Aquisition Parameters | Processing Parameters | Data Sets | PDF
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Aquisition Parameters
Acquired Date: 16 Aug – 19 Oct 2001
Acquired By: Grant Geophysical (crew 350)
Template: Split-spread Slant @ 1760ft source line interval firing into
ten 144ch receiver lines every 1760ft
System: I/O RSR / RSI
Energy Source: Biodegradable Geoprime; 5.5lbs @ 90ft
Source Interval: 220ft (~8,640 total) E-W
Receiver Interval: 220ft (~8,640 total) NNW-SSE
Nominal Max Offset: 15,730ft
Nominal Fold: 45
Acquired Bin Size: 110x110ft
Record Length: 8sec @ 2ms (SEG-Y Geometry Merge data @ 4ms)
Processing Parameters
PreStack Time Migration (Geotrace Jan 2002)
Reformat & resample to 4ms
Geometry verification
Trace edits
Spherical divergence & gain
CMP Sort (110x110’ bin)
Surface Consistent Deconvolution
a. 240ms operator
b. Spiking
c. 2 gate
Datum Statics (sea level @ 5,500ft/sec)
NMO / Surface consistent statics - 1st pass
NMO / Surface consistent statics – 2nd pass
TFD noise reduction; shot domain
AGC 1500ms
PreStack Time Migration velocity analysis @ 1⁄3 mi interval (2 iterations)
PreStack Time Migration
a. 15,000ft aperture
b. 6sec output
Stack
Time Variant Filter
0.0-2.0sec 4-8-60-65Hz
3.0sec 4-8-40-45Hz
4.5sec 4-8-30-35Hz
AGC 1500ms
Noise reduction (SNIP)
PreStack Time Migration (Generation Services May 2002)
Flow currently unavailable
Available Data Sets
PreStack Time Migration (Geotrace Jan 2002)
Full offset stack – enhanced (SEG-Y)
Velocities (ASCII)
PreStack Time Migration (Generation Services May 2002)
Full offset stack – enhanced (SEG-Y)
PrSTM gathers (SEG-Y)
56 fold max
660-27070ft @ variable intervals (550, 450, 660x9, 550, 440x43)
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