3c Proposal 1

8/12/2019 3c Proposal 1

1/14

A Brief Introduction

For

Multi-Component Seismic Data Processing

ubmitted byBGP Jakarta Data Processing Center

January 16, 2006

Data Processing Center Page 1

8/12/2019 3c Proposal 1

2/14

1. Introduction

BGP Jakarta Data Processing Center is fully supported by Geophysical Research

Institute (GRI) of BGP, China GRI is a reputed international Geophysical ser!ices

co"pany ha!ing !ery sound research and de!elop"ent background in Geophysical

industry It has e"ployed and de!eloped highly ad!anced technologies and therefore

has beco"e a #orld le!el ser!ice and research co"pany in geophysical prospecting

industry

$he data #as processed using PR%&',G%DP$* and GRI++ as the "ain

Geophysical application processing soft#are (!ersion -.), #hich #as de!eloped by

GRI of BGP In addition to GB++ seis"ic processing soft#are for pre/stack ti"e

"igration de!eloped by Globe Co"pany of *ouston 0+' is also a!ailable $he

seis"ic application soft#are package is co"prised of se!eral geophysical data

processing "odules, #hich are capable of undertaking full 1D and 2D interacti!e and

batch processing functions


Since 1983 BGP has experimented and developed multi-componenttechnology !his expertise has evolved into a series o" integratedtechni#ues $hich have %een tested and have proved to %e relia%le suite o"exploration and development seismic services

&ntegrated !echni#ues

' component processingStaticsPre-stack noise attenuationSurface consistent processingVelocity analysis, NMO, stackImaging

' component processingStaticsPre-stack noise attenuationSurface consistent processingVelocity analysis, NMO, stackImaging

()* component processingS wave staticsCCP binningP-SV velocity analysisP-SV wave NMOP-SV wave imaging!traction of attributes

()* component processingS wave staticsCCP binningP-SV velocity analysisP-SV wave NMOP-SV wave imaging!traction of attributes

8/12/2019 3c Proposal 1

3/14


%e"ore

a"ter

S-$ave Statics

8/12/2019 3c Proposal 1

4/14

Data Processing Center Page

Conventional +, +on-hyper%olic +,Super gather

PS. +,

8/12/2019 3c Proposal 1

5/14

Data Processing Center Page !

P-P

PSV

/ithology prediction using .p0.s ratio

Gas-%earing sandstone

inal processing results

8/12/2019 3c Proposal 1

6/14

2. 3 Component Seismic Data Processing

1. "e#uired input data

3e #ill re4uest C%&P'5 #ith the follo#ing data6

1D 2C 7ield seis"ic tapes (!ibroseis correlated) and additional data (obser!erreport, coordinates and ele!ations (+P+), uphole data)

P/#a!e !elocity "odel fro" anisotropic pre/stack ti"e or depth "igration of

P/P #a!e data (depth "aps, !elocity file, 8$I para"eters)

7inal processing results of P/P #a!e data

3ell data

%ther data re4uired for data processing

2. Pre-Processing and Preparations

9 Data loading2 +hot gathers and all near traces display

1 Geo"etry updating6 $he geo"etry can be defined #ith +P+ file $he linear

5&% and shot gathers displays #ill be perfor"ed to check the result of the

defined geo"etry

2 Co"ponent separation6 8, *9, *1

: Construction of a 8p;8s (9/D) background "odel fro" 8+P and;or #ell log

data

3. P-P $a%e Processing

8/12/2019 3c Proposal 1

7/14

. Poststac' processing (for PP and PS)

12 Decon!olution after stack >C products

1: $i"e !ariant filter >C products

1C products

1- 7/ decon!olution1= $i"e !ariant gain >C products

1? Phase analysis, phase shift6 ero/phasing filter to be deri!ed statistically or by

"atching the seis"ic to a supplied #ell reflection series >C products

1@ Generation of final deli!erables

!. P-S $a%e Processing

7or the processing of the horiontal co"ponents, a "odification of the P/P #a!e

processing #ill be applied Differently fro" P/P #a!e processing there are no

restrictions of "ai"u" offset or trace length (data as ac4uired shall be used)

'dditional steps or "odifications of steps are6

2. Restriction of "ai"u" offset to < k"

29 5egati!e offset polarity re!ersal, re!erse trace analysis and correction +hot

gathers and all near traces #ill be displayed &aps sho#ing the a"plitude of

the signal and noise at !arious ti"es in the data set

21 Rotation analysis and tests >C products

22 P/#a!e and +/ #a!e static >C products

2: 7irst Break Picking ("anually and;or auto"atically), Refraction +tatic

Co"putation and Refraction +tatic 'pplication >C products

2C products

2- CCP operations instead of C&P operations >C products

2= In!erse >s filter >s to be calculated by esti"ating the spectral change #ith

different ti"e +uited >C plots for testing and application

2? %ffset separation (positi!e and negati!e offsets) prior to P+$&

2@ Airchoff pre/stack ti"e "igration( para"eter tests, >C plots)

:. 5&% in!erse using Airchoff

:9 P+$& !elocity analysis

:1 Airchoff pre/stack ti"e "igration

:2 5&% in!erse

:: *igher order 5&%, "ute and +tack

&. 0ptional + additional Processing

:C products

:- *igher order non/hyperbolic 5&% corrections >C products

:= $ri" statics >C products

:? 7D &igration #ith P+ a!erage !elocities (1E8p8s;(8pF8s)) >C products

:@ Generation of +P+

8/12/2019 3c Proposal 1

8/14

"ethod to be applied +uited >C products6 prestack and stack gathers before ;

after

8/12/2019 3c Proposal 1

9/14

. /,e Proposed Flo C,art of t,e 2D Seismic Data Processing

81 P-P 2ave Basic Processing Se#uence

Demultiplexing

Shot Gathers Display

Geometry pdate

Sort to .ertical Component

4dit %ad traces0shots) de-spi5ing

4levation Static Correction

irst Brea5 Pic5ing) 6e"raction Static Correction

Spherical Divergence Correction

Sur"ace consistent amplitude compensation

Sur"ace consistent deconvolution

Sort to C,P gather

irst pass velocity analysis 7every m: and stac5

irst Pass Sur"ace Consistent 6esidual Statics Correction

Predictive Deconvolution or &nverse ;-"ilter

Second pass velocity analysis 7every

8/12/2019 3c Proposal 1

10/14

-( deconvolution

Post-stac5 Deconvolution

!ime variant "ilter

Scaling

inal 6esult


8/12/2019 3c Proposal 1

11/14

8< P-S 2ave Basic Processing Se#uence

Demultiplexing

Shot Gather and +ear ""set Display

Geometry pdate

irst Brea5 Pic5ing) 6e"raction Static Correction

Sort to ?ori@ontal Component

Construction o" a .p0.s

+egative o""set polarity reversal) reverse trace analysis and correction

6otation analysis and tests

PS static application

4dit %ad traces0shots) de-spi5ing

= ilter at Shot06eceiver Domain7ptional:

Spherical Divergence Correct

Sur"ace consistent amplitude compensation

Sur"ace consistent deconvolution

Sort to CCP

CCP velocity analysis 7every m: and stac5

1stSur"ace Consistent 6esidual statics Correction

Predictive Deconvolution or &nverse ;s-"ilter

8/12/2019 3c Proposal 1

12/14

!hird Pass .elocity >nalysis

=irchho"" Pre-stac5 !ime ,igration

+, &nverse and S4G* 6>2 PS!, Gather

+,) ,ute and Stac5

-( deconvolution

Post-stac5 Deconvolution

!ime variant "ilter

Scaling

inal 6esult

4. 6e7 processing tec,ni#ues for Multi-Component Seismic Data

Automatic *p+*s Pic'er

Co-Sensor Interpolation

Co-Sensor Sum

Common Con%ersion Point (CCP) Binning

Multi-Component Cross-8#uali9ation

S-$a%e 2-Component "otation

*p+*s Computation

*p+*s Correlation

*p+*s /ransform

P-S% PS/M

P-S% DM0

15. 6e7 Processing /ec,nic Description

Common Con%ersion Point (CCP) Binning

Pre/stack P/+ con!erted #a!e data are rebinned to co""on con!ersion point (CCP)

location instead of co""on "idpoint (C&P) location for subse4uent processing ach

input trace is seg"ented into user/specified ti"e #indo#s that are indi!idually

rebinned and output as ne# traces 8elocity "anager for"atted files of !elocities and

of 8p;8s ratios are re4uired

Multi-component Cross-8#uali9ation

7or land and "arine "ulti/co"ponent data, this "odule cross/e4ualies the a"plitude

and phase spectra of the horiontal detector co"ponents for opti"al !ector #a!efield

processing, including co"bination (rotation) using the +/3a!e 1/co"ponent Rotation"odule $he !ertical detector co"ponent "ay be included in the co"putation and


8/12/2019 3c Proposal 1

13/14

"ay also be corrected to re"o!e spurious +/#a!e energy

S-$a%e 2-Component "otation

7or land and "arine "ulti/co"ponent data, the horiontal detector co"ponents of

shear/#a!e data are rotated to obtain the desired #a!efield $he data "ay be rotated

to the source/detector direction, a co""on direction, or back to the original directionIf the original field orientations of the horiontal co"ponents are not kno#n, they

"ay be calculated so that subse4uent rotation can be perfor"ed

*p+*s /ransform

+tacked co"pressional/#a!e, con!erted/#a!e, or shear/#a!e reflection data t#o/#ay

tra!elti"es are transfor"ed to t#o/#ay tra!elti"es of a different type By correlating

a transfor"ed !ersion of one #a!e type to a recorded !ersion of that #a!e type, an

analysis of the ratio of co"pressional/#a!e !elocity (8p) to shear/#a!e !elocity (8s)

can be "ade $his can aid in the interpretation of lithology and fluid properties fro"

seis"ic data Input data is post/stack and trace selected as re4uired %utput can be a

transfor"ed stack fro" a!erage 8p;8s function or a set of transfor"ed gathers, useful

for 8p;8s correlation analysis ' co"plete input trace or a single #indo# of data can

be transfor"ed

P-S* DM0

P/+8 D&% is perfor"ed #ith a space/ti"e (/t) Airchhoff algorith" $he input data

are co""on/offset gathers #hich ha!e not been 5&% %utput obtained that consists

of co""on/offset gathers #hich approi"ate P/P data in an e4ui!alent !elocity

"ediu" 'dditional processing, such as a residual 5&% correction, is typically

re4uired after applying this process

11. Final Products

+G tapes of the PP and P+ final stack and "igration

+G tapes of final filtered ero/phased PP and P+ "igration

PP and P+ P+$& or D&% gather tapes in +G

PP and P+ stacking and "igration !elocities in '+CII for"at

+G tape of final 8p;8s sections

7inal report (2 paper copies plus 2 CDR%& PD7 file copies)


8/12/2019 3c Proposal 1

14/14


3c Proposal 1

Documents

Transcript of 3c Proposal 1