Abstract
Understanding heat production performance is crucial for the development and utilization of geothermal reservoirs. This study investigates the heat production characteristics of a geothermal heating system in naturally fractured reservoirs of the Guide Basin in China while considering the heterogeneity and anisotropy of the reservoir. A 3D discrete fracture network (DFN) model is established based on the fracture information obtained from Guide Basin and then the permeability at different locations in the model is calculated. Finally, the calculated permeability is used to analyze heat production performance using TOUGH2. The results indicate the cumulative heat production in 40 years is 987 GWh, which is equivalent to the heat produced by 1.48×108 kg of standard coal. The proposed methodology, which considers the heterogeneity and anisotropy of the reservoir, combines the advantages of the DFN model and continuous medium model and can be used to analyze other geothermal reservoirs.
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