山东省郓城县岩溶热储回灌试验

近年来,随着地热资源利用规模的不断提高,郓城县岩溶热储水位呈逐年下降趋势,并产生了热污染等地质环境问题。为查明郓城县岩溶热储回灌能力,保障地热资源可持续开发利用,开展了同层对井回灌试验和示踪试验,并对水质、水温、水位进行了监测。结果表明,回灌对热储层的水位、水质、水温影响小,岩溶热储层内水力联系强,热水运移速度为10.46 m/h,回灌水水温对热储层最大自然回灌量影响较大,当开采量小于130 m~3/h时,回灌率可达100%,回灌条件适宜。

Experimental Study on Karst Geothermal Reservoir Reinjection in Yuncheng County of Shandong Province

In recent years, with the continuous improvement of the scale of geothermal resources utilization, the geothermal water level in Yunchengcounty has been declining year by year, and has caused many geological problems, such as thermal pollution. In order to find out the ability of karst geothermal reservoirs reinjection, and ensure sustainable development and utilization of geothermal resources in Yuncheng county, the injection test and tracer test at the same layers of wells have been carried out, and water quality, water temperature and water level have been monitored. It is showed that the influence of recharge on the water level, water quality and water temperature of the reservoir is small, the water contact in the karst thermal reservoir is strong, and the velocity of hot water migration is 10.46m/h. The recharge water temperature has a great effect on the maximum natural recharge of the reservoir. When the extraction is less than 130m3/h, the reinjection rate is up to 100%, and reinjection condition is suitable.