Angle-domain common-image gather extraction based on elastic reverse time migration

被引：0
|
作者：
Xu W. [1 ,2 ,3 ]
Zhu C. [1 ,2 ,3 ]
Wei Z. [1 ,2 ,3 ]
Zhang X. [4 ]
Du Q. [5 ]
机构：
[1] State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing
[2] SINOPEC Key Laboratory of Seismic Elastic Wave Technology, Beijing
[3] SINOPEC Petroleum Exploration and Production Research Institute, Beijing
[4] Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Qingdao
[5] Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao
来源：
Shiyou Diqiu Wuli Kantan/Oil Geophysical Prospecting | 2022年 / 57卷 / 04期
关键词：
Angle-domain common-image gather (ADCIG); Decoupled wave equation; Poynting vector; Pseudo-S-wave stress;
D O I：
10.13810/j.cnki.issn.1000-7210.2022.04.013
中图分类号：
学科分类号：
摘要：
Due to the coupling effect of P- and S-waves in the medium, multi-wave angle-domain common-image gathers (ADCIGs) encounter the problems such as energy crosstalk and low wavenumber noise in multicomponent seismic exploration. To solve the stress crosstalk problem in the construction of the Poynting vector of S-waves, this study uses the decoupled wave equation and pseudo-S-wave stress construction method to decouple the particle vibration velocity and stress, and the Poynting vectors of the P- and S-waves are constructed without energy crosstalk. Then, the PP-wave and PS-wave reflected angles are extracted given the Poynting vectors. On this basis, this paper proposes the PP-wave and PS-wave ADCIG extraction method based on the elastic reverse time migration (ERTM). Considering the low wavenumber noise in PP-wave ADCIGs, an angle attenuation superposition strategy for ADCIGs is proposed to improve the migration imaging accuracy. The model test verifies the correctness of the method. © 2022, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.
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页码：870 / 878
页数：8
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