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《Coal Science and Technology》 2014-12
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Research of Transient Electromagnetic Method Detection on Groundwater Response During Coalbed Methane Well Drainage

GE Yan-yan;FU Xue-hai;SHE Jian-zhong;LI Sheng;School of Resources and Geoscience,China University of Mining and Technology;College of Geology and Mining Engineering,Xinjiang University;Xinjiang Geology and Mineral Resources Bureau;  
In order to monitor hydrogeology dynamic change effectively and discuss the migration of groundwater during drainage,transient electromagnetic method( TEM) was carried out to track and simulate the groundwater of No. 3 Coalbed near PE- 055 Well which was located in Panzhuang Block. The study found that dynamic changes of hydraulic connection and the storage of groundwater were caused during the process of drainage. That synchronous change between apparent resistivity and groundwater connectivity were highly coupled showed that TEM could monitor groundwater migration well. Apparent resistivity,reduced within certain range in the area of strong groundwater connectivity by comparison,would increase within different degree in the area of poor groundwater connectivity after drainage. The differences of reservoir between before and after drainage as well as instructions of groundwater migration direction were reflected by dynamic change of apparent resistivity,which provided new ideas and technologies for groundwater monitoring during CBM well's drainage.
【Fund】: 国家重点基础研究发展计划(1973计划)资助项目(2009CB219605);; 国家重大科技专项资助项目(2011ZX05034-004);; 新疆维吾尔族自治区“天山学者”启动基金资助项目(11100213);; 煤层气资源与成藏过程教育部重点实验室(中国矿业大学)开放基金资助项目(2012-004)
【CateGory Index】: P641.4;P631.325
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