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叠前反演在西湖凹陷A构造低渗气层边界识别中的应用

海洋石油

2015年 35卷第2期

阅读：131

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Title

Application of Pre-stack Inversion to Identification of the Boundary of Low Permeability Gas Reservoir in Xihu Sag

作者

邹玮张雷姜勇王超

Authors

ZOU Wei ZHANG Lei JIANG Yong WANG Chao

单位

中海石油(中国)有限公司上海分公司, 上海 200030

Organization

Shanghai Branch of CNOOC Ltd., Shanghai 200030, China

摘要

西湖凹陷A构造花港组储层埋藏深,具有低孔渗和横向变化快的特点。通过对构造区已钻井低渗气层的岩石物理分析,研究了弹性参数与岩性、物性和含油气的关系,优选Vp/Vs作为低渗气层识别的敏感参数,并针对构造区开展叠前同步反演,结合Vp/Vs岩性反演和构造解释成果,精细合理地刻画了低渗气层的边界,建立了一套有效的低渗气层识别的技术系列。

Abstract

The Huagang Fm.reservoir in Structure A in Xihu sag is characterized by deep burial depth,with low porosity and low permeability,and quick lateral variation.By analyzing the petrophysics of low permeability gas layers in drilled wells,the relationship between elastic parameter with lithology,and physical property with oil-gas bearing conditions has been studied.The parameter of Vp/Vs has been selected as the sensitive parameter to identify low-permeability gas reservoir,and pre-stack inversion has been conducted for the structural area.Combining with lithologic inversion of Vp/Vs and results of structural interpretation,the boundary of low permeability gas reservoir has been determinate,and a set of effective technology has been established for identification of the boundary of the low permeability gas reservoir.

关键词：

西湖凹陷; 低渗储层; 叠前同步反演; 气层边界;

Keywords:

Xihu sag; low permeability reservoir; pre-stack inversion; boundary of gas reservoir;

基金项目

DOI

https://doi.org/10.3969/j.issn.1008-2336.2015.02.046