Distribution characteristics and controlling factors of geothermal field in Zhecheng, Shangqiu

This paper is the results of geothermal energy.[Objective]Zhecheng, Shangqiu, is located in a sedimentary basin, the Cenozoic deposits are thic, the thermal reservoir cap rock is good, the thickness of thermal sand layer is relatively large, so it has a good prospect of thermal storage. [Methods] Based on temperature data from 33 boreholes around Zhecheng, and more than 80 borehole geological data and regional 2-d seismic exploration results, the geological structure and geothermal field in this area are analyzed.[Results]This study clarified the cenozoic thickness and geological structure distribution in the study area, and analyzed the development history of geological structure.Through the analysis of borehole temperature measurement data, the geotemperature gradient and distribution law of geotemperature in this region are determined.The main factors controlling temperature distribution in the study area are analyzed. The distribution law of geotemperature gradient in Cenozoic and bedrock,thermal reservoir location and favorable geothermal target area are obtained, [Conclusions] the study shows that the difference of the earth temperature distribution is mainly controlled by the basement structure.The origin of the Cenozoic heat storage is mainly conduction type, and the conduction-convection-conduction plays a major role in the vicinity of bedrock and fault zone.