This document describes the acquisition and processing parameters for a multi-client 3D seismic survey covering 433 square miles in Grady and McClain Counties, Oklahoma. The survey utilized vibroseis and dynamite sources with receiver and source intervals of 220 feet. Processing included pre-stack time and depth migration, velocity analysis, multiple attenuation, and stacking to produce final processed time and depth volume deliverables. Optional products included the delivery of well log data.

1. See energy defined.
Blanchard 3D
MULTI-CLIENT ONSHORE SEISMIC
GRADY AND MC CLAIN COUNTIES, OKLAHOMA
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© 2014 TGS-NOPEC Geophysical Company ASA. All rights reserved.

2. *Pricing available upon request
Surface Area 433 mi2
Receiver Interval 220 ft
Source Interval 220 ft diagonal
Receiver Line Spacing 880 ft
Source Line Spacing 1,100 ft
Rx Line Orientation E-W
Bin Size 110 x 110 ft
Source Type Vibroseis with dynamite infill
Template 32 lines live x 130 stations
Nominal Fold 208
Maximum Offset 19,913 ft
Record Length 5 seconds
Sample Rate 2 ms
Blanchard 3D
TGS-NOPEC has used its best efforts to produce this map free of errors, utilization of same shall be at the sole risk of the user. TGS-NOPEC assumes no liability or responsibility for reliance placed thereon.
ACQUISITION PARAMETERS*
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© 2014 TGS-NOPEC Geophysical Company ASA. All rights reserved.

3. Blanchard 3D
Pre-Processing
ƒƒ
Geometry QC
ƒƒ
Trace edit
ƒƒ
Noise attenuation in shot domain
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Surface consistent amplitude compensation
ƒƒ
Refraction statics
ƒƒ
Spherical divergence correction
ƒƒ
Noise attenuation in CDP domain
ƒƒ
Velocity analysis
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Surface consistent decon
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Residual de-noise (if required)
ƒƒ
Second pass of surface consistent amplitude compensation (if required)
ƒƒ
Reflection statics
ƒƒ
Velocity analysis
ƒƒ
Second pass of residual statics (if needed)
ƒƒ
Second pass velocity analysis (if needed)
ƒƒ
Output pre-processed data with refraction and reflection statics stored at trace headers
Time Imaging
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Pre-stack time migration velocity analysis (2 passes)
ƒƒ
Output migration velocities
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Kirchhoff pre-stack curved ray migration
ƒƒ
Output raw migrated gathers without NMO
ƒƒ
Continuous high-resolution velocity and ETA analysis
and application
ƒƒ
Output high resolution velocity field
ƒƒ
Radon multiple attenuation
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Residual de-noise (if required)
ƒƒ
Output processed migrated gathers with NMO
ƒƒ
Mute and stack
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Output raw migration stack
ƒƒ
Filtering and scaling
ƒƒ
Noise reduction and footprint removal
ƒƒ
Output processed migration stack
Deliverables
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Pre-processed data
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Raw Time Migration Gathers with NMO removed
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Processed Time Migration Gathers with NMO
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Pre-Stack Raw Time Migration Stack
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Pre-Stack Processed Time Migration Stack
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Migration Velocities
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High Resolution RMS Velocity Field
Depth Imaging (Optional)
ƒƒ
Build initial vertical velocity model by calibrating PSTM velocities with checkshots
ƒƒ
Remove long wavelength statics from data and move data to
acquisition datum
ƒƒ
Kirchhoff depth migration
ƒƒ
Estimate anisotropic parameters (delta and epsilon)
ƒƒ
Three iterations of PSDM and tomography
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Final iteration of PSDM and tomography (if required)
ƒƒ
Final VTI Kirchhoff PSDM
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Output depth gathers with NMO
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Residual moveout
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Output depth gathers with NMO
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Stack
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Output raw migration stack
ƒƒ
Noise removal (f-k power or fxy decon)
ƒƒ
Amplitude balance and TVF
ƒƒ
Footprint removal
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Output processed migration stack
Deliverables
ƒƒ
Depth Raw Migration Gathers with NMO
ƒƒ
Depth Processed Migration Gathers with NMO
ƒƒ
Pre-Stack Raw Depth Migration Stack
ƒƒ
Pre-Stack Processed Depth Migration Stack
ƒƒ
Final Interval Velocity Model
ƒƒ
Final Delta & Epsilon models
Optional Products
ƒƒ
LAS well logs
PROCESSING PARAMETERS
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© 2014 TGS-NOPEC Geophysical Company ASA. All rights reserved.

4. US
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Email: info@tgs.com
For more information, contact TGS at:
TGS Available Standard Delivery LAS
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© 2014 TGS-NOPEC Geophysical Company ASA. All rights reserved.
TGS Available Immediate Delivery LAS