Analysis and Equilibrium Optimization of "Group Mining and Group Irrigation" Mining and Irrigation Capacity In Guanzhong Basin

As the technical support and guarantee for geothermal development, the research on the comprehensive technology of efficient recharge is still a technical problem that needs to be solved in the process of geothermal resources development and utilization. Through the fine stratigraphic division and sand layer correlation, microstructural characteristics, temperature field characteristics, fault distribution and activity characteristics of each region of Guanzhong Basin, sedimentary microfacies and sand body thickness statistical analysis; Research on sand body connectivity based on sedimentary cycle; Thermal reservoir lithology, pore structure, physical property, heterogeneity and geological evaluation; Factors influencing the difference of thermal reservoir physical properties; The controlling factors of ground temperature change were analyzed, and layer selection was carried out for mining and irrigation equalization from transverse and longitudinal perspectives. Based on the detailed description of reservoir, combined with well test interpretation, thermal reservoir connectivity and water absorption capacity research, the dynamic law of production and irrigation of thermal reservoir in the study area is established, and the reservoir connectivity and dominant seepage direction are analyzed. Carry out water absorption and liquid production profile tests to analyze water absorption capacity of different layers; Geothermal reservoir production and irrigation well pattern parameter optimization: based on model design and comparison scheme, the optimization of well type, well number, well spacing and recharge well orientation is carried out. Finally, the key understandings such as reasonable yield optimization of geothermal well, reasonable recharge flow optimization, reasonable recharge temperature optimization and optimal recharge layer analysis are formed, and a set of technical policy specifications that are suitable for optimal development of thermal storage, production and irrigation in the research area and even sandstone type are formed. This study plays a theoretical supporting role in the construction of guanzhong Basin engineering project in Shaanxi province.