PDF(5389 KB)
Geothermal Resources Evaluation Based on 3D Geological Modeling: The Case of Shidian Geothermal Area
Zhao Jie, Guo Qinghai
PDF(5389 KB)
PDF(5389 KB)
Geothermal Resources Evaluation Based on 3D Geological Modeling: The Case of Shidian Geothermal Area
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Although it is simple to evaluate geothermal resources using the traditional thermal reservoir method, the deviation of the evaluation results is usually large. Taking the Shidian geothermal field as a typical study area, a 3D geological model showing the distribution of geothermal reservoirs and caprocks in the area was built, using GMS software on the basis of geological and geothermal geological conditions in the region, combined with geophysical and drilling data. Considering the differences in the evaluation parameters of geothermal resources, the study area is divided into 9 sub-areas according to the thermal storage temperature, and the thermal reservoir volume is calculated in combination with the established three-dimensional geological model, and the improved thermal storage method is used to accurately and dynamically evaluate the study area. The heat stored in geothermal waters of the study area was calculated to be 1.38×1017 J, the heat stored in thermal storage rocks was 1.49×1019 J, and the total geothermal resources was 1.5×1019 J. According to the calculation results of the extractable amount of geothermal water, as well as the reasonable development and utilization of geothermal water resources in Shidian, 4.36×107 t of standard coal can be saved annually. This study provides a new mode for the scientific and rational evaluation of geothermal resources in Shidian.
3D geological modeling / geothermal resource evaluation / GMS / Shidian / geothermal water resources
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