共偏移距可分表示法叠前深度偏移

张致付; 刘春园; 张春涛; 孟小红

Volume 32 Issue 4

Jul. 2007

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Article Navigation > Earth Science > 2007 > 32(4): 481-486

ZHANG Zhi-fu, LIU Chun-yuan, ZHANG Chun-tao, MENG Xiao-hong, 2007. The Offset-Domain Prestack Depth Migration with Optimal Separable Approximation. Earth Science, 32(4): 481-486.

Citation:

ZHANG Zhi-fu, LIU Chun-yuan, ZHANG Chun-tao, MENG Xiao-hong, 2007. The Offset-Domain Prestack Depth Migration with Optimal Separable Approximation. Earth Science, 32(4): 481-486.

ZHANG Zhi-fu, LIU Chun-yuan, ZHANG Chun-tao, MENG Xiao-hong, 2007. The Offset-Domain Prestack Depth Migration with Optimal Separable Approximation. Earth Science, 32(4): 481-486.

Citation:

ZHANG Zhi-fu, LIU Chun-yuan, ZHANG Chun-tao, MENG Xiao-hong, 2007. The Offset-Domain Prestack Depth Migration with Optimal Separable Approximation. Earth Science, 32(4): 481-486.

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The Offset-Domain Prestack Depth Migration with Optimal Separable Approximation

1.
State Key Laboratory of Geological Processes and Mineral Resources; Geo-detection Laboratory of the Ministry of Education, Beijing 100083, China
2.
School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China
3.
School of Natural Resource and Information Technology, China University of Petroleum, Beijing 102249, China

Received Date: 2007-04-12
Publish Date: 2007-07-25

Abstract

Abstract

The offset-domain prestack depth migration with optimal separable approximation, based on the double square root equation, is applied to image complex media with large and rapid velocity variations. The method downward continues the source and the receiver wavefields simultaneously. The mixed domain algorithm with forward Fourier and inverse Fourier transform is used to construct the double square root equation wavefield extrapolation operator. This operator separates variables in the wave number domain and variables in the space domain. The phase operation is implemented in the wave number domain, while the time delay for lateral velocity variation is corrected in the space domain. The migration algorithm is efficient for the seismic data and it is not computed shot by shot. The data set test of the Marmousi model indicates that the offset-domain migration provides a satisfactory seismic migration section on which complex geologic structures are imaged in media with large and rapid lateral velocity variations.
- double square root equation,
- optimal separable approximation,
- prestack depth migration

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References(17)

References

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