Evaluation of Geothermal Resources in Southern Area of Gaoqing County
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Abstract:
The geothermal reservoir in the southern area of Gaoqing County consists mainly of two formations: Neogene Guantao Formation and Palaeogene Dongying Formation. According to the field observation and laboratory analyses，reasonable parameters were selected to develop the geothermal reservoir concept model. On the basis, the heat reservoir method and recovery rate method were used to calculate and evaluate the total and available geothermal resources in the study area, respectively, and the volume method and maximum drawdown method were used to evaluate the storage capacity and allowable withdrawal of underground hot water resources. The results showed that the total geothermal resources quantity is 2.5161 x 1018 J, equal to 8.587 x 107 t of standard coal, and the available geothermal resources is 6.290×1017J, equal to 2.147×107t of standard coal (recovery rate is 25%). Also, the underground hot water storage capacity is 6.542 x 109 m3, and the allowable withdrawal is 3.833 x 106 m3/a based on a production life of 100 years.
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