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- W2372187467 abstract "Velocity modeling and imaging of salt domes are bottlenecks in subsalt reservoir exploration.Because of large velocity variance between salt domes and surrounding rocks and large thickness changing in spatial direction,many problems are present in subsalt seismic exploration,such as seismic wave filed complexity,and structural distortion in time domain.According to the complex geological characters of Area H,we can learn more about the subsalt reservoirs through technological innovation.As to the difficulties of salt velocity modeling,this paper proposes an idea called multi-information constrained layer-bound solid modeling technique,which uses sequential Gauss simulation and CVI method to solve velocity anomalies in subsalt structure,and can remarkably improve the precision of velocity modeling.As to the complex subsalt structure imaging,through studying based on the finite difference method,this paper proposes a precise and efficient finite difference scheme for reverse-time wave field extrapolation.Based on GPU/CPU cooperating system,we extrapolate the wave field forwardly and reversely in time domain that needs the maximum amount of calculation through GPU.This paper adopts reverse time migration in depth domain,which can precisely image the reflected waves from steep dip(even exceeding 90 degrees in the adjacent beds of a salt dome).By the theoretical test of salt dome model,we verify the correctness of the algorithms and methods mentioned above.Through the reverse time migration method,we solve the problem of imaging sub-salt structure and the adjacent beds,so we can migrate the salt dome and the adjacent beds to their true positions,and eliminate structure distortion of underlying beds in time domain due to the velocity anomaly of the salt dome.So fnianlly we can get precise migration results of sub-salt structure in depth domain." @default.
- W2372187467 created "2016-06-24" @default.
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- W2372187467 date "2013-01-01" @default.
- W2372187467 modified "2023-09-26" @default.
- W2372187467 title "Application of velocity modeling and reverse time migration to subsalt structure" @default.
- W2372187467 hasPublicationYear "2013" @default.
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