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| Preserved amplitude shot domain Gaussian beam migration |
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YUE Yubo1, LI Zhenchun1, LIU Wei2, ZHANG Qing1
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(1.College of GeoResources and Information in China University of Petroleum, Qingdao 266555, China;2.Gathering Department, CNPC Chuanqing Drilling Engineering Company Limited, Chengdu 610213, China)
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| Abstract: |
| The inverse wavefield extrapolation formula in terms of Gaussian beam was derived, and combined with deconvoluation imaging conditions, a 2D preserved amplitude shot domain Gaussian beam migration formula was obtained. During the realization of this migration method, the method of steepest descent is needed to reduce the two dimensional complex integral to one dimensional. The computation procedure of shot domain Gaussian beam migration was given. Finally, the proposed method was tested on horizontal layer model and Marmousi model respectively. The exactness and effectiveness of this migration method was validated by the results. |
| Key words: preserved amplitude Gaussian beam migration deconvoluation imaging conditions method of steepest descent |
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