天津市滨海新区东丽湖地区基岩热储回灌研究

天津市滨海新区东丽湖地区基岩热储回灌研究

阮传侠;沈健;李立亮;刘荣光;牟双喜

【期刊名称】《地质通报》

【年(卷),期】2017(36)8

【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152m3/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30×104m3/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40×104m3/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 are 11

geothermal wells,and static level falls by the depth of 3m annaully due to

the concentrated development and utilization.For the purpose of

alleviating water level falhng,geothermal fluid waste water has been used

for reinjection;nevertheless,the falhng 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 is 152m3/h.TOUGH2.0 software is adopted to

estabhsh 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 is 30 × 104m3/a in the heating period averagely for

120 days,the reinjection water temperature is 20℃ and the natural

reinjection modde is adopted.The reinjection rate is 40× 104m3/a in the

non-heating period for averagely 120 days,the reinjection water

temperature is 20℃ 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 for 1 year and 5 years.The results show

that increasing lake water reinjection can reduce heat reservoir pressure

dropping rate and has no significant influence on the temperature field.

【总页数】11页(P1439-1449)

【作 者】阮传侠;沈健;李立亮;刘荣光;牟双喜

【作者单位】中国地质大学(北京)水资源环境学院,北京100083;天津地热勘查开发设计院,天津300250;天津地热勘查开发设计院,天津300250;天津地热勘查开发设计院,天津300250;天津地热勘查开发设计院,天津300250;天津地热勘查开发设计院,天津300250 【正文语种】中 文

【中图分类】P314

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