The Elastic Wave Equation Forward Modeling and Wave-Field Characteristic Analysis for the Salt Dome Model
详细信息
- 责任者：Di Bangrang (Key Lab. of Geophysics ; CNPC ; China University of Petroleum ; Beijing 102249 ; China) ; Pei Zhenglin
- 刊名：Oil Geophysical Prospecting
- 出版年：2010
- 卷期：45(6)
- 关键词：盐丘构造 ; salt domes ; 地震模型法 ; seismic modeling
- 页码：p.826-832
- 图表：6 illus., 11 refs.
- 分类号：1600
- issnNo：ISSN1000-7210
- isbnNo：CN13-1095/TE
摘要
In this paper, the forward modeling for theoretical model and field model of the salt dome structure was conducted, the influence of the complicated salt dome structure to the seismic response were analyzed in detail. The results show that: 1) the elastic wave divergence field and the vortex field respectively described the P-wave wave-field energy characteristics and the converted wave wave-field characteristics; 2) the salt dome caused obvious energy focusing effects for the reflection wave-field and the scattered wave-field, it imposed great modulation on the wavefront of the transmitted wave; and 3) compared with the Kirchhoff pre-stack time migration, the Kirchhoff pre-stack depth migration could more accurately image for the steep structures beside the salt dome and under the salt dome.