西南石油大学学报(自然科学版) ›› 2012, Vol. 34 ›› Issue (5): 78-82.

• 地质勘探 • 上一篇    下一篇

基于保角变换法的地震裂缝波场研究

陈伟,王尚旭   

  1. “油气资源与探测”国家重点实验室· 中国石油大学(北京),北京昌平102249
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-10-01 发布日期:2012-10-01

Application Research Based on the Conformal Mapping to theWave Field of Seismic Fracture

Chen Wei, Wang Shangxu   

  1. State Key Laboratory of Oil and Gas Resources and Detection,China University of Petroleum(Beijing),Changping,Beijing 102249,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-10-01 Published:2012-10-01

摘要: 针对实际地层中的裂缝形状,提出了两种裂缝模型,一种是广义四边形裂缝模型,另一种是角形裂缝模型。
基于保角变换,对单个裂缝的波场进行了研究。首先,对物理域中的裂缝区域施加保角变换,将其变换为计算域中的
上半平面,对物理域中的裂缝边界条件进行保角变换为计算域中的边界条件;其次,在计算域中求出裂缝边界及其附
近的波场;最后,通过保角变换的反变换得到物理域中裂缝边界波场变化规律。提出的保角变换法对研究单个和多个
任意形状的裂缝波场之间的定量关系以及勘探地球物理中的非均质问题提供了新的思路。

关键词: 裂缝, 波场, 广义四边形, 角形, 保角变换

Abstract: In view of the actual shape of fracture formation,two fracture models are presented in this paper. One is general
quadrilateral fracture model,and the other is the horny fracture model. The wave fields of single fracture were studied based on
the conformal mapping method. First of all,the conformal mapping on the fracture area in physical domain was transformed to
the upper half plane in the computational domain and the boundary conditions in physical domain to the boundary conditions
in the computational domain;secondly,the wave fields near the boundary of the fracture in the computational domain were
calculated;fInally,the wave fields variation curve in the boundary of physical domain through the inverse conformal mapping
transformation was obtained. The conformal mapping method are used in our research on the quantitative relationship of the
wave fields of a single and several any shape fracture provides some new ideas about the heterogeneity problem in the exploration
geophysical.

Key words: fracture, wave field, general quadrilateral, horny, conformal mapping