天津市滨海新区东丽湖地区基岩热储回灌研究  

Researches on the reinjection of Dongli Lake bedrock reservoir in Binhai New Area,Tianjin

作　　者：阮传侠[1,2] 沈健[2] 李立亮[2] 刘荣光[2] 牟双喜 RUAN Chuanxia;SHEN Jian;LI Liliang;LIU Rongguang;MOU Shuangxi(School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China;Tianjin Geothermal Exploration and Development Designing Institute, Tianjin 300250, China)

机构地区：[1]中国地质大学(北京)水资源环境学院,北京100083 [2]天津地热勘查开发设计院,天津300250

出　　处：《地质通报》2017年第8期1439-1449,共11页Geological Bulletin of China

基　　金：天津市国土资源和房屋管理局项目<天津市滨海新区东丽湖地区基岩热储保护工程>(编号:国土房任[2010]12号);国家自然科学基金项目<天津地区地热田热储压力分析及研究意义>(批准号:41502256)

摘　　要：天津市滨海新区东丽湖地区雾迷山组热储层为该区主要开发利用热储层,共有11眼地热井,由于集中开发利用,静水位埋深以每年3m速度下降。为了缓解水位下降,目前利用地热流体尾水进行回灌,水位埋深下降仍然较快。东丽湖地区有丰富的地表水水源,为增加回灌量,在丰水期利用处理后的湖水开展集中回灌,建成集中回灌系统。为研究集中回灌后研究区的动力场和温度场特征,在本区开凿1眼回灌井,进行回灌试验,确定该井的最大回灌率为152m^3/h。建立研究区的数值模型,模拟供暖季和非供暖季2种回灌方式下的动力场和温度场特征。供暖季回灌量为30×104m^3/a,平均到供暖季120d,回灌水温20℃,自然回灌方式;非供暖季采用湖水回灌,回灌量为40×104m^3/a,平均到丰水期120d,回灌水温20℃,自然回灌方式。在无湖水回灌和有湖水回灌条件下,预测1a和5a后研究区的动力场和温度场特征,结果表明,增加湖水回灌可减缓热储层压力下降速率,对温度场不会产生明显影响。The Wumishan Formation is the main development and utilization reservoir in the Donglihu district of Binhai New Area,Tianjin.There are11geothermal wells,and static level falls by the depth of3m annaully due to the concentrated development and utilization.For the purpose of alleviating water level falling,geothermal fluid waste water has been used for reinjection;nevertheless,the falling of the water level remains relatively fast.The Dongli Lake area is rich in surface water,the treated lake water is used for reinjection to increase the amount of reinjection in rich water period,and the concentrated reinjection system has been built in this area.A reinjection well was digged to carry out reinjection test and the largest reinjection of the well is152m3/h.TOUGH2.0software is adopted to establish the numerical model in the study area and simulate dynamic field and temperature field characteristics of two kinds of reinjection mode under the condition of the heating period and non-heating period.Reinjection rate is30×104m3/a in the heating period averagely for120days,the reinjection water temperature is20℃and the natural reinjection modde is adopted.The reinjection rate is40×104m3/a in the non-heating period for averagely120days,the reinjection water temperature is20℃and the natural recharge mode is adopted.This paper forecasts the dynamic field and temperature field characteristics of the study area under the conditions of the absence of lake water reinjection and the existence of water injection for1year and5years.The results show that increasing lake water reinjection can reduce heat reservoir pressure dropping rate and has no sig?nificant influence on the temperature field.

关 键 词：天津 地热资源 回灌 模拟和预测 

分 类 号：P314[天文地球—固体地球物理学]