Detection of coalbed fractures with P-wave azimuthal AVO in 3-D seismic exploration

作     者：Guofa Li Suping Peng Bingshou He Xiaobo Peng Chunfang Yuan Chaoyuan Hu 

作者机构：China Univ Min & Technol Sch Resources & Safety Engn Beijing 100024 Peoples R China 

出 版 物：《Chinese Science Bulletin》 (CHINESE SCIENCE BULLETIN)

年 卷 期：2005年第50卷第S1期

页      面：146-150页

核心收录：

学科分类：081801[工学-矿产普查与勘探] 081802[工学-地球探测与信息技术] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：中国石油勘探开发研究院项目 科技部科研项目(2002CB211707) 

主　　题：seismic exploration azimuthal AVO anisotropy coalbed fracture reflection amplitude. 

摘      要：The detection of fractures is important for production and safety in coal fields. Subsurface fractures result in azimuthal anisotropy of the seismic wave, and the amplitude of reflection wave varies with offset and azimuth. In case of weak anisotropy, the reflection coefficients of P-wave are concisely denoted as the analytic function of fracture parameters. For the purpose of predicting the coal-bed fracture distribution through analyzing variation of the reflection amplitudes with offset and azimuth, 3-D seismic data with full-azimuth were acquired in a coal field in Huainan, Anhui Province. The careful analysis and process of seismic data showed that the reflection amplitude of the primary coalbed varied with azimuth in much consistent with the theoretical model. The conclusion was drawn that the coal-bed fracture in this coal field could be predicted through the method of the P-wave azimuthal AVO.