Fracture Research and Application Consortium Selected Overview Slides 2005
description
Transcript of Fracture Research and Application Consortium Selected Overview Slides 2005
ofBureau
EconomicGeology
Fracture Research and Application Consortium
Selected Overview Slides 2005 http://www.beg.utexas.edu/indassoc/fraccity/public/recntevnt.htm
Austin Texas
Fracture Research & Application Consortium 2
ofBureau
EconomicGeology
Agenda
• Introduction• Models to Flow Simulation• Introduction to Characterization Methods• Discussion
Fracture Research & Application Consortium 3
ofBureau
EconomicGeology
FRAC GoalsFracture Research and Application Consortium
• Verifiable conceptual fracture models• Accurate pre-drill predictions• High-resolution, site-specific evaluation • Proven economic impact
– Exploration: risk assessment– Production: reservoir simulation
Fracture Research & Application Consortium 4
ofBureau
EconomicGeology
Benefits of Membership I
• Opportunities for collaborative projects– Case studies
• Fracture Research & Application Consortium– We are committed to developing useful tools
• Accessible, proven value, unique
• Access to cutting-edge research as it happens– Website & FTP site, software
Fracture Research & Application Consortium 5
ofBureau
EconomicGeology
FRAC Website private sidehttp://www.beg.utexas.edu/indassoc/fraccity/index.htm
Username: DevonEnergyPassword: FracIA16Note these are case sensitive
Fracture Research & Application Consortium 6
ofBureau
EconomicGeology
Shared Case Study Data
Fracture Research & Application Consortium 7
ofBureau
EconomicGeology
Reports, manuscripts, abstracts
Fracture Research & Application Consortium 8
ofBureau
EconomicGeology
Glossary
Fracture Research & Application Consortium 9
ofBureau
EconomicGeology
Application
Fracture Research & Application Consortium 10
ofBureau
EconomicGeology
Benefits of Membership II
• Annual research meeting & field trips• Company office visits & short courses• Company staff training in Austin• Longstanding committed membership• Leveraged research
– DOE, NSF– Jackson School Geology Foundation
Fracture Research & Application Consortium 11
ofBureau
EconomicGeology
Members2005 Fracture Research & Application Consortium
Petroleum & Geosystems Engineering – Geological Sciences – Bureau of Economic GeologyThe University of Texas at Austin
IMP
Shell International E & P
Huber
Anadarko
Fracture Research & Application Consortium 12
ofBureau
EconomicGeology
UT Researchers Associated with FRAC
Petroleum & Geosystems Engineering – Geological Sciences – Bureau of Economic GeologyThe University of Texas at Austin
Lake Olson Marrett Lander Bonnell Sen
Gale Reed Laubach Milliken Srinivasan Holder Fomel
Geocosm Geocosm UTIG
Fracture Research & Application Consortium 13
ofBureau
EconomicGeology
Why a new approach is needed Fracture prediction & evaluation
• Inherent sampling limitations• Unconstrained models
– Predictions difficult to verify– Predictions do not extend to key attributes
• Intensity, Clustering, Are the fractures open?
• Predrill and interwellbore extrapolation– Unacceptable uncertainties
Fracture Research & Application Consortium 14
ofBureau
EconomicGeology
Challenges Fracture Prediction & Evaluation
Unconstrained models
• EquifinalityEquifinality
• Predictions difficult to verifyPredictions difficult to verify
Frontier Formation, Wyoming
Challenges Fracture Prediction & Evaluation
• Inherent sampling limitations
Hypothetical well bore
Example of difficult-to-measure attributeOpen Fracture Length Distribution
Fracture Research & Application Consortium 16
ofBureau
EconomicGeology
FRAC Approach
• Exploit links between chemical, mechanical processes– More accurate predictive models– Measure attributes not otherwise obtainable– Quantitative, site-specific, low-cost data not
limited by conventional sampling problems– Map attributes; calibrate seismic data;
incorporate results in simulators
Fracture Research & Application Consortium 17
ofBureau
EconomicGeology
Research Approaches
Fracture Research & Application Consortium 18
ofBureau
EconomicGeology
Conceptual Approach of FRAC
Production:ReservoirSimulation
Microstructure(Laubach) Structural surrogates
Geo
mec
hani
cs(O
lson)Scaling
(Marrett)
Reservoir quality
Exploration:Risk
AssessmentQuality, Orientations, Timing,
Apertures, Lengths,Spacings, Geometry
Predict Attributes of Large Fractures and Fracture Arrays
Quantitative Quantitative Structure Structure
Geomechanics Geomechanics DiagenesisDiagenesis
Linked ModelsLinked Models
Fracture Research & Application Consortium 19
ofBureau
EconomicGeology
Fractures Across a Range of ScalesFRAC Research Covers this Scale Range
Outcrop
cms
Logs
mm
Core
< mm
Thin section
0.5 mm
SEM
ms
Seismic
mdm
Fracture Research & Application Consortium 20
ofBureau
EconomicGeology
Predictions of Fracture ClusteringThree maps of fracture trace patterns
- 1 0
- 8
- 6
- 4
- 2
0
2
4
6
8
1 0
- 8 - 6 - 4 - 2 0 2 4 6 8
n = 5
- 1 0
- 8
- 6
- 4
- 2
0
2
4
6
8
1 0
- 8 - 6 - 4 - 2 0 2 4 6 8
n = 2 0
- 1 0
- 8
- 6
- 4
- 2
0
2
4
6
8
1 0
- 8 - 6 - 4 - 2 0 2 4 6 8
n = 8 0
n=5 n=20 n=80
•low n, spacing < bed thickness, early subcritical growth•high n, widely spaced clusters, late critical growth
n is subcritical index (n) a rock property that can be used to predict network geometry
Note changes in degree of fracture clustering
Arr
ow in
dica
tes
bed
thic
knes
s fo
r the
se m
odel
s
Fracture Research & Application Consortium 21
ofBureau
EconomicGeology
Case Studies• Key element of FRAC• Objectives
– Advance research– Transfer technology
• New structure starting in 2005– Aim: Service to Members– Structure under development– Made possible in part by JSG initiative grant