Research on Multi-parameter Collaborative Optimization Mechanism of Geothermal Development in Medium-Deep Sandstone Reservoirs

In view of the unique plane distribution law and vertical superposition characteristics of deep sandstone geothermal reservoirs, Jidong Oilfield innovatively constructed a ‘cluster three-dimensional development’ technical system. Through the establishment of a ‘plane intensive well pattern-layer differentiation development’ collaborative development model, the horizontal dimension adopts a cluster well pattern layout to enhance the reservoir contact area, the vertical dimension implements multi-level layer optimization to improve the reservoir utilization efficiency, and the time dimension establishes a dynamic control mechanism to ensure continuous production capacity, which effectively realizes the dual improvement of reservoir space utilization rate and thermal energy exploitation efficiency. Based on the parametric characterization method of thermal reservoir engineering, combined with on-site dynamic monitoring data and multi-field coupling numerical simulation technology, this study focuses on the analysis of the synergy between key technical parameters such as well location deployment optimization strategy, completion process adaptation criterion and productivity regulation mechanism, and forms a parameter optimization decision method based on reservoir response characteristics. The research results have been successfully applied to the mine, and provide scientific basis and technical guidance for the development of medium-deep sandstone geothermal resources.