内蒙古突泉盆地双低阻层的发现及其地质意义  

The discovery of two conductive layers in Tuquan basin,Inner Mongolia,and its geological significance

作　　者：方慧[1,2] 钟清[1,2] 陈树旺[3] 

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [2]国土资源部地球物理电磁法探测技术重点实验室,河北廊坊065000 [3]中国地质调查局沈阳地质调查中心,辽宁沈阳110034

出　　处：《地质通报》2013年第8期1253-1259,共7页Geological Bulletin of China

基　　金：中国地质调查局项目(编号:1212011120971);国土资源部公益性行业科研专项项目(编号:SinoProbe-01-04)

摘　　要：为调查评价大兴安岭南部地区晚古生代以来的油气资源前景,在内蒙古突泉盆地牤牛海凹陷区内实施了MT和AMT剖面测量工作.探测结果显示,在火山岩覆盖层下深度800～2000m和2000～8000m范围内发现2套低阻层.低阻层不仅厚度较大,横向分布也很连续.在钻井资料的约束下,结合区域地质资料综合分析认为,第1套低阻层是早侏罗世煤系地层的反映,第2套低阻层可能是晚古生代以泥岩为主地层的反映.结合地面烃源岩调查结果,推定这2套地层都有可能发育较好的烃源岩.研究表明,突泉盆地具有寻找上古生界和下中生界油气资源的潜力.MT and AMT profiling was conducted in Mangniuhai sag area of Tuquan basin so as to evaluate the potential of oil and gas resources associated with the late Paleozoic and Mesozoic strata.The results of MT and AMT profile survey shows that there are two thick and transverse continuous distribution conductive layers under the volcanic layer at the depth of 800~2000m and 2000~8000m,respectively.By combining drilling material and regional geological material,the authors consider that the first conductive layer repre sents the coal strata of early Jurassic,and the second conductive layer represents the mudstone layer of upper Paleozoic.Based on the results of ground hydrocarbon source rocks survey,it can be predicted that both the conductive layers could contain excellent hydrocarbon source rocks,which means that there exists great potential for detecting the upper Paleozoic and the early Mesozoic hydrocarbon resources in Tuquan basin.

关 键 词：内蒙古突泉盆地 大地电磁测深 低阻层 有利烃源岩 

分 类 号：P539.3[天文地球—古生物学与地层学] TE122.1[天文地球—地质学]