Fast full-wave seismic inversion using source encoding.

Conference · Sat May 01 04:00:00 EDT 2010

OSTI ID:1012740

Ho Cha, Young ^[1]; Baumstein, Anatoly ^[1]; Lee, Sunwoong ^[1]; Hinkley, David ^[1]; Anderson, John E ^[1]; Neelamani, Ramesh ^[1]; Krebs, Jerome R ^[1]; Lacasse, Martin-Daniel ^[1]

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1. ExxonMobil

Full Wavefield Seismic Inversion (FWI) estimates a subsurface elastic model by iteratively minimizing the difference between observed and simulated data. This process is extremely compute intensive, with a cost on the order of at least hundreds of prestack reverse time migrations. For time-domain and Krylov-based frequency-domain FWI, the cost of FWI is proportional to the number of seismic sources inverted. We have found that the cost of FWI can be significantly reduced by applying it to data processed by encoding and summing individual source gathers, and by changing the encoding functions between iterations. The encoding step forms a single gather from many input source gathers. This gather represents data that would have been acquired from a spatially distributed set of sources operating simultaneously with different source signatures. We demonstrate, using synthetic data, significant cost reduction by applying FWI to encoded simultaneous-source data.

• Research Organization: Sandia National Laboratories
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1012740
• Report Number(s): SAND2010-2935C
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
97 MATHEMATICS AND COMPUTING
COMPUTER CALCULATIONS
COST
DATA PROCESSING
SEISMIC SOURCES
SEISMIC WAVES