GEOCENTER LP

LAND PROCESSING

Step 2

Step 4

Step 5

Step 6

Step 3

Step 1

SeisUP ®

“AGLEN” Dataset

Land Processing

Building the Data Base

• Create “STATION “ and “SOURCE”

• Qc : Execution listing from each run

• Qc :“FOLD” AND “XYMAP” modules

Loading Data ~ begin Processing

• SEGYREAD to WRITE (GCI internal format)

Geometry

• READ + GEOM + SELECT + WRITE

Geometry Q.C.

• READ + GEOMCHK + QCVIEW

• READ + STATIC + DISPLAY

SeisUP ® “AGLEN” Dataset

Land Processing (Step 1)

“QCVIEW”

Display of amplitude file created with “GEOMCK”

module

EDIT DATA

• READ + LAP+ SGN3 + RLIV(2) + SPIKEDIT + LENGTH + FKFILTER +

WRITE

• READ + STATIC + FILTER + TVEQ + CVA2D

• GEOVEL (interactive velocity analysis)

• After velocities have been picked ready for step 3.

Creating “EDIT DATA”

• READ + LAP+ SPIKEDIT + SGN1 +SGN2

( THIS PROCESS PERFORMED TO DERIVE GAIN CURVES AND AUTOMATIC DELETE

BAD TRACES)

• READ + LAP + SGN3 + SPIKEDIT + FKFILTER

•GEOVEL (interactive velocity analysis)

• PLEASE NOTE THAT THERE ARE SEVERAL RUNS ATTACHED TO THE” GEOM” DISC

FILE. THESE RUNS ARE QC RUNS TO ANALYSIS THE EFFECTS OF ALL THE

STEPES BEING APPLIED TO CREATE THE “EDITDATA” DISC FILE.

• THERE ARE TREMENDOUS AMOUNT OF SPIKES AND LATERAL NOISE THAT IS NOT

SOURCE OR SURFACE RELATED. THE DATA SET HAS BEEN PROCESSED WITH MINIMAL

AMOUT OF EDITING (DUE TO TIME CONTRAINTS.

• IT WOULD BE EXTREMELY IMPERATIVE THAT MORE EDITING BE PERFORMED. DATA QUALITY WOULD THEREFORE BE

IMPROVED.

PLEASE REVIEW FOR FINAL

QC “geom” DATA

GEOM DATA

• SURFACE CONSISTENT GAIN ANALYSIS (SGN1&2)

• APPLY GAIN AND EDIT OPTION WITH SGN3

MODULE

EDIT DATA

QC DATA ~ READ + DISPLAY

SeisUP ® “AGLEN” DatasetLand Processing (Step 2)

Raw Record

SGN1-2

+

LAP

SGN1-2

+

LAP

SGN1-2

+

LAP

+

FK-FILTER

RAP BRUTE STACK

( NO DECON)

AGC BRUTE STACK

( NO DECON)

VELOCITY ANALYSIS

SURFACE CONSISTENT DECON DATA

(CONTINUE TO STEP 4)

QC DATA

AUTO STATICS

(DOUBLE PASS)

NMO GATHER

VELOCITY ANALYSIS WITH AUTOSTATICS

AUTO STATICS STACKS

AUTO STATICS + SURFACE CONSISTENT

DECONQC STACKS

SeisUP ® “AGLEN” DatasetLand Processing (Step 3)

RAP AUTOSTATICS STACK

AGC AUTOSTATICS STACK

RAP AUTOSTATICS STACK + FXDN

AGC AUTOSTATICS STACK + FXDN

SURFACE CONSISTENT DECON DATA

Decon Stack

QC Display's

(with & without FXDN)

Surface Consistent

“SGNE1”

(OFFSET)

Surface Consistent

“SGN1-2”

(Analysis)

Final Surface Consistent Gain Data

QC Display's

(without FXDN)

Gain Application Modules

SGNE2

SGN3

QC STACK

QC STACK

&

DISPLAY

INPUT DATA SET FOR STEP

5

SeisUP ® “AGLEN” Dataset

Land Processing (Step 4)

RAP AUTOSTATICS + SURFACE CONSISTENT DECON + STACK + FXDN

AGC AUTOSTATICS + SURFACE CONSISTENT DECON + STACK + FXDN

Final Surface Consistent Gain Data

FINAL GATHER QC

FOR

FINAL STACKS

&

PRE-STACK TIME MIGRATIONS

(KTMIG)

(continue to step 6)

FINAL STACK

FOR

POST STACK TIME MIGRATIONS

(FXMIG, FKMIG, AND KTMIG)

(continue to step 6)

SeisUP ® “AGLEN” Dataset

Land Processing (Step 5)

POST STACK TIME MIGRATIONS

(FXMIG, FKMIG, AND KTMIG)

“VIP”

Smoothing final velocity for migration

queue’s

Final Gather

For

Pre-Stack Migration (KTMIG)

KTMIG (pre-stack)

PSTM STACK

FINAL QC DISPLAY

SeisUP ® “AGLEN” Dataset

Land Processing (Step 6)

POST STACK FX-MIG – RAP STACK

POST STACK FK-MIG – RAP STACK

POST STACK KTMIG – RAP STACK

PSTM – KTMIG – AGC STACK

SeisUP ®

“AGLEN” Dataset

Land Processing

Entire Processing Flow(Steps 1-6)

GeoCenter LP has made every effort to ensure the accuracy of the information herein. However, appropriate information

sources should be consulted, especially for new or unfamiliar processing procedures. It is the responsibility of the

processing geophysicist to evaluate and conclude his/her own opinion to the context of the material presented.

Justin HerseyBusiness Development

Email: jhersey@geocenter.com