Heat storage structure and accumulation of deep geothermal in Jizhong Depression

Abstract

The deep structure of Jizhong Depression shows a stepped descending pattern in east-west trend and three sections sinking in north-south trend. The subsidence is roughly uniform in the north-south sections, and the largest subsidence is in the middle section. The heat storage distribution of deep carbonate rocks is strictly controlled by convex-concave structure, the burial depth of the carbonate rocks varies greatly in different tectonic units. Deep geothermal occurs in the thick Cenozoic overlying part of the thick reservoir which beside structure-magmatic belt. mantle uplift + rock mass + fault + carbonate + Cenozoic thick overburden jointly control the distribution of deep hot fields/Wells (groups).