【摘要】 河南省开封地区在地下300~1600 m松散沉积物内,广泛分布低温(25~67℃)地下热水。根据区内50眼地热井(井深440~1580 m)资料,可分为6个亚热储层,并设计了各亚热储层的合理开发工程配置方案,以改进目前仅按用水需要的地热井布局。按照该设计方案,可使现状地热井的单井出水量平均增幅达到500~600 m3/d(80 m设计降深,除最深部亚热储层为14 m3/d外);现有49眼地热井的总出水量可由目前的43224.0 m3/d增加到设计开发工程配置方案下的150744.0 m3/d(110眼井)。通过模拟预报,研究区内地下热流系统在20 a开采期内,其水温变化很小,可以保证稳定、持续开采的要求。更多还原

【Abstract】 The studied area is a 300-1 600 m deep,low temperature(25-67 ℃) geothermal system in porous deposit in Kaifeng area.Based on the data of 50 geothermal wells with depths ranging from 440-1 580 m existing in the area,the geothermal system is divided into six sub heat-reservoirs.A rational exploitation engineering scheme was used to remedy the field well distribution.Under the designed scheme,the increasing ranging of geothermal water yield from actual field single well can be increased 500-600 m3/d compared with the designed single well(80 m designed water level drawdown) in sub heat-reservoirs,except in the deepest sub heat-reservoir(14 m3/d).The geothermal water output(43 224.0 m3/d) from 49 efficient actual field wells can be increased to 150 744.0 m3/d from 110 wells.During the simulated geothermal water exploitation period(20 years),water temperatures barely change in the heat-reservoir,which means the geothermal water can be exploited sustainably within 20 years.更多还原