Study on the influence law of well location and water injection displacement on heat extraction performance of EGS

The enhanced geothermal system (EGS) is the key to improving heat production efficiency of hot dry rock (HDR). Due existence EGS, reservoir produces significant heterogeneity, so optimal design well location and injection rate has an important influence on recovery effect EGS. To solve this problem, a calculation model for output EGS under multifield coupling established in paper, different scales deeply analyzed. results show that displacement have great fracture-network scales. larger size fracture network, effective utilization area better recovery. closer network direction is, is. higher research guiding significance optimization scale, placement, water HDR reservoir.