| The unit volume method is a commonly used method for geothermal resource evaluation, which usually involves inscribing the parameters on a two-dimensional plane and accumulating the total amount after calculating the parameters of each unit, which reduces the calculation accuracy and is cumbersome for the study area that is too large and irregular in scope. Therefore, in this study, based on the rich geological data of Shixi Oilfield, we use the ground temperature parameter to simulate into porosity, establish Petrel property model (i.e., ground temperature field model) to optimize the unit volume method, realize the fine inscription of the relevant parameters on the three-dimensional plane, and automatically derive the product of the temperature difference and the volume, which can be directly used for the subsequent calculations. The optimized unit-volume method calculates the geothermal resources in the study area at a depth of 10 km to be 2521.58×1018 J, which is 12.57% lower than that calculated by the thermal storage method based on the COMSOL Multiphysics model, and the optimized unit-volume method highlights the inhomogeneity of the temperature of the thermal storage and the accuracy of the volume estimation, and improves the computational efficiency and computational accuracy; based on the geothermal model The distribution characteristics and main controlling factors of the present-day geothermal field are analyzed, and the two wells A and B and the surrounding areas in the study area are preferred as favorable zones. This study clarifies the potential and distribution pattern of geothermal resources in Shixi Oilfield, and provides scientific basis for the rational utilization of geothermal resources in the study area. |