Geomorphology of Guizhou Province belongs to the plateau mountain area of southern China, where the terrain undulates greatly, regional carbonate rock is widely distributed, there exist towns, roads and other human interferences, and geological structure is complex. Therefore, it is difficult for conventional methods to obtain good exploration results. With the utilization of wide field electromagnetic method in Ziyun area of Guizhou Province, the distribution range and buried depth of the deep shale series were basically determined, and the fault characteristics in this area were detected, which provided the geophysical exploration basis for the drilling arrangement. The results were verified by drilling, and good exploration results were obtained. The case study shows that the wide field electromagnetic method is suitable for exploration in carbonate rock area of complex terrain, and it is an effective method for deep exploration.
Liu Y Z, Zhan S Q, Li A Y , et al. Application of AMT in the Exploration of an Iron Mining Area in Indonesia[J]. Geophysical Exploration and Exploration, 2012,36(4):559-561.
Hu T, Li D S . E-Ex wide field electromagnetic method for low resistance thin layer resolution[J]. Geophysical Prospecting and Geochemical Prospecting Calculation Technology, 2014,36(3):297-303.
Li Z, Ran B, Wang M H , et al. Sedimentary facies analysis of the Dawuba formation of the Carboniferous system in Ziyun area, Guizhou[J]. Journal of Hebei GEO University, 2017,40(2):1-9.
Yuan K, Wang K Y, Gong S H , et al. Shale gas enrichment characteristics and its influencing factors of Dawuba formation in southern Guizhou[J]. Coal Geology of China, 2018,30(3):28-34.
Yuan K, Wang C, Qin Y L , et al. Marine shale gas of Upper Paleozoic was found in South Guizhou (well 1 in Qianzipe)[J]. China Geology, 2017,44(6):1253-1254.
Zhao F H, Wang D L, Zhang M P , et al. Comprehensive geophysical prediction technique for bottom buried depth of Permian in northern Songliao Basin[J]. Mineral Resources and Geology, 2018,32(1):116-121.
[8]
何继善 . 广域电磁法和伪随机信号电法[M]. 北京: 高等教育出版社, 2010,7.
[8]
He J S . wide field electromagnetic method and pseudorandom signal electrical method [M]. Beijing: higher Education Press, 2010,7.
He J S . Study on wide field electromagnetic bathymetric method[J]. Journal of Central South University: natural Science Edition, 2010,41(3):1065-1072.
Zheng B, Li D S . Comparative test of wide field electromagnetic method and magnetotelluric method in a Shale Block in southern China[J]. Oil and Gas Geophysics, 2015,13(3):45-49.
Zhan S Q, Chen Z, Li A Y , et al. Application of gravity and magnetoelectric comprehensive interpretation in oil and gas exploration in Tuquan Basin[J]. Minerals and Geology, 2017,30(1):131-137,142.
