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© 2014 TGS-NOPEC Geophysical Company ASA. All rights reserved.

See energy defined. Blanchard 3DMULTI-CLIENT ONSHORE SEISMIC GRADY AND MC CLAIN COUNTIES, OKLAHOMA

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Blanchard 3DTGS-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*

Surface Area 433 mi2

Receiver Interval 220 ft

Source Interval 220 ft

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

*Pricing available upon request

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Blanchard 3DPROCESSING PARAMETERS

Time Pre-Processing

� Input SEGD data

� Minimum phase conversion

� Merge navigation with seismic trace headers

� Geometry QC, trace edits

� Output geometry shot ordered tapes

� Refraction statics

� Velocity analysis

� Residual statics (first pass)

� Spherical divergence correction

� Surface consistent amplitude compensation

� Noise attenuation, shot domain

� Surface consistent amplitude compensation

� Surface consistent deconvolution

� Velocity analysis

� Residual statics

� Residual noise attenuation

� Surface consistent amplitude compensation

� Trim Statics

� Output pre-processed data with refraction and reflection statics stored in trace headers

Post Stack Time Migration and Post Stack Processing

� Kirchhoff pre-stack time migration velocity analysis (2 passes)

� Output migration velocities

� Kirchhoff pre-stack time migration

� Output raw migrated gathers with NMO

� Mute and stack

� Output raw migration stack

� Apply filter and scale

� Noise reduction and footprint attentuation

� Output processed migration stack

Deliverables

� Raw field data / shot ordered (SEGD)

� Field data with geometry and XY coordinates in the trace headers/shot ordered (2 ms unedited)

� Preprocessed data –with refraction and reflection statics stored in trace headers (CDP sorted)

� Pre-stack time migrated CDP gathers with NMO

� Processed migration

� Raw migration

� Migration Velocities

� 3D migration velocity trace volume

� Processed land source-receiver navigation – (SPS)

� Data processing final report

Depth Imaging (Optional)

� Build initial vertical velocity model by calibrating PSTM velocities with checkshots

� Remove long wavelength statics from data and move data to acquisition datum

� Kirchhoff depth migration

� Estimate anisotropic parameters (delta and epsilon)

� Three iterations of PSDM and tomography

� Final iteration of PSDM and tomography (if required)

� Final VTI Kirchhoff PSDM

� Output depth gathers with NMO

� Residual moveout

� Output depth gathers with NMO

� Stack

� Output raw migration stack

� Noise removal (f-k power or fxy decon)

� Amplitude balance and TVF

� Footprint removal

� Output processed migration stack

Deliverables

� Depth Raw Migration Gathers with NMO

� Depth Processed Migration Gathers with NMO

� Pre-Stack Raw Depth Migration Stack

� Pre-Stack Processed Depth Migration Stack

� Final Interval Velocity Model

� Final Delta & Epsilon models

Optional Products

� LAS well logs

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© 2014 TGS-NOPEC Geophysical Company ASA. All rights reserved.

For more information, contact TGS at:

US Tel: +1 713 860 2100

Email: info@tgs.com

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