波动方程角度域共成像道集

陈生昌; 马在田; WuRu-shan

Volume 32 Issue 4

Jul. 2007

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CHEN Sheng-chang, MA Zai-tian, Wu Ru-shan, 2007. Angle Domain Common Image Gather for Wave Equation. Earth Science, 32(4): 569-574.

Citation:

CHEN Sheng-chang, MA Zai-tian, Wu Ru-shan, 2007. Angle Domain Common Image Gather for Wave Equation. Earth Science, 32(4): 569-574.

CHEN Sheng-chang, MA Zai-tian, Wu Ru-shan, 2007. Angle Domain Common Image Gather for Wave Equation. Earth Science, 32(4): 569-574.

Citation:

CHEN Sheng-chang, MA Zai-tian, Wu Ru-shan, 2007. Angle Domain Common Image Gather for Wave Equation. Earth Science, 32(4): 569-574.

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Angle Domain Common Image Gather for Wave Equation

1.
Department of Earth Sciences, Zhejiang University, Hang zhou 310027, China
2.
School of Ocean and Earth Science, Tongji University, Shanghai 200092, China
3.
Modeling and Imaging Laboratory, IGPP, University of California, Santa Cruz, CA 95064, USA

Received Date: 2006-10-16
Publish Date: 2007-07-25

Abstract

Abstract

Wave equation prestack depth migration based on wavefield depth recursive extrapolation can hardly give out a common image gather in offset domain as accurately as Kirchhoff integral based prestack depth migration does. In order to make up for this defect, we have analyzed various methods of wave equation migration common image gather. And by using the single square root operator for wavefield extrapolation and the windowed Fourier frame expansion and reconstruction of wavefield, a method for local angle domain common image gather is proposed, i.e. common image gather in reflection angle domain of imaging point. The application of the angle domain common image gather in Marmousi model data and a two dimensional real seismic data yields ideal results. The angle domain common image gather method for wave equation derived in this paper will provide a foundation for further migration velocity analysis and amplitude versus angle analysis of migrated data.
- wave equation,
- prestack depth migration,
- single square root operator,
- windowed Fourier frame,
- reflection angle,
- common image gather

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References(11)

References

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