利用S波源VSP四分量检测裂缝

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摘要本文利用S波源VSP四分量资料进行裂缝检测。首先利用非零偏P波对S波源进行定位,再利用Alford旋转分离出快、慢横波,并求出快、慢波时差;最后用快、慢波时差计算各向异性因子以及裂缝密度。处理结果与钻井资料对比证明,S波源VSP四分量资料是研究岩体应力和裂缝结构的有力工具,也是进行裂缝方位探测和裂缝性储层描述的有效方法。

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关键词 ： S波源, VSP, 四分量, 横波分裂, 偏振方向, 裂缝

Abstract：The paper presented a method for detecting fracture by using four-component VSP data from S-wave source.It conducts location of S-wave source using nonzero offset P-wave VSP data first,then the S-wave data has been separated into fast and slow S-waves by Afford rotation method and resulted time difference between fast and slow waves; finally,anisotropic factors and fracture density has been calculated from time difference of fast and slow waves.Comparing processed results with drilling data shows that four-component USP data from S-wave source is a powerful tool for studying rock stress and fracture structure,also is effective method carrying out surveying fracture orientation and describing fractured reservoir.

Key words： Swave source VSP four-component shear wave splitting polarization direction fracture

收稿日期: 1999-11-18

作者简介: 高希勤,高级工程师,1943年生,1966年毕业于武汉测绘学院天文大地重力专业.长期从事地震资料理及软件开发工作,发表过多篇论文.现在中国石油集团公司物探监理中心任处理总监.

引用本文:

高希勤, 高爱荣, 于德华, 白俊辉, 高宏洁 . 利用S波源VSP四分量检测裂缝[J]. 石油地球物理勘探, 2001, 36(1): 93-99. Gao Xiqin, Gao Airong, Yu Dehua, Bai Junhui, Gao Hongjie. Fracture detecting by four-component VSP data from S-wave source. OGP, 2001, 36(1): 93-99.

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http://www.ogp-cn.com/CN/ 或 http://www.ogp-cn.com/CN/Y2001/V36/I1/93