The Pre-Stack Depth Migration Velocity Model for Complex Geological Structure in Southern Margin of Junggar Basin: Modeling and Effect
详细信息
- 责任者：Luo Yong (Research Institute of Exploration and Development ; Xinjiang Oilfield Company ; PetroChina ; Urumqi 830013 ; China) ; Zhang Long
- 刊名：Xinjiang Petroleum Geology
- 出版年：2013
- 卷期：34(5)
- 关键词：叠前深度偏移 ; prestack depth migration ; 速度分析 ; velocity analysis ; 准噶尔盆地 ; Junggar Basin
- 页码：p.576-579
- 图表：4 illus., 12 refs.
- 分类号：1600
- issnNo：ISSN1001-3873
- isbnNo：CN65-1107/TE
摘要
Dushanzi area in the southern margin of Junggar basin is characterized by complex near-surface structure,up-steep and down-gentle geological structure style,fault development and very complicated wave fields,which give rise to difficulties in the pre-stack depth migration in this area. This paper presents the key procedures for the seismic pre-stack depth migration velocity model(PSDM) applied in Dushanzi area:(1) making full use of well data to establish interval velocity map,and eliminate the influence of near surface Xiyu conglomerate on the underlying interval velocity;(2) making restricted correction of the seismic velocity using drilled well velocity data and improving the accuracy of the velocity model with along layer coherent inversion;(3) establishing the 3D velocity model based on the 2D grid to ensure the closure of space and time in 2D grid velocity field. The case study shows good imaging effects by using the PSDM technology.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |