Beamlet Prestack Depth Migration on Crosswell Data
详细信息
- 责任者：Ye Yueming (Hangzhou Research Institute of Geology ; PetroChina ; Hangzhou 310023 ; China) ; Li Zhenchun
- 刊名：Oil Geophysical Prospecting
- 出版年：2012
- 卷期：47(1)
- 关键词：地震勘探 ; seismic exploration ; 井间法 ; interwell methods
- 页码：p.27-31
- 图表：5 illus., 16 refs.
- 分类号：2000
- 出版序号：20130619
- issnNo：ISSN1000-7210
- isbnNo：CN13-1095/TE
摘要
The authors can get better complex structure image from prestack depth migration of surface seismic data, but it lacks of resolution when imaging in some area with thin layers. Cross-well acquisition system has little effect from the surface and has higher frequency information, which can get higher resolution image. In this paper, the authors perform the crosswell prestack depth migration with the thought of wave field accumulation gradually based on the directly downward continuation. The beamlet migration operator was introduced which has localized reference velocity. The localized reference velocity reduces the perturbation velocity and improves the calculation accuracy. The test of complex crosswell model migration has proved the validity and effectiveness of the method.
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