Making prestack depth migration work despite the inherent‐errors in the velocity model building process

1997 ◽  
Author(s):  
Christof Stork ◽  
Phil Ensign ◽  
Bill Harlan
Keyword(s):  
Model Building ◽  
Velocity Model ◽  
Prestack Depth Migration ◽  
Depth Migration ◽  
Velocity Model Building ◽  
Building Process ◽  
Model Building Process

Efficient velocity model building for prestack depth migration

1996 ◽  
Vol 15 (6) ◽  
pp. 751-753 ◽  
Author(s):  
Y. C. Kim ◽  
C. M. Samuelsen ◽  
T. A. Hauge
Keyword(s):  
Model Building ◽  
Velocity Model ◽  
Prestack Depth Migration ◽  
Depth Migration ◽  
Velocity Model Building

Velocity model building technique and prestack depth migration on a work station

1992 ◽  
Author(s):  
Geoffrey F. Mills ◽  
Matthew Brzostowski ◽  
Stephen Ridgway ◽  
Wen Fong Chang ◽  
Chuck Barton
Keyword(s):  
Model Building ◽  
Velocity Model ◽  
Prestack Depth Migration ◽  
Work Station ◽  
Depth Migration ◽  
Velocity Model Building ◽  
Building Technique

3-D prestack depth migration and velocity model building

1998 ◽  
Vol 17 (7) ◽  
pp. 897-906 ◽  
Author(s):  
Ian F. Jones ◽  
Keith Ibbotson ◽  
Martin Grimshaw ◽  
Pierre Plasterie
Keyword(s):  
Model Building ◽  
Velocity Model ◽  
Prestack Depth Migration ◽  
Depth Migration ◽  
Velocity Model Building

An offshore Gabon full-waveform inversion case study

2016 ◽  
Vol 4 (4) ◽  
pp. SU25-SU39 ◽  
Author(s):  
Bingmu Xiao ◽  
Nadezhda Kotova ◽  
Samuel Bretherton ◽  
Andrew Ratcliffe ◽  
Gregor Duval ◽  
...  
Keyword(s):  
Model Building ◽  
Waveform Inversion ◽  
Velocity Model ◽  
Earth Model ◽  
Full Waveform Inversion ◽  
Full Waveform ◽  
Velocity Model Building ◽  
Building Process ◽  
Model Building Process

Velocity model building is one of the most difficult aspects of the seismic processing sequence. But it is also one of the most important: an accurate earth model allows an accurate migrated image to be formed, which allows the geologist a better chance at an accurate interpretation of the area. In addition, the velocity model itself can provide complementary information about the geology and geophysics of the region. Full-waveform inversion (FWI) is a popular, high-end velocity model-building tool that can generate high-resolution earth models, especially in regions of the model probed by the transmitted (diving wave) arrivals on the recorded seismic data. The history of the South Gabon Basin is complex, leading to a rich geologic picture today and a very challenging velocity model-building process. We have developed a case study from the offshore Gabon area showing that FWI is able to help with the model-building process, and the resulting velocity model reveals features that improve the migrated image. The application of FWI is made on an extremely large area covering approximately 25,000 [Formula: see text], demonstrating that FWI can be applied to this magnitude of survey in a timely manner. In addition, the detail in the FWI velocity model aids the geologic interpretation by highlighting, among other things, the location of shallow gas pockets, buried channels, and carbonate rafts. The concept of actively using the FWI-derived velocity model to aid the interpretation in areas of complex geology, and/or to identify potential geohazards to avoid in an exploration context, is applicable to many parts of the world.

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