Exploration Prospect Evaluation of Geothermal Resources in Shangqiu Protuberance in Southern North China Basin
CHENG Wanqing, XU Bowen, ZHU Huailiang
[Tianjin Geothermal Exploration and Development Des, China]
In this paper the magnetotelluric method was applied to study the deep stratigraphic structure in eastern region and concealed faults of Taikang Uplift. Four MT profiles had been deployed which provided 97 sounding points, the two-dimensional skewness and structural trend of the MT data used to be calculated and analyzed. The reliable underground geoelectric models were obtained by conducting two-dimensional inversion method of NLCG on the data in TM and TE mode with joint inversion. The results prove that the electrical structure of Shangqiu protuberance has typical stratification characteristics longitudinally, it can be divided into three layers from top to bottom: low resistivity layer, relatively high resistivity layer and high resistance layer. Geological map of basement rock was delineated according to the electrical structure model and integrated study of regional gravity, aero-magnetic, earthquake and geologic information. Meanwhile, two blocks of geothermal resources prospecting area were delineated on the basis of preferably correlation between abnormal high resistance caused by deep basement protuberance and high value area of regional geothermal field.
|        Topic: Geophysics||Paper Number: 13082|