Abstract:As the core infrastructure for the development and utilization of geothermal resources, the quality control of supervision during the construction phase directly determines the well completion qualification rate, the stability of water production parameters, and the long-term operational safety. Aiming at the problems such as complex construction technology and uncertain geological conditions of geothermal wells, this study takes the JH-34 geothermal well in Jinghai District, Tianjin as an engineering case, and innovatively constructs a three-dimensional supervision quality control system of "goal orientation - process control - result verification". Through the systematic implementation of pre-construction preparation control, process management of 6 core links, and closed-loop acceptance management, this study focuses on solving the quality control difficulties in key processes including drilling, directional drilling, well logging, cementing, well flushing, and productivity testing. Practice shows that through optimized measures such as standardized supervision processes, dynamic parameter monitoring, and emergency response linkage, the system has achieved excellent results: 100% well completion quality compliance rate and water production parameter deviation ≤ ±1%. It provides a replicable quantitative control standard for the supervision of sedimentary basin-type geothermal well projects in Tianjin, and has important practical value for promoting the sustainable development of geothermal resources and the implementation of the "dual carbon" strategy.
