| No. |
Processing History |
Line 15A |
| 1 |
Format Conversion |
SEG-Y to WGC code 4; Data correlated in field |
|
Record Length |
6 s |
|
Sample Interval |
0.002 s |
| 2 |
Geometry and Field Statics |
Yes |
| 3 |
CRP Sort |
Crooked profile adjustment |
|
Bin Width |
200 m |
| 4 |
Amplitude Compensation |
Geometric spreading using a regional velocity function |
| 5 |
Deconvolution |
Minimum phase inverse filter |
|
Autocorrelation: |
|
|
Near Trace Start Time |
0.5 s |
|
Linear Start Time Velocity |
2500 m/s |
|
Stop Time |
5.9 s |
|
Number of Windows |
4 |
|
Average Window Length |
1.8 s; Overlap: 33 % |
|
Prediction Distance |
0.002 s |
|
Operator Length |
0.12 s |
|
Pre-Whitening |
0.1 % |
|
Trace Balance Window |
1-3 s |
| 6 |
Residual Statics |
Yes |
|
Surface Consistent Statics |
Miser (automatic) |
|
Window |
0.5-2.5 s |
|
Maximum Shift |
+/- 0.02 s |
|
Shot and Receiver Statics Corrections |
Yes |
| 7 |
Velocity Analysis |
Picked by Lithoprobe personnel |
|
Constant Stacks |
Yes |
| 8 |
Filter |
Surgical 60 Hz lo-cut filter |
|
Offset/Time |
(0 m: 0-0.5 s); (2253 m: 0.85-1.35 s) |
| 9 |
Amplitude Equalization |
AGC |
|
Window Length |
1 s |
| 10 |
Editing |
Trace edits (picked by Lithoprobe personnel) |
| 11 |
NMO Corrections |
Yes |
| 12 |
Mute |
Picked by Lithoprobe personnel |
|
First Break |
Using raw shot records |
| 13 |
Trim Statics |
Stack with CDP Correlation |
|
Window |
0.4-1.9 s |
|
Maximum Shift |
+/- 0.006 s |
|
Stack |
Nominal 60 fold |
| 14 |
Filter |
Bandpass |
|
Pass Band/Slope |
(45 Hz: 24 DB/OCT); (120 Hz: 60 DB/OCT) |
| 15 |
Amplitude Equalization |
RMS |
|
Windows |
(w#1: 0.1 s); (w#2: 0.2 s); (w#3: 0.4 s); (subsequent: 0.8 s) |
| 16 |
Signal Enhancement |
Random noise attenuation |