Detecting of coal bed fractures using P-wave data

摘要：

Because coal bed fractures are the main storage space and migration channels, CBM detecting is reasonable transformed into the exploration of coal bed fractures. By introducing a physical modeling results, compared P-wave detecting methods of traveltime anisotropy, interval velocity anisotropy and azitnuthal AVO. By that comparison, found the detecting results of above methods affected by structures except the predicting of azimuthal AVO. By set up several numerical models > discussed theoretical responses of azimuthal AVO reflected on coal roof. To a given coal roof, with the crack density increasing the AVO gradient and intercept of special azimuth linear increases and decreases respectively, and with the crack density increasing the gradient differences between special azimuth increases linearly. On the other hand, the AVo gradient of sandstone roof is almost the double of mudstone roof. That is to say, it is theoretic possibility to detect coal bed fractures and its roofs lithology.

关键词： coal bed methane coal bed fractures P-wave anisotropy azimuthal AVO

作者: T.J.Chen R.F.Cui X.Wang Y. Z. Xu

作者单位: School of Resource and Earth Science. China University of Mining & Technology, Xuzhou, 221116 ,Jiang School of Resource and Earth Science. China University of Mining & Technology, Xuzhou, 221116 ,Jiang

会议类型: 国际会议

会议名称: 2009 Asia Pacific Coalbed Methane Symposium and 2009 China Coalbed Methane Symposium(2009亚洲太平洋国际煤层气会议暨2009年全国煤层气学术研讨会)

会议地点: 徐州

会议语种:英文

页码: 432-438

在线出版日期: 2009-09-24（万方平台首次上网日期，不代表论文的发表时间）