Geothermal Resource Evaluation under Non-Homogeneous Thermal Reservoir Properties in Xiong'an New Area
Identifying geothermal property characteristics and accurately assessing geothermal resource potential are crucial foundations for achieving precise zoning and large-scale,efficient development and utilization of geothermal energy.Xiong'an New Area,one of the typical low-temperature geothermal systems in the North China plain,is selected as the study area.The study aims to obtain the thermal reservoir properties of the Wumishan Formation,predict the three-dimensional temperature distribution,improve the resource assessment algorithm,and evaluate the geothermal resource potential under heterogeneous conditions for various thermal properties and stratigraphic parameters.The research results indicate that the geothermal resource quantity of the Wumishan Formation above 5 000 m is equivalent to 3.219 5×105 million tons of standard coal.Using the balanced injection and production method,the calculated extractable geothermal fluid resource quantity is 436.64×106 m3 per year,equivalent to 508.217 4 thousand tons of standard coal in extractable heat.The extractable resource quantity and heat calculated by the balanced injection and production method are 48.7 times and 50.3 times greater,respectively,than those calculated using the extraction coefficient method.The geothermal resource per unit area and the geothermal fluid resource per unit area are the largest in the Rongcheng area.The calculated resource indicators under heterogeneous conditions are 2.29 to 2.95 times higher than those under homogeneous conditions.
geothermal resource evaluationheterogeneous conditionstemperature field predictiongeothermal property identificationXiong'an New Areaphysical geographyenvironmental geology
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