可再生能源2026，Vol.44Issue(1)：52-59,8.
单裂隙增强型地热储层的产热能力数值模拟分析
Numerical simulation analysis of heat production capacity of single fracture enhanced geothermal reservoir
摘要
Abstract
Influenced by anisotropic in-situ stress and natural fractures,deep geothermal reservoirs often exhibit preferential fracture development during hydraulic stimulation,resulting in the formation of artificially created geothermal reservoirs that approximate a single-fracture system.Whether such single-fracture geothermal reservoirs can provide commercially viable thermal energy remains a topic of considerable debate.This paper,based on the assumption of a single-fracture geothermal system,investigates the system's heat generation capacity under the influence of varying fracture structural parameters and well location parameters.The simulation results indicate that reducing the fracture aperture from 1.0 to 0.1 effectively delays thermal breakthrough and decreases the heat loss rate by 37.7％.Furthermore,increasing the distance between injection and production wells from 141 m to 424 m,or optimizing the injection flow rate from 1 m3/min to 3 m3/min,enhances the system's heat recovery capacity by 3.1 MW and 10.6 MW,respectively.With detailed characterization of fracture structures and optimization of well field configurations,single-fracture geothermal systems can achieve favorable thermal recovery performance.Assuming a horizontal fracture with an aperture less than 0.1 mm,the system can maintain a thermal loss rate of less than 15％over 30 years of operation and sustain a heat extraction capacity above 12 MW,under the conditions that the well spacing exceeds 420 m,the injection rate is below 1 m3/min,and the injection temperature is above 30.0℃.关键词
增强型地热系统/单裂隙/产热能力/数值模拟Key words
enhanced geothermal system/single fracture/heat extraction capacity/numerical simulation分类
能源科技引用本文复制引用
张晨雨,姜振蛟,王金鑫,李思源,黄亮..单裂隙增强型地热储层的产热能力数值模拟分析[J].可再生能源,2026,44(1):52-59,8.基金项目
国家自然科学基金(3A4213192425). （3A4213192425）
