1. Acquisition and Design Committee
Chuck Meeder - Co-Chair
Adam Seitchik - Co-Chair
Tim Brice
Robert Bloor
Roger Sollie
Laurent Lemaistre
Nick Moldoveanu

2. Committee Objectives
Responsible for designing acquisition strategies for simulated seismic datasets and for integration between all Technical Committees.
Technical exchange
Testing
Design recommendations
Dataset recommendations

3. Model with Salt 1 2 3 4
40 km
35km
3D View

4. Testing
Exploding Reflector from Oligocene – 3D view 1 2 3 4

5. Testing Basement Target Max Travel Time 1 2 3 4 16.7 s 16.2 s
-20 km offset km
12 s
9 s
-20 km offset 3 4
14.7 s
20 s
18 s
16 s
14 s
11 s

6. Testing
Migration Aperture - Top Oligocene

7. Testing
Different shooting directions selected from a 150 m x 150 m source grid

8. Basic recording patch
40 km
35km

9. Acquisition Parameter
Frequency max <= 30Hz
min >= 1Hz
Source – receiver offset +/- 9.9 km
Migration ½ aperture 10 km
Calculation aperture 30 km (+/- 15km offset from CMP/CDP)
Record length 16 seconds
Sample interval 8 ms
Receiver interval 30 m grid
Shot Spacing m grid
Shot area whole model 35 x 40 km
Source and receiver depth 15 m
Recording grid dimensions 19,800 meters x 19,800 meters
Number of recorded channels 661 x 661 = 436,921
Fold inline x 66 xline = 4,356

10. Classic Datasets Objectives: Easily accessible datasets
Compact but complete
Datasets that will be standards for analysis by many investigators
Allow for a wide range of investigations
Wide azimuth imaging tests
Wide azimuth processing and acquisition tests and development
Various WAZ designs presently being used
WAZ vs NAZ
General processing and imaging with quality numerical data

11. Classic Datasets 3 Classic datasets with all receivers
Nine NS shot lines across center of model; pressure and vertical component of velocity
9*267 shots ~ 17 TB uncompressed; 150 m shot spacing
Nine NS shot lines across center of model; absorbing upper surface; pressure vertical component of velocity
Full azimuth sparse 3D shot coverage
2793 shots; 600 m spacing; approved; ~10 TB uncompressed
4 Wide-Azimuth datasets extracted from full survey
Wide azimuth NS push-pull
~4.1 TB uncompressed
Wide azimuth NS interleaf; pull only
~1.7 TB uncompressed
Wide azimuth EW push-pull
Wide azimuth EW interleaf pull only
4 Narrow-Azimuth datasets extracted from Full survey
Narrow Azimuth NS push-pull
~1.2 TB uncompressed
Narrow Azimuth NS pull
~0.5 TB uncompressed
Narrow azimuth EW push-pull
Narrow azimuth EW pull

12. Acquisition Examples Full Azimuth Sparse 3D dataset Shot spacing
X: 600 m
Y: 600 m
Start XY
(3025,3050)
End XY
(31825,36650)
All receivers
(57 shots)
(49 shots)

13. Acquisition Examples Wide Azimuth NS Push-Pull dataset Shot spacing
X: 600 m
Y: 150 m
Start XY
(3025,3050)
End XY
(31825,37100)
Receivers
70 cables
120 m separation
30 m group interval
11172 total shots
46270 traces/shot (max)

14. Status