Lithologic Reservoirs >

2007 , Vol. 19 >Issue 3: 101 - 105

DOI: https://doi.org/10.3969/j.issn.1673-8926.2007.03.018

Research and appl ication of amplitude-preserved split-step Fourier prestack depth migration

  • YANG Zhanlong ,
  • ZHANG Zhenggang ,
  • CHEN Qilin ,
  • GUO Jingyi ,
  • SHA Xuemei ,
  • LIU Wensu
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  • Research Institute of Petroleum Exploration & Development-Northwest(NWGI), PetroChina, Lanzhou 730020, China

Online published: 2007-09-15

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Abstract

Both the travel-time information and amplitude information are required to be contained in the prestack depth migration imaging results in the lithology analysis. Based on one-way wave equation , split step Fourier prestack depth migration method is fast and steady. It is carried out by phase shift processing in frequency-wave number domain and time shift processing in f requency-space domain according to the idea of velocity field split . The disadvantages of conventional one-way wave equation in amplitude preserved migration restrict the application of this method in lithology imaging. So split-step Fourier amplit ude-preserved migration operator was put forward. It carries out the amplitude-preserved migration with the phase shift amplitude-preserved correction operator in frequency-wave number domain and time shift amplitude-preserved correction operator in f requency-space domain. The comparison of the shot illumination analysis result s and the prestack depth migration imaging results aiming at Marmousi model indicated the validity and effectiveness of this method.

Key words： lithologic traps; continental basins; seismic information; technology application; key factors analysis

Cite this article

YANG Zhanlong , ZHANG Zhenggang , CHEN Qilin , GUO Jingyi , SHA Xuemei , LIU Wensu . Research and appl ication of amplitude-preserved split-step Fourier prestack depth migration[J]. Lithologic Reservoirs, 2007 , 19(3) : 101 -105 . DOI: 10.3969/j.issn.1673-8926.2007.03.018

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