCADDOCARTERCOMANCHECOTTONCUSTERGARVINGRADYGREERHARMONJACKSONJEFFERSONJOHNSTONKIOWALOVEMARSHALLMCCLAINMURRAYSTEPHENSTILMANWASHITA

NMNMNMNMNMNMNMNMNMNMNMNMNMNM

OKOKOKOKOKOKOKOKOKOKOKOKOKOKOKOKOKOKOKOKOK

CHACYXCURDEBGUAHRDLEALINMORQUAROOSANTORUNI

BECCADCRSCOMCTTCUSGARGDYGREHRMJACJEFJOHKIOLOVMARMCCMURSTETILWAS

ATTACHMENT 3PTP-13697-18-1

F= CHECKLIST

PROJECT: Permian Basin JOB

STATE: zrXvA'o COUNTY:

WEL#:®R Moo - 33

Z Sample Log t

o ® Scout TicketO ()State Permits

O / .

S: 13697 OD DAT: Fgb 24, tQ4-

MO ME (2)LOCATION: i o & 4-4 I Ukrr.

®3WELL NAME: SocomM'(-P'S6LR-S cook ~w (D-.0

@Tpe of Los Ortder

Csg !BRssv

O sCompleted Record Form

NOTES:1. DATE OF INVENTORY.2. INCLUDE SECTION, BLOCK, TOWNSHTP, RANGE AND SURVEY.3. SWEC WELL IDENTIFICATION NUMBER.4. INCLUDE OPERATOR AND LEASE NAME.5. CHECK IF LOG INCLUDED AND ITS SAMPLE NO.6. CHECK IF SCOUT TICKETS ARE INCLUDED IN FILE.7. CHECK IF STATE PERMIT OR APPLICATION FOR PERMIT IS INCLUDED (FORM 1, W-1).8. OTHER STATE INFORMATION: INDICATE TYPE - PLAT, W. (WELL RECORD), DL (DRILLERS LOG)

PR (PLUGGING RECORD), W-2, W-3, G-1.9. CHECK IF SWEC WELL RECORD FORM GP-013081-2A IS INCLUDED.

10. TYPE OF LOG AND -REFERENCEORDER No. USE ABBREVIATIONS SHOWN ON ATTACrMENT 6.

WELL RECORDSTONE a WEBSTER ENGINEERING CORPF(*m GP-013081-2A

sECTwKN .L/ 06 w.....mGEGATE sALT - aL.. -WELL Nao. Atoox3L....

ILOCK/~ - 44 DEEPEST FORMATION PENETRATED LIOLFCA9e4PSTAVE 74fXA5 SURVEY/*MNG .. IL%4 C....7......LATITUDE Q~5-4A LONITUoE - 101. t32 BCOUNT. v Ai OO/tArPiERmit mo NO D..z311 - 99OPERfATOR -AMS&I~ OI .....LEASE Qje .1ONi,-

-~~~~ ~FEET HOm~fl)%Wo

L3Z0F~EET 4A6*/ WIEST

DATE UN~k SF0 (Q) L 3/.~TOP OF ROCKIIIEL.1 _____

IDEP114 Of WELL(j . Q4..CLEVAIION/RIEFERENCE '!_a.sklDF*GL ETC I

RECORDS I LOGS-AVAIL ABLE __________

LOGS I" ISOSJSE

FOfMATION

OGALLALADAKOTA GROUP

F REORICKSOUflGTRINITY

MORRISOEXETERi

DOCKUM

TECOVASSANTA ROSA

OEWEY LAKEALIBATESY-HIIE"RSE

SALAOOYATESU. SEVEN RWVRBa.. SEVEN RIVERSQUEEN/GRAYOURGU. SAN ANIMRESL.-SAN ANDRES

DEPTH ITOP-DOT)

27-5-42a

321W -iola

FORMATION

TOP EL

RECORDFORMATION

CLEAR FORK GPGLETAU.CLEAR fMRTUBSLICLEAR FMfK

RED CAVE

WICNTAW- FCAMP_

MISSISSIPPIANELLENOURGERCAMBRIAN SS.PRECAMBRIAN

DEPTH (TOP-DOT) TOP EL

ra4A-?3n_13039IkA6__

as- *A. 29

1*11-2317-

ZA~z~M ._

SALT FROM %

LOG QUALITY QIOGS INIERPRETED eV

LOGS CdIEtCKED

RECIECKED

LOCATIO" C"IECKED

RECSIECKED

L6DJRA, ..22 -a n AGGIEGATIE SALT TIM .. 87INSW1ER OF LAERS -

MIOCKER It"* 5 FEET 3

VIICKEIR TItAN 20 FEET

IEPISH TO ISICKEST LAVER 4-IUK.CNIES Of THICKEST LAVER _ _fi_ _ELVAIKHOI Of TIIIESI LAYER . _ ..

S .I

-- U ~~ -___________SEE PACE 2 FOR NOTES.

_______a

SALT INFORMATION

FORMATION

a1. Cl'AR FugRK

LCa40i fork

SALT ELEV. SALT DEPTH

1450-im-L

lizl-115 2

SALTTHICK5go

e

ziL

zo

ws

FORMAT!"SALAD_SEVEN RIVERSU. SAN MM$L. SAN ANDREJGLORIETAU. CLEAR FORK

TWO -L. Cl1 FAR MMR

TOTAL SALT

a--a-

~0~-'Zr62

FORMATION MAWL15-

N,310. Fs LSA 5, FIOP-AlA91, FDOT - 9. 3

ti-330. F. tISA 3. FI('P--SA.. FOOT- 10#fB.AN-350. Fu ISA 3. fop.,1646 . ueorF.ja62 -ANd.370. F- LSA 21fow. F 6~sj# F81J AC

ADDITIBONAL INFOR MAT ION

NOTES:

1 THRU 6 - SEE ATTACIHMENT 17. INDICATE LOG(S) FROM WHICH SALT BEDS WERE DETERMINED.B. INDICATE GOOD. FAIR OR POOR.9. INITIALS OF INTERPRETER AND DATE.

10. DATE AND INITIALS OF INDIVIDUAL WHO CHECKS THEINTERPRETATION AND LOCATION (ONLY WHEN RRC RECORDS

ARE AVAILABLE).11. FILLED IN ONLY IF INTERPRETER IS CERTAIN THAT THE

GEOPHYSICAL LOG COVERS THE ENTIRE SALT SECTION.NUMBER OBTAINED FROM "SALT INFORMATION" SECTIONOF FORM.

I-.

---

GP-122982-2 (FRONT)NOTIFICATION OF CHANCES TO THE OIL & GAS WELLFILE

N ELEV AND REP VELL J (3

ATTAC NT 5?TP 13697-18-1PAGE 1 OF 2

NEW LATITUDE ^NEW LONGITUDE NWTOTAL AGGREGATE SALT

CouN _STATEOLD WEIL I (IF CHANGED) ni

1. CHANGES OR ADDITIONS TO FORKATION PISCS

NO. FORMATION MMI TOP -AS? j BT 0 |/

0 SURFACE _ |5 COLORADO N _ _ _ ___:

25 TRINITY _ I_ 1. FOR CANGES T- WELL NUM BERS- E7H OLD AM NEW MM ERS440 MORRISON MUSZ BE ENTERED. FOR N W W . ATTACH A COPY OFITHE

_50_tEXXER._ REC":11_5S _ AC E 2. JSDI.MU E PREI M AN "0" AND LONGITUDE60 W CXDOS ._ _ W A (-). I.E.. 035.JA67 AO -101.6328.75 SANTA A I FORMATION ISA W LISTNG, THE MAKE0 CoILmN

100 DEWEY 1g RLAKE _____BE CEC__ I I I110 _ ;IATES --- -UZSE Vs T [RF TOP OF TV TH 'rnp n L: VC *E Tr,120 SAIADO ABSEa FORMATION AMEO D3 O130 YATES _ _ _ DEPI 'A". A QUESTAMAUT12 AO140 U SEVEN TT/l"P IPTCR150 L S m N A o n VCTTO N MARV TN ATrW T ATW COTUMNU160 QUEENOGRAYNS THAT AR E NQTATElIOULn E T170 U S ANDRES ANKO TA1'F RY A "Ti

:200 L SAN ANDRES 6. S DERE ITAON OF TA SALT BEDITHA-310 LS- 5 _ _ IS A AL 7 FVT TRT330 LSA6 TC . AND _LY_.350 LSA 3 NOT S T TOTAT Rrn THTSS370 LSA 2 FOR QRMATTnN! T Nrn vTAR< F SAT T WOPMATTQ4.390 LSA 1 - T DEPl SXOULD BE ENIERED I BOTH THE "TOP" -395 FLOWERPOT' _aTI__ COLUMNS.410_- GLORIETA 7. THE AE COLUMN SHOULD BE CHE IF THE FORMATIN IA420 U CLEAR FORK NM iST __430 T SA THTME DC AlS TONSAL -.440 L CLEAR FORK I REDS.£450 _RED gAC__ R. AGGF S THT S Or SALTBEARING FO ATIONaDL __&I:ADOR_ _ TEiE TOTAL OF ALL SALT TE1ICKNES ES IS ENTERED ON T1 E

;452 U SPRAYBERRY -- F RNT PAIM OF THIS FOP__53 SPRAYBERRY in TO iELETE A FORMATION. SALT D PTH. OR OTHER DATA PUT A

454 L SPRAYBERRY CENT SIGN "c" IN THE 0PROPRI TE COLUMN.456 DEAN,460 WICHITA I470 I WOLFCAMP _ _'500 !PNNSYLVANIAN:600 MISSISSIPPIAN ";603 LIPLP9OJ __ _ -

WOODFORD

-610 FSETm& _61L. L N - -

615 MONTOYA _,620IVIL __,640 ISIPST.P_ _700 ELLrNEURGERt730. DEVONIAN760 SILURIAN790 oaDOVICLAN800 -. CAMBRIAN _9Qf ... .YRECABIAL

-4 9

a �-* a-

-, 9

�i. I �I -- I-(16) t-� I I-

-'I I-

-I II - I I -1.

b '-�

G'P12..,8-L(BACXQz. CHANGES OR ADDITIONS TO TARGET SALT PIcKS©

ATACHENT 5FTP 13697-18-1PAGE 2 OF 2

WELL #

BmWrOK 171 §A uL- IQINo. FORMATION I MAKE? A/?I-ammb-4114W

I I1 CAT AM wT-r I Mn145S U`7R TvT I _175 USA TT - I

1 3-LSA 5 TvT - I I -33S_ LSA43 TGT _____ -l - -

LSA2 TT -I =:355L' LSA I TaT _____-,-

i 41S GLORIETA TvT I I -_ I'425_ U CLEARFK TGT I I I.

3. CRUCES

MT IFAI nW Y Ih -.-- .'. -___________________ __________________

OR ADD MTONS TO 85 PURE SALT PICKS

4.

5.

6.

7 .

NO.1 PORMAON RANE? TOP /?| BOT TT ? SALT

S ~~~- -- rT!902 ifSALO T=1904 U7R .,906 USA TX i_ I1908 1LSA 5 s T910; LSA 4 - I_912 LSA 3 TR -t- TT_ -914 LSA 2 TX _-916 1 LSAL TX -918 iGLORIETA TR __9 20 UC_ _ _ _ _ _ _ _ _ _ _922 LC| TX ___K___ _ _

'932 Q/G TX _ _1934 1TUBB TX I_ _

CHANGES OR ADDITIONS TO AGGREGATE SALT THICKNESSES

NO FORMATION NAZE? THICKNESS

21L4 SALADO SALT O21S U7R SALT __O216 L7R SALT O _217 USA SALT O218I LSA SALT O0

1 1L | GLOR SALT O220 UCF SALT O221 !TUBB SALT _ 0222 |LCF SALT 0 O.223 IYATES SALT O

,224..,. 7 QIG SALT O

CHANGES OR ADDITIONS TO FIRST SALT DEPTHS

NO. FOR'ATION DEPTHITO FIRSTSALT|

*240|_ USA FIRST1241_ LSA 5 FIRST I I1242 LSA 4 FIRST _ __ _7

CHANCES OR ADDITIONS TO EVAPORITE SEQUENCES ABOVE AND BELOW TARGET SALT

|NO. FORMATION NAME? TOP BOTTOM

ADDITIONAL CHANCES

|NO. _ _FORMATIQN _ _NAME?___ I_

GEOPHYSICAL WELL LOG ABBREVIATIONS

SCHLUMBERGER

INDUCTION-ELECTRICAL SURVEYINDUCTION-SPHERICALLY FOCUSED LOGDUAL ISWUCTION-LATEROLOG'DUAL !NOUCTION-SPHERICALi.Y FOCUSED LOGDUAL LATEROLOG'MICROLOG'MICROLATEROLOG0PROXIMITY' LOGMICRO-SPHERICALLY FOCUSED LOGFORMATION DENSITY LOGCOMPENSATED NEUTRON LOGSIDEWALL NEUTRON POROSITY LOGBOREHOLE COMPENSATED SONIC LOGLONG-SPACED SONICNATURAL GAMMA RAY SPECTROMETRYELECTROMAGNETIC PROPAGATION LOGHIGH RESOLUTION DIPMETERCONTINUOUS DIRECTIONAL SURVEYWELL SEISMIC TOOLFORMATION INTERVAL TESTERREPEAT FORMATION TESTERSIDEWALL SAMPLER

WELLEX-ORESSER ATLAS

GAMMA-GUARDINDUCTION-ELECTRIC LOGCOMPENSATED ACOUSTIC VELOCITY (WITH GAMMA RAY)COMPENSATED DENSITY LOG (WITH GAMMA RAY)FORXORADIOACTIVITYDENSITY (WITH GAMMA RAY)COMPENSATED DENSITY-NEUTRON LOG (WITH GAMMA RAY)SIDEWALL NEUTRON (WITH GAMMA RAY)COMPENSATED DENSITY. DUAL SPACED NEUTRON (WITH GAMMA RAY)BOREHOLE COMPENSATED ACOUSTIC LOG (WITH GAMMA RAY)

FRONTIER

GAMMA RAY-NEUTRONDENSITY (WITH GAMMA RAY)TEMPERATURE (WITH GAMMA RAY)

LANE

DENSILOG (WITH GAMMA RAY)GAMMA RAY-NEUTRONRADIOACTIVITYDIFFERENTIAL TEMPERATURE

ATTACHMENT 6PTP 13697-18-1

IESISF,OILDISFDLL'MLMLLPLMICROSFL'FOCICNL 'SNP'BHCLSS'NCS'EPT'HOT-CDRWST-FIT,RFT-CST

C/GIELC/AUL/(GR)CDL/(GR)FORXOGRNDEN/(GR)COL/N/(GR)SWN(-GR)CO-DSN(-GR)BHC-AL/(GR)

GRNDEN(-GR)TEMP(-GR)

GOCGR/NNGR/NN0IFF-TEMP

NOTES (t) SPECIAL LOGS. SUCH AS CORIBAND. CYBERLOOK. AND SPECTRALOG.SHOULD BE SPELLED OUT (NO ABBREVIATION).

(2) VARIOUS CEMENT BOND LOGS EXIST. SUCH ABBREVIATIONS WOULD BE:

CEMENT BOND CBCEMENT BOND EVALUATION CBEACOUSTIC CEMENT BOND EVALUATION ACCBEACOUSTIC CEMENT BOND ACCE

(3) MOST OF SCHLUMBERGER LOGS ARE RUN IN COMBINATION. FOR EXAMPLE:

DUAL LATERLOGCMICRO SFLMICROLATERLOG OLL-MSFL-MLLCOMPENSATED NEUTRON-FORMATION DENSITY CNL-FDC(-GR)

(WITH GAMMA RAY)

(4) HYDROCARBON MUD LOG HC

(5) GAMMA RAY GR

I MARK OF SCHLUMBERGER

SUMMARY OF WELLS DRILLED AND TESTED BY SWEC

1. Sawyer No. Ij Donley County,October 15, 1981. T.D.: 4806 ft.

started June 23, 1981, completedPresent status: Final plugged.

a. Casing Program - 13 3/8 in. conductor to 66 ft, 9 5/8 in.337 ft, 5 1/2 in. production to 3938 ft, 4 in. liner from4806 ft.

b. Rock Coring (all 4 in. OD core) - Total of 3872 ft, from 66ft, Yates through Pennsylvanian.

surface to3938 ft to

ft to 3938

MAJOR SALT SECTION

0.

0

0

0

0

Upper San AndresLSA - Unit 5LSA - Unit 4LSA - Unit 3LEA - Unit 2

438 ft to 652 ft, thickness652 ft to 756 ft, thickness756 ft to 840 ft, thickness840 ft to 894 ft, thickness894 ft to 947 ft, thickness

214 ft104 ft84 ft54 ft53 ft

Unusual features - Fault zone at 756-762 ft - 155 of missing section.

c. Drill Stem Tests (DSTs)

No. 1 2950 ft to 3123 ft - Wolfcamp, PI = 816 psi, K = 0.15 md

d. Geophysical Logging - Complete suites of cased and open hole logs.

e. Long-Term Pump Testing and Fluid Sampling

Zone 1 - Ellenburger Sand, 4716 ft - 4746 ft, unable to obtain datato determine PI or K, 4 downhole and 2 surface samples.

Zone 2 - Ellenburger Top, 4604 ft - 4640 ft, PI = 1390 psi, K0.3 md., 4 surface samples.

Zone 3 - Penn. Limestone, 4500 ft - 4535 ft, PI = 1531 psi, K =5.4 md., 4 downhole and 2 surface samples

Zone 4 - Penn. Limestone, 4258 ft-4342 ft, PI = 1350 psi, K =2.7 md., 7 downhole and 10 surface samples.

Zone 5 - Wolfcamp, 3189 ft - 3172 ft, PI = 977 psi, K = 2.7 md.,3 downhole and 20 surface samples.

f. Dissolution Zone water Well

Sawyer No. 2, 784 ft, 20 ft screen section at bottom of hole in LSAUnit 4. Testing by TBEG began April, 1983.

BXI-1369711-70/71 I

2. Mansfield No. 1, Oldham County, started October 19, 1981, completedDecember 19, 1982. T.D. 4995 ft by SWEC, 7409 ft by Baker & Taylor(dry hole). Pr-esent status: Final plugged.

a. Casing Program - 13 3/8 in. conductor to 41 ft, 9 5/8 in. surface to1212 ft, 5 1/2 in. tubing to 5180 ft.

b. Rock Coring (All 4 in. OD core) - Total of 4196 ft.

o 46 ft to 3540 ft - Dockum to Red Caveo 4023 ft to 4123 ft - Wichitao 4393 ft to 4995 ft - Wichita and Wolfcamp

MAJOR SALT SECTION

o Upper San Andres 985 ft to 1373 ft, thickness 388 fto LSA - Unit 5 1373 ft to 1546 ft, thickness 173 fto LSA - Unit 4 1546 ft to 1815 ft, thickness 269 fto LSA - Unit 3 1815 ft to 1940 ft, thickness 125 fto LSA - Unit 2 1940 ft to 1978 ft, thickness 38 fto LSA - Unit 1 1978 ft to 2001 ft, thickness 23 ft


No. 1 4800 ft - 4996 ft - Wolfcamp PI = 1322 psi K= 26.6 md.No. 2 4550 ft - 4650 ft - Wolfcamp - Did not produce sufficient fluid.No. 3 4550 ft - 4650 ft - Wolfcamp - Did not produce sufficient fluidNo. 4 4550 ft - 4650 ft - Wolfcamp - Unable to set packers.No. 5 6994 ft - 7409 ft - Granite Wash - Did not produce sufficient fluid.No. 6 6612 ft - 6640 ft - Penn. Carbonates, PI = 2230, K = 21.4 md.No. 7 4812 ft - 4840 ft - Wolfcamp, PI = 1404, K = 30.22 md.

d. Geo;hysical Logging - Complete suites of cased and open hole logs.


Zone 1 - Wolfcamp, 4818-4890, PI = 1470 psi, K = 3.3 md., 8 downhole and24 surface samples

Zone 2 - Wolfcamp, 4514-4638, PI = 1150 psi, K = 0.6 md., 9 downhole and 8surface samples.

f. Dissolution Zone Water Well

Mansfield No. 2, 780 ft, 30 ft screen at bottom in Queen/Grayburg.Testing by TBEG began June, 1983.

BX1-1369711-70/7 2

3. Detten No. 1 - Deaf Smith County, started February 26, 1982, completedMay 5, 1982. T.D. 2839.3 ft. Present Status: Final plugged.

a. Casing Program - 13 3/8 in. conductor to 53 ft, 9 5/8 in. surface to 1122ft.

b. Rock Coring (all 4 in. OD core) - Total of 1249 ft

o 1129.2 ft to 1423.0 ft - Salado, Yates, Upper Seven Riverso 1884 ft to 2839.3 ft - Upper San Andres, Lower San Andres to Unit 3

MAJOR SALT SECTION

o Upper San Andres 1866 ft to 2374 ft, thickness 508 fto LSA - Unit 5 2374 ft to 2575 ft, thickness 201 fto LSA - Unit 4 2575 ft to 2830 ft, thickness 255 ft


No. 1 1160 ft - 1360 ft - Upper Seven Rivers - Unsuccessful - Poorpacker seat.

No. 2 1299 ft - 1366 ft - Upper Seven Rivers - Unsuccessful - Poorpacker seat.

No. 3 2749 ft - 2839 ft - LSA Unit 4 Dolomite, P.I. = 1150 psi,K = 0.16 md.

d. Geophysical Logging - Complete suites of open hole logs.

e. Long-Term Pump Testing and Fluid sampling - None.


Detten No. 2, 1325 ft, 20 ft of screen at bottom in Yates. The well wascompleted in March, 1933. Testing, monitoring, and sampling by TBEGcontinues.

BX1-1369711-70/73 3

4. G. Friemel No. 1 - Deaf Smith County, started February 23, 1982, completedMarch 31, 1982. T.D. 2710 ft. Present Status: Final plugged.

a. Casing Program - 13 3/8 in. conductor to 50 ft, 9 5/8 in. surface to 1058ft.

b. Rock Coring (all 4 in. OD core) - Total of 1121.7 ft

0

0

1191.5 ft to 1312.0 ft -1709.0 ft to 2710.2 ft -

Yates, Upper Seven RiversQueen/Grayburg, Upper San Andres, andLower San Andres to Unit 3

MAJOR SALT SECTION

0

0

0

Upper San AndresLSA - Unit 5LSA - Unit 4

1742 ft2331 ft2435 ft

to 2331 ft, thickness 589 ftto 2435 ft, thickness 104 ftto 2688 ft, thickness 253 ft


No. 1 2600 ft - 2710 ft, LSA0.07 md.

Unit 4 Dolomite, P.I. = 975 psi, K =


e. Long-term Pump Testing and Fluid Sampling - None.

f. Dissolution Zone water Well - None.-

BX1-1369711-70/74 4

5. Zeeck No. 11982. T.D.May 2, 1984.

- Swisher County, started April 9, 1982, completed August 17,7652 ft. Pump testing started September 22, 1983, completedPresent Status: Final plugged.

a. Casing Program - 13 3/8 in. conductor to 26 ft, 9 5/8 in. surface at 1024ft, 5 1/2 in. to 7421 ft.

b. Coring (all 4 in. OD core) - Total of 1993 ft

0

0

0

0

0

1035 ft to 1144 ft -1885 ft to 3102 ft -

SaladoQueen/Grayburg, Upper San Andres, Lower SanAndres Units 5, 4, 3, and Upper Section ofUnit 2.Wichita/Wolfcamp Contact and Upper WolfcampWolfcampPennsylvanian Carbonates

530959107300

ftftft

tototo

578060587387

ftftft

MAJOR SALT SECTION

0

0

0

0

UpperLSA -LSA -LSA -

San AndresUnit 5Unit 4Units 3,2,&1

2014 ft to 2574 ft, thickness 560 ft2574 ft to 2732 ft, thickness 158 ft2732 ft to 3014 ft, thickness 282 ft3014 ft to 3188 ft, thickness 174 ft


No.No.No.No.No.

12345

10191019303529322927

ftftftftft

10441044310331033103

ftftftftft

Salado, Unsuccessful.Salado, Did not produce sufficient fluid.LSA, Unit 3, Did not produce sufficient Fluid.LSA Unit 3, Unsuccessful.LSA Unit 4 Dolomite, P.I. = 1250 psi, K =0.25 md.Upper Wolfcamp, PI = 1875 psi, K = 6.77 md.Pennsylvanian, PI = 2559 psi, K = 2.83 md.

No. 6 5365 ft - 5542 ft -No. 7 7146 ft - 7225 ft -

d. Geophysical Logging - Complete suites of open and cased hole logs.


Zone 1 - Penn. Carbonates, 7140 ft - 7230 ft, P.I. = 2400 psi, K - 15 md.,10 downhole and 48 surface samples

Zone 2 - Wolfcamp, 5603 ft - 5640 ft, P.I. = 1960 psi, K = 1 md.,6 downhole and 9 surface samples.

Zone 3 - Wolfcamp, 5470 ft - 5550 ft, P.I. = 1890 psi, K = 7 md.,3 downhole and 34 surface samples.

Zone 4 - LSA Unit 4 Dolomite, 2930 ft - 2970 ft, P.I. = 1300 psi,25 surface samples

f. Dissolution Zone water Well - None.

BX1-1369711-70/75 5

6. Harman No. 1 - Swisher County, started July 29, 1982, completedSeptember 7, 1982. T.D. 3052 ft, hole completed as Shallow DissolutionZone Water Well (see below)

a. Casing Program - 13 3/8 in. conductor to 40 ft, 9 5/8 in. surface to 1063,cement to plug 1220 ft + to 1400 ft +.


o 1070 ft to 1303 ft - Alibates, Salado, Yates, and UpperSeven Rivers

o 1804 ft to 3052 ft (T.D.) - Queen/Grayburg, Upper San Andres, andLower San Andres into Unit 2.

MAJOR SALT SECTION

o Upper San Andres 1949 ft to 2466 ft, thickness 517 fto LSA - Unit 5 2466 ft to 2651 ft, thickness 185 fto LSA - Unit 4 2651 ft to 2931 ft, thickness 280 fto LSA - Unit 3 2931 ft to 3012 ft, thickness 81 ft


No. 1 2840 ft - 3050 ft - Unit 4 Dolomite, P.I. = 1203 psiK = 0.011 md., minor leakage notedaround packers.

No. 2 2830 ft - 3050 ft - (T.D.) - Unit 4 Dolomite, P.I. 1315, K =0.186 md.


e. Long-Term Pump Testing and Fluid Sampling - None.


Installed in existing borehole with open hole section from bottom ofsurface casing at 1064 ft to top of cement plug at 1220 ft +. Gravelpacked screen (30 ft long) set in Yates. The well was completed in March1983; Testing, monitoring, and sampling by TBEG continues.

BX1-1369711-70/76 6

7. Friemel No. 1 - Deaf Smith County, started October 15, 1982, completedMarch 18, 1983. T.D. 8283 ft, pump testing started May 3, 1983 completedSeptember 19, 1-984. Present status: Final plugged.

a. Casing Program - 22 in.. conductor to 48 ft, 16 in. surface to 1210 ft,10 3/4 in. intermediate salt string to 4695 ft, 5 1/2 in. to 8283 ft.


o 352 ft to 1464 ft -

o 1846 ft to 2830 ft -

Dockum, Dewey Lake, Alibates, Salado,Yates, and Upper Seven RiversUpper San Andres, LSA Units 5, 4, andUpper Section of Unit 3WolfcampPenn. CarbonatesGranite WashGranite Wash

0

0

0

0

5519642176988047

ft to 6032ft to 6537ft to 7780ft to 8283

ftftftft (T.D.) -

MAJOR SALT SECTION

0

0

0

0

UpperLSA -LSA -LSA -

San AndresUnit 5Unit 4Units 3,2,&1

1880 ft3372 ft2560 ft2822 ft

to 2372 ft, thickness 492 ftto 2560 ft, thickness 188 ftto 2822 ft, thickness 262 ftto 3018 ft, thickness 196 ft


No. 1No. 2No. 3

958787

1279

ftftft

12168501464

ftftft

No. 4 1279 ft - 1464 ft -

No. 5 2753 ft - 2830 ft -

No. 6 5630 ft - 5909 ft -No. 7 7692 ft - 8283 ft -

Santa Rosa - Too High Producer.Santa Rosa - Unsuccessful.Upper Seven Rivers - Did not producesufficient fluid.Upper Seven Rivers - Did not producesufficient fluid.LSA Unit 4 Dolomite - Did not producesufficient fluid.Wolfcamp, P.I. = 1756 psi, K = 10.3 md.Penn. Carbonates and Granite Wash -Unsuccessful,Tool stuck.

d. Geophysical Logging - Complete suites of open and cased hole logs.

e. Long-Term Pump Testing and fluid sampling

Zone 1 - Penn. Granite Wash, 8168 - 8804 ft, Formation press =2840 psi, K = 29 md., 12 downhole and 54 surface samples.

Zone 2 - Penn. Granite Wash, 8122-8132 ft, Formation Press = 2809 psi, K131 md., 23 surface samples.

Zone 3 - Penn. Granite Wash, 8040-8050 ft, formation press = 2766 psi,K = 152 md., 21 surface samples.

Zone 4 - Penn. Granite Wash, 7890-7904 ft, Formation press. = 2684 psi,K = 3.3 md., 10 downhole and 52 surface samples.

Zone 5 - Penn. Granite wash, 7707-7711 and 7729-7734 ft, Formation press. =2615 psi, K= 1000 md., 15 surface samples.

BX1-1369711-70/77 7

Zone 6 - Penn. Carbonate, 7300-7326 ft, Formation press. = 2428 psi,K = 92 md., 11 downhole and 47 surface samples.

Zone 7 - Wolfcamp, 5825-5926 ft, Formation press = 1721 psi, K = 1.3 md.,17 downhole and 89 surface samples.

Zone 8 - LSA Unit 4, 2754-2798 ft, Formation press. = 957 psi, K = 0.04md., 25 surface samples.

Zone 9 - Queen/Grayburg, 1690-1770 ft, Formation press. = 510 psi, K = 1.2md., 13 downhole and 23 surface samples.

f. Seismometer - seismometer installed at a depth of 480 ft in the well.Surface facility expected to be constructed and system operational byDecember, 1985.

BX1-1369711-70/7 8

8. Holtzclaw No. 1 -March 24, 1983.December, 1983 (see

Randall County,T.D. 2884 ft.below). Present

started February 28, 1983, completedHydro fracture testing performed instatus: Final plugged.

a. Casing Program - 20 in. conductor to 41 ft, 10 3/4 in. surface to 1125 ft.

b. Rock Coring (all 4 in. OD) Total of 901 ft

1080 ft - 1401 ft - Dewey Lake, Albates, Salado, Yates and Upper SevenRivers

2304 ft - 2884 ft - Upper San Andres, Lower San Andres Unit 5, 4 & into 3.

MAJOR SALT SECTION

0

0

0

Upper San AndresLSA - Unit 3LSA - Unit 4

1878-2369 ft,2369-2562 ft,2562-2822 ft,

total salt thickness 160 fttotal salt thickness 75 fttotal salt thickness 124 ft


No. 1 1276 ft - 1322

No. 2No. 3No. 4

1140702

1718

ftftft

1186748

1764

ft - Upper Seven Rivers - did not producesufficient fluid.

ft - Salado - did not produce sufficient fluid.ft - Santa Rosa - did not produce sufficient fluid.ft - Queen/Grayburg - Formation press = 694 psi,

K = 1.56 md.ft - LSA - 4 - did not produce sufficient fluid.No. 5 2745 ft - 2792


e. Long-Term Pump Tsting and Fluid sampling - None.

f. Dissolution Zone water Well - None.

g. Hydrofracture Testing

Queen/Grayburg 1850-1858.5, Max. Horiz Stress = 1260 psi, Min. HorizStress = 1110 psi, orientation of fracture developedN300E

USA 2330-2338.5, fracture broke around packers, orienttionof fractures developed = N400E and N80°W

LSA - Unit 5

LSA - Unit 4

LSA - Unit 4

2430-2438.5, Min horiz Stress = 2915 psi, Vert. stress= 2780 psi, orientation of fracture developed = N600E

2581-2589.5, Min horiz stress = 3500 psi, Vert stress= 2950 psi, orientation of fracture developed = N600E

2790-2798.5, Max horiz stress = 2550 psi, Min horizstress = 1900 psi orientation of fracture developed =N45 0E

BXI-1369711-70/79 9

eVA4ZLv$vs (to)

REMOTE-SENSED IMAGERY

TYPE OF IMAGERY SOURCE DATA

1. LANDSAT/ERTS EROS DATA CENTER

Sioux FALLS, IA

BLACK AND WHITE

AND FALSE COLOR IMAGES,

DIGITAL TAPE, ALL

PANHANDLE

2. SLAR USGS IMAGES OR DIGITAL

TAPE, PLAINVIEW AND

CLOVIS QUADS

3. HIGH-ALTITUDE, BEG 1:80,000

QUAD-CENTERED, COLOR ALL PANHANDLE

INFRARED

4, LOW-ALTITUDE, BLACK USDA VARIOUS SCALES AND

AND WHITE, AERIAL VINTAGES, ALL PAN-

PHOTOGRAPHY HANDLE

5. LOW-ALTITUDE, BLACK

AND WHITE MOSAICS

TOBIN AERIAL

SURVEYS

SAN ANTONIO, TX

1:24,000

ALL PANHANDLE

TYPE OF IMAGERY SOURCE DATA

6. SHUTTLE IMAGING GODDARD SPACE 1:500,000

RADAR FLIGHT CENTER SELECTED AREAS

GREENBELT, MD

7. LOW-ALTITUDE, TEXAS NATURAL 1:20,000, SELECTED

COLOR INFRARED RESOURCE INFORMATION AREAS

SYSTEM, AUSTIN, TX

8. LOW-ALTITUDE

COLOR OBLIQUE

SLIDES

BEG SELECTED AREAS

REMOTE-SENSED IMAGERY

REGIONAL STUDY

1. FINLEY AND GUSTAYSON. 1981. LINEAMENT ANALYSIS BASED ON

LANDSAT IMAGERY, TEXAS PANHANDLE: GEOLOGIC CIRCULAR

81-5.

CONTENT:

LINEAMENTS, ALIGNED PLAYAS, SCARPS AND DRAINAGE SEGMENTS

WERE MAPPED FROM LANDSAT IMAGES AND COMPARED TO REGIONAL

FRACTURE TRENDS. FIGURES 1-5.

GROUND CHECK:

MOST LINEAMENTS CAN BE RECOGNIZED ON THE GROUND; HOWEVER,

THE CAUSE OF THE LINEAMENTS SUCH AS A SYSTEM OF FRACTURES

AT THE SURFACE, REMAINS ELUSIVE. FRACTURES ARE GENERALLY

ABSENT FROM THE BLACKWATER DRAW AND OGALLALA FORMATIONS.

l,II

IIr~~~~~~~~~

IIIIIIII

IIIIIIIIIII --

'- - -- I ........... . Big Sprang ' - N

_ - - - . .

20 0 20 40 60 80 100 km

20 0 20 40 60 so mi

Figure 1. Generalized frame boundariescoverage of the Texas Panhandle.

and aDproximate center points for Landsat

/I

I/\.ir I

: ',I "

I I S , � 2-I

N

0 25 StawteI Mes

0 25 Kdole,es

Figure 2. Lineaments derived from Landsat imagery, block 3 (fig.1 ), Texas Panhandleregion (Scene 1672-16455, May 26, 1974). Original imagery is at a scale of 1:250,000.

* . . **

r 0 5 10 15 miN 0 5 10 IS 20 km S PLAYA LAKE| conte., mlet~lto o lOteel

Figure 3 . Detail of lineaments mapped on Landsat imagery in the vicinity of PaloDuro Creek and Palo Duro Canyon. Linear stream segments and escarpments formmany of the lineaments. Area shown is A in figure 4. Original imagery is at ascale of 1:250,000.

/LINE AMENT

32°N

0 20 4C 60 80 100 20 mI

20 4C 60 80 -C i20 40 km

'G-, 0 ~iA ANT _aP

LOCAL STUDY

1. GUSTAVSON, T.C. AND OTHERS. 1982. EVAPORITE DISSOLUTION

AND DEVELOPMENT OF KARST FEATURES ON THE ROLLING PLAINS

OF THE TEXAS PANHANDLE: JOURNAL OF EARTH SURFACE

PROCESSES AND LANDFORMS, VOL. 7, P. 545-563.

CONTENT:

COMPARES ORIENTED SUBSIDENCE/COLLAPSE FEATURES,

IDENTIFIED FROM FIVE VINTAGES OF BLACK AND WHITE

AERIAL PHOTOGRAPHY, TO LINEAR DRAINAGE ELEMENTS,

OPEN EARTH FRACTURES, AND FRACTURES IN HALL COUNTY,

TEXAS. FIGURES 1-4.

GROUND CHECK:

SUBSIDENCE FEATURES, MOSTLY DOLINES, ARE EASILY

RECOGNIZED ON THE GROUND. DOLINE AXES AND THE ALIGN-

MENT OF A GROUP OF DOLINES ARE LOCALLY PARALLEL TO

A SERIES OF OPEN EARTH FRACTURES.

AA" CAPROCK ESCARPMENT

D SINKHOLESNO SINKHOLES O 30 60 mi

0 60 km

Figure 1. Study location and distribution ofsinkholes in the Texas Panhandle.

West

CASTRO CO I

ran i

SWISHER CO BRISCOE CO HALL CO

LEst

I CHILDRESS CO ! HARMON CO

i l zai 0 :

x

T. C. GUSTAVSON ET AL.

A972

1979 90 6

1940 195 1964, and99720 9 6

-id War S 3 0

Figure 3.Distribution of photographic data that were analysed. Colour slides, 1979; black-and-white stereographic photography,1940, 1950, 1964, and 1972

EVAPORITE DISSOLUTION AND KARST DEVELOPMENT

9

0

0

* ..~~~.........'U R KEY ............-- ::

::-::::--::- .. .. .................::...::::--::::-:-:.

S ::-::::::-:::::: :...^ ::-:-:-::-::............*5 * * :~~~~.-::::::::::._.

:-:-:::::::- :-::::

....... ......:: : ---::::.. -.:: :---::-:::....

Closed depression_ Sink

" FroctureEl No dato. o 4 8mi

o 4 8km

Figure 4. Location of sinkholes, closed depressions, and fractures in Hall and eastern Briscoe Counties. Closed depressions aredrawn to scale, sinkholes which are much smaller are not drawn to scale. Areas of no data are those areas for which coloured

slides were not available. These areas are relatively highly dissected and closed depressions do not occur there

N

CLOSED DEPRESSIONS,z75

NI0 Pervcm,

STREAM SEGMENTS

X ~~~~~~~~~~./:6657., _ D3P/9

-7

Figure 3.'. Diagrams indicate orientations of closed depressions and linear stream elements in Hall County. For each 1O' sector,linear data are plotted as a percentage of total number of closed depressions and as a percentage of total length of linear streamsegments, respectively

C 0cl",(v4U)

FRACTURE INVESTIGATIONS OF THE PALO DURO BASIN AREA

Eddie Collins. BEG

1. Regional fracture orientations -- figs. 2.3

- data collected in Permian and Triassic strata

- data includes joint strikes measured in outcrop and fracture

orientations measured from fracture identification logs

- data for each one degree by one degree quadrant has been plotted

together

- have plotted general fracture orientations and fracture

orientations that are significant at a 95% confidence level

- regionally, west-east striking fractures are signifcant in Permian

strata

Deaf Smith Co. also has NE striking fractures

2. Vertical and lateral continuity of fractures

2.1 Faults. folds, joints - figs. 4-6

- at western part of study area one signifcant joint set strikes NE,

parallel to the strike of the Alamosa Creek and Bonita Faults

- northeast of Deaf Smith Co.. joints were studied in Permian.

Triassic and Tertiary rocks at a flexure off the southwest flank of

John Ray Dome; at intervals along a traverse in the different age

1

strata. strikes of a representative joint from each set were

measured: data has been plotted in azimuth vs traverse distance

plots and rose diagrams: data show a well defined NW striking

joint set in the overlying strata, parallel to the flexure axis:

fracture spacing is closely spaced in Permian and Triassic

sandstones (5-8 joints across 1 m in 1-2 m beds): Tertiary

Ogallala strata also have a well defined NE striking joint set

2.2 Joint zones - fig. 7

- in relatively undeformed strata. zones of closely spaced joints

extend vertically through Permian and Triassic strata: these joint

zones range in width from 10 to 40 m and have been traced laterally

up to 1 km

2.3 Joint spacing vs bed thickness - fig. 8

- the number of joints across two meters were measured for sandstone

beds of different thicknesses: figure 8 shows plotted data

2.4 Lateral variability of joint orientations - figs. 9. 10

- strikes of vertical gypsum-filled joints in Permian strata were

measured along three traverses at Palo Duro Canyon State Park:

data are plotted in azimuth vs traverse distance plots and rose

diagrams

- data show well defined E-W striking joints throughout the area:

most of the joints strike NNW at the northern traverse (fig. 10):

2

the middle traverse (traverse 2) shows the strikes of the NNW

oriented joints drift northwestward and NW striking joints become

most common

3. Preliminary evaluations of fractures and veins in the core

3.1 General occurrance of fractures and veins - figs. 11-13

- core show that Permian strata are cut by gypsum. halite, anhydrite.

and calcite veins, as well as fractures with no mineral filling:

most of the fractures without mineral fillings are the result of

drilling coring. however some are thought to be natural

- for this study the strata has been grouped into three categories

based on lithology and stratigraphic sequence: the categories are

(1) strata below salt units. (2) strata that contain bedded halite.

and (3) deformed strata above the salt units (salt dissolution

zone)

- based on the core descriptions, the percentage of fractured core

for each category has been determined by dividing the number of one

foot core intervals containing fractures by the total core footage

- data show that strata above the bedded halite units are more

fractured than the salt zone units: the salt zone unit category

contains the lowest percentages of fractured core: for strata

below the bedded halite units, core from the Mansfield well located

on the Bravo Dome has the greatest percentage of fractured core

3

3.2 Gypsum veins (core and outcrop) - figs. 14- 27

- strata overlying salt units commonly have vein fillings of gypsum

- core and outcrop studies show gypsum veins are common in a

deformed strata zone

- veins are composed of fibrous gypsum bisected by a medial scar;

they are thought to be antitaxial crack-seal veins (Ramsay and

Huber. 1983); the medial scar marks the site of earliest

mineralization with new material added at the vein - wall rock

contact: the mineral fibers indicate the direction of maximum

principal extension at the time they were added to the vein

-gentle subsidence and collapse is thought to have opened the gypsum

filled fractures

3.3 Halite veins - figs. 28-32

- fibrous halite veins fill fractures in bedded units

- veins occur within mudstone. siltstone. and carbonate interbeds

- some veins exhibit a subpolygonal pattern on bedding planes; these

may have a desiccation or synaeresis related origin

- some veins exhibit a postcompactional origin they are eliptical

in shape and do not exclusively V" downwards: fracture filling is

not zoned and contains no silt or mud filling: crosscutting

relationships show that many veins postdate compaction and

cementation

3.4 Veins and fractures below halite units - fig. 33

4

- calcite and anhydrite veins are present as well as fractureswithout mineral fillings

3.5 Fracture orientations in Deaf Smith Co. - fig. 34- fracture orientations have been interpreted using fracture

identification logs: these logs have limitations: data showwestward and northeastward fracture orientations

5

Il

Ne"M f..

D. 1'.

+

411E

+ t

I-H -H~~~~~~~~~~~~~~~~~~

r

14

i

It

i

4

i

I

I.

II

I

I

a I

Palo

E'�' 5; n

a

a

+1-

-H--

-I V,.

tI

It..

00 ,

&%I1Sa

V -b:/ /0of the various methods in recognizing these features. e. Modelling of gravity and magnetic...

Documents

Transcript of V -b:/ /0of the various methods in recognizing these features. e. Modelling of gravity and magnetic...