Evaluation of the Modification Potential for Carbonate Geothermal Rocks by considering Multiple Mechanics Properties and Acid Dissolution in the Jizhong Depression, China

Abstract Evaluation of geothermal reservoir modification potential is great significance for improving the efficiency exploitation and reducing costs. However, it difficult to accurately evaluate given limited number parameters used in practical studies. Therefore, an evaluation method that considers development by applying multiple essential. In this study, five types rock samples are collected field from Fujunshan Formation, Gaoyuzhuang Majiagou second fourth groups Wumishan Formation. The uniaxial compressive strength (UCS) tensile (UTS) were obtained compression tests Brazilian splitting tests, followed calculation brittleness index utilizing UCS UTS. Then, joint roughness coefficient crack width 3D scanning postprocessing. addition, fracture extension degree each lithology was via acid dissolution experiments. Analytical hierarchy processes (AHP) associated with expert experience adopted under hydraulic stimulation etching based on above parameters. results show carbonate rocks Formation prone cracking, efficient flow heat exchange, sensitive dissolution, thus have highest modification. proposed implemented case study can provide a reference solid base further applications.