A method for extracting angle-domain common-image gathers based on local plane wave decomposition

被引：0
|
作者：
Li H. [1 ,2 ]
Yang G. [1 ,2 ]
Li Z. [1 ,2 ]
Zhang K. [1 ,2 ]
Ranyang [3 ]
机构：
[1] School of Geosciences, China University of Petroleum (East China), Qingdao, 266580, Shandong
[2] Laboratory for Marine Mineral Resources, National Laboratory for Marine Science and Technology, Qingdao, 266071, Shandong
[3] Logging & Testing Services, Daqing Oilfield Company, PetroChina, Daqing, 163000, Heilongjiang
来源：
Shiyou Diqiu Wuli Kantan/Oil Geophysical Prospecting | 2017年 / 52卷 / 06期
关键词：
Angle-domain common-image gather (ADCIG); Local plane wave decomposition; Reverse-time migration (RTM); Velocity analysis;
D O I：
10.13810/j.cnki.issn.1000-7210.2017.06.007
中图分类号：
学科分类号：
摘要：
With the development of high precision seismic exploration and GPU technology, the prestack reverse-time migration (RTM) becomes a routine nowadays. The reverse-time migration shows great superiority in dealing with complex velocity models without limits of tilt angle. As an important output of reverse-time migration, the angle-domain common-image gather (ADCIG) can provide velocity information and amplitude information for velocity analysis and analysis of amplitude variation with angle of incidence (AVA). In this paper, we propose a method for extracting angle-domain common-image gathers from reverse-time migration. First the source wavefield and receiver wavefield are decomposed into local angle-domain components, and then angle-domain cross-correlation imaging conditions are used to angle-domain common-image gathers. The proposed method has good adaptability to complex structures. Finally, model and field data tests prove the effectiveness and feasibility of the proposed method. © 2017, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.
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页码：1177 / 1183
页数：6
相关论文
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