The research and implementation of velocity analysis methods for reverse time migration angle-gather

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Abstract Reverse time migration can improve the imaging quality of complex medium evidently, compared with other imaging methods, but it requires higher conditions than others to the accuracy of velocity models. In addition to providing the information of velocity for depth migration, as an important prestack migration output, common imaging gather also can provide the information of amplitude and phase; at the same time, it provides a basis for subsequent explanation of attributes. We derive the formula for angle-gather velocity analysis, and focus on the analysis of the characteristics, stability, and velocity sensitivity of the formula, etc. that provide a theoretical basis for the analysis of the following speed.We give the specific implementation process of human-computer interaction velocity analysis for reverse time migration angle-gather. The test results of model data and actual data show that the human-computer interaction velocity analysis methods for reverse time migration angle-gather, that we provide, are practical, and can get a better background velocity model.

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Key words： Reverse Time Migration Angle-gather Velocity Analysis Human-computer Interaction

Received: 2014-08-18;

Fund: This work is supported by special fund for research institutes supplied the National Key Research and Development Project(2018YFC0807804), the General Program of National Natural Science Foundation of China (42074175) and the Project Supported by Natural Science Basic Research Plan in Shaanxi Province of China (2020JM-714,2020JQ- 741,2021JQ-949).

Corresponding Authors: Gao Jing-Huai (E-mail: jhgao@mail.xjtu.edu.cn).
E-mail: jhgao@mail.xjtu.edu.cn

About author: Wang Baoli, received his PhD (2012) from xi’an jiaotong university. He is presently working on seismic imaging and high performance computing. His current research focus is on mine geophysical prospecting. E-mail:pooly1981@163.com.

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. The research and implementation of velocity analysis methods for reverse time migration angle-gather[J]. APPLIED GEOPHYSICS, 2024, 21(2): 279-288.

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