An efficient method for calculating finite-difference seismograms after model alterations
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- Johan O. A. Robertsson
- ∗Schlumberger Cambridge Research Ltd., High Cross, Madingley Road, Cambridge CB3 0EL, United Kingdom. E-mail: jrobertsson@slb.com.; chapman@scr.slb.com.
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- Chris H. Chapman
- ∗Schlumberger Cambridge Research Ltd., High Cross, Madingley Road, Cambridge CB3 0EL, United Kingdom. E-mail: jrobertsson@slb.com.; chapman@scr.slb.com.
書誌事項
- 公開日
- 1999-11-30
- DOI
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- 10.1190/1.1444787
- 公開者
- Society of Exploration Geophysicists
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説明
<jats:title>Abstract</jats:title> <jats:p>Seismic modeling, processing, and inversion often require the calculation of the seismic response resulting from a suite of closely related seismic models. Even though changes to the model may be restricted to a small subvolume, we need to perform simulations for the full model.</jats:p> <jats:p>We present a new finite-difference method that circumvents the need to resimulate the complete model for local changes. By requiring only calculations in the subvolume and its neighborhood, our method makes possible significant reductions in computational cost and memory requirements. In general, each source/receiver location requires one full simulation on the complete model. Following these pre-computations, recalculation of the altered wavefield can be limited to the region around the subvolume and its neighborhood.</jats:p> <jats:p>We apply our method to a 2-D time-lapse seismic problem, thereby achieving a factor of 15 reduction in computational cost. Potential savings for 3-D are far greater.</jats:p>
収録刊行物
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- Geophysics
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Geophysics 65 (3), 907-918, 1999-11-30
Society of Exploration Geophysicists
