A shale gas exploration test with AMT method in Cengong area, Northeast Guizhou
Min Gang1, Wang Xuben1, Zhang Bin1, Yu Qian2, Wei Wei1
1. Key Laboratory of Earth Exploration and Information Technology, Ministry of the Education, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
2. Chengdu Institute of Geology and Mineral Resources, Chengdu, Sichuan 610082, China
Abstract：Shale gas is normally in the mudstone, high carbon mudstone, shale and silty rocks. The enrichment indicator of shale gas depend on many factors such as organic carbon content, maturity, kerogen type, hydrocarbon rate, and stratum depth and crack. Because the resistivity of these kinds of strata is always lower than that of the country rocks, we usually look for low resistance layer first and then test the enrichment indicator. To test audio magnetotelluric (AMT) method in the shale gas exploration, we have conducted an AMT survey in Cengong area, Northeast Guizhou, and we have identified two low resistivity targets based on indicator parameters of Niutitang Formation by preview geochemical studies, lower part of Bianmachong Formation and Niutitang Formation. Latter drilling results show that AMT method combined with geochemical tests can effectively determine shale gas formation depth and thickness.
闵刚, 王绪本, 张兵, 余谦, 魏崴. AMT法在黔东北岑巩地区的页岩气勘探试验[J]. 石油地球物理勘探, 2014, 49(4): 815-824.
Min Gang, Wang Xuben, Zhang Bin, Yu Qian, Wei Wei. A shale gas exploration test with AMT method in Cengong area, Northeast Guizhou. OGP, 2014, 49(4): 815-824.
