However, the Enhanced Geothermal Systems with a fracturedreservoir undergoes several practical issues, such as the huge de-mand for water, large pressure drop through the fractured reser-voir, corrosion and scaling in thewellbores due to the direct contactof the working fluid with the reservoir rock surface, the mass flowloss into the reservoir and the challenge of choosing productionwell drilling location due to the difficulty in controlling the fracturechannels. For instance, in Rosemanowes project in UK, when theinjection ratewas 5 l/s, the return fromthe productionwell was 4 l/s; when 24 l/s was injected, only 15 l/s was produced [5]. In Hijioriproject, the production wells had to be cleaned-out due to scalingproblems and the flow rate loss was as high as 45% during long-term test from 2000 to 2002. The test was finally stopped due tothe drop in production temperature which was larger than thenumerically predicted temperature drop [5]. Therefore, an idealgeothermal exploitation method should have a comprehensiveadvantage on generating efficiency, pressure drop, environmentalimpact, cost, and flow rate loss. Currently, the field-scale heatextraction efficiency and generating efficiency can merely be ob-tained through simulation tools. However, the heat transfermodelsin the complex subsurface structures were still insufficient [4], andno EGS reservoir has been operated for a sufficient period of time tocung cấp các dữ liệu cần thiết để xác nhận một mô hình mô phỏng [2]. Điều nàymang lại nhiều điều trên EGS với hồ chứa nước bị vỡ khi cácKênh bị gãy dẫn đến các hành vi không chắc chắn của flow và hồ chứaTheo khai thác năng lượng lâu dài.
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