Abstract: After fully expounding the principles and procedures of DIVA technique,and accordingto the specific geological conditions and data features of working areas,this paper made anirnprovement on the existing DIVA technique,which enhances the accuracy and resolution ofthe technique.The improved technique were applied to study the reservoir rocks of JZ15-2 structure inLiaodong Gulf region.The results show that,in JZ15-2 structure,the reservoir quality ofinterest layers in Dongying member is not quite good,with only limited reservoir rock distributions in lower layers,and the reservoir quality of Shahejie interest layer is very good,which distributed rather stahly.

Key words: seismic velocity, longitudinal wave, velocity analysis, 3-D seismic interpretation, interval velocity, reservoir physical property, reservoir description

摘要： 在讨论差异层间速度分析原理以及岩石物性对地震纵波速度影响程度的基础上,将差异层间速度分析法引入到三维地震储层物世分析之中,并使其达到定量化.该方法在辽东湾地区锦州15-2构造下第三系沙河街组砂层中发现了储集物性有利的部位,并指明东下段中部砂体的储集性能较差.

关键词: 地震波速, 纵波, 速度分析, 三维地震解释, 层速度, 油层物性, 储集层描述