新疆石油地质

新疆石油地质 ›› 2009, Vol. 30 ›› Issue (3): 337-339.

• 油气勘探 • 上一篇    下一篇

多层裂缝介质转换横波分裂分析技术及应用

张学映, 马昭军, 徐美   

  1. 中国石化 西南分公司 勘探开发研究院 德阳分院,四川 德阳618000
  • 收稿日期:2008-07-09 修回日期:2008-12-10 出版日期:2009-06-01 发布日期:2020-10-29
  • 作者简介:张学映(1966-),女,四川广安人,工程师,地球物理勘探,(Tel)0838 -2310804(E-mail)zhangxy66@yahoo.com.cn.
  • 基金资助:
    中国石化重点科技攻关项目,川西凹陷须家河组地震勘探新技术开发应用( P05003 )资助

Technique and Application of Converted-Wave Spltting for Multi-Layer Fracture Media

ZHANG Xue-ying, MA Zhao-jun, XU Mei   

  1. Deyng Branch, Research Institute of Exploration and Development, Southwest Oilfield Company, Sinopec, Deyang,Sichuan 61 8000, China
  • Received:2008-07-09 Revised:2008-12-10 Online:2009-06-01 Published:2020-10-29

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摘要： 基于横波分裂理论,实现了一种利用宽方位转换波的径向和横向分量求取能量比的转换横波分裂分析方法。在此基础上,实现了多层裂缝介质的层剥离横波分裂分析技术。首先,利用能量比法求出第一层裂缝介质的方位角,快、慢波时差等裂缝参数;然后应用慢波数据进行慢波时差补偿;最后将快波和补偿后的慢波旋转回原来的径向和横向分量。将第一层裂缝介质转换为各向同性介质后,依此类推,进行以下多层各向异性介质的横波分裂分析,得到各层的裂缝参数。该技术已用于川西的裂缝预测,取得了较好的效果。

关键词: 转换波, 横波分裂, 层剥离, 快横波, 时差

Abstract: Based on S-wave spliting theory, this paper presents a converted-wave splitting analysis method for getting energy ratio using radial and transverse components of wide-azimuth converted-wave data, and proposed the layer stripping S-wave splitting technique for multi-layer fracture media. Firstly, the energy ratio method is used to obtain the azimuth and time delay of the first layer fracture medium. Then, the time delay is applied to compensation of slow-wave time delay. Lastly, the fast-wave and compensated slow wave are rotated back to original radial and transverse components. After the first fracture medium is converted into isotropic medium, the fractural parameters are obtained by lower multi-layer anisotropic media analysis. The technique has been applied to prediction of stratigraphic fractures in western Sichuan and good results have been acquired.

Key words: converted-wave, S-wave spltting, layer stripping, fast S wave, time delay

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