广域电磁法在保靖页岩气勘探中的应用  

The Exploration of Wide Field Electromagnetic Method on Shale Gas

作　　者：符超 袁博[2,3] 李学兰[2,3] 李军广 

机构地区：[1]神华地质勘查有限责任公司,北京100085 [2]中南大学地球科学与信息物理学院,湖南长沙410083 [3]中南大学有色金属成矿预测与地质环境监测教育部重点实验室,湖南长沙410083

出　　处：《工程地球物理学报》2016年第4期416-422,共7页Chinese Journal of Engineering Geophysics

基　　金：国家自然科学基金(编号:41227803);湖南省重点实验室开放基金(编号:E21424)

摘　　要：在我国南方地区,复杂的地形和地下构造限制了常规地震勘探方法在页岩气勘探中的使用,如何充分、合理地发挥非地震勘探方法的技术优势,是页岩气勘探中必须面对的问题。为此在湖南保靖地区使用广域电磁法,以龙马溪组和牛蹄塘组为目的层,进行页岩气勘探,并对勘探成果进行解释,确认了该地区页岩气目的层具有低电阻的特征,基本查明了该地区页岩气主要目的层的分布规律。勘探结果表明,龙马溪组和牛蹄塘组具有使用电磁法勘探的电性基础;广域电磁法作为一种非地震的电磁勘探方法,具有在复杂地形和地下构造地区进行页岩气勘探的能力。该结果为电磁勘探方法在页岩气勘探中的应用提供了重要依据,促进了我国南方页岩气勘探方法技术的完善。In southern China, the use of conventional seismic exploration method in shale gas exploration is limited because of complex topography and subsurface structure. How to make full use of the advantage of non-seismic exploration is a problem we must face in shale gas exploration. In Baojing area, wide field electromagnetic method is used to find Longmaxi formation and Niutitang formation in shale gas exploration. Ifs certain that the resistivity of target strata is low and the distribution rules of target stratum is found out. The result shows that electromagnetic exploration method can he used to find Longmaxi formation and Niutitang formation. As a non-seismic exploration method and an electromagnetic exploration method, wide field electromagnetic method can be used in shale gas exploration in areas of complex terrain and underground structure, which has a good effect. It is an im portant example of electromagnetic exploration method used in shale gas exploration and promotes the improvement of shale gas exploration technology in south China.

关 键 词：广域电磁法 页岩气勘探 非地震勘探 龙马溪组 牛蹄塘组 

分 类 号：P631.3[天文地球—地质矿产勘探]