石油物探2012，Vol.51Issue(4)：377-382,6.DOI:10.3969/j.issn.1000-1441.2012.04.010
滨里海盆地M区块盐下构造变速成图
Variable-velocity mapping for sub-salt structure in Block M, Pre-Caspian Basin
摘要
Abstract
The Permian formation has developed giant thick salt domes in the Block M, Pre-Caspian basin. Because of the huge velocity difference between the salt domes and surrounding rocks, the sub-salt seismic events are pulled up in time sections and displays structure artifacts, which brings difficulty in well deployment. Based on analyzing the characteristics of the velocity and the difficulties in the variable-velocity mapping of saliferous basins, we firstly edited the anomalies in seismic stack velocity spectrum, then calculated the layer velocity through coherent inversion and optimized the velocity field combined with logging data. Finally, we carried out time-depth conversion and structure mapping by using map migration method. By using the above workflow, the structure map of Block M was obtained, and the impact of salt-dome velocity was removed, which displays the actual shape of sub-salt structure.关键词
滨里海盆地/盐下构造/变速成图/相干反演法/图形偏移Key words
Caspian Basin/ sub-salt structure/ variable-velocity mapping/ coherent inversion/ map migration分类
天文与地球科学引用本文复制引用
杨勤林,王彦春,张静,刘文卿,肖明图..滨里海盆地M区块盐下构造变速成图[J].石油物探,2012,51(4):377-382,6.基金项目
中国石油天然气股份有限公司科学研究与技术开发项目(2008E-1606)资助. （2008E-1606）
