A Study Of The Technology For Geothermal Reservoir Reinjection Using Surface Water In The Dongli Lake Of Tianjin

Tianjin city is rich in geothermal resources, the development and utilization of geothermal resources in our country is one of the earlier.Geothermal has become an important member of tianjin environmental protection energy, geothermal resources development and utilization of the scale and level are located in the forefront of the country.As the economic centre of northern China, tianjin there is an upward momentum in the demand for geothermal resources,as demand increased, however, the geothermal resources is also increasing, thermal reservoir pressure decreases obviously, affected the sustainable development and utilization of geothermal resources.In order to protect the geothermal resources, we took a variety of technical measures to increase the geothermal fluid reinjection amount, and the reinjection in surface water is one of them.Many places in tianjin,surface water is very rich in the plentiful.So,select a suitable location,through the technology to deal with surface water,to make it satisfy the requirements of the reinjection,it willeffectively increase the recharge recharge of geothermal resources.Surface water reinjection is to adapt to economic development in our city of geothermal resources in the process of increasing demand and put forward a new technology to supply heat reservoir, for the protection of the geothermal resources has opened up a new road, has the high demonstration and popularization value.Dongli Lake tourist area with abundant surface water resources is the core area of the Shanlingzhi geothermal fields, as well as the upstream region of Tianjin bedrock heat reservoir supplies. If the water of the lake can meet the requirements of geothermal reinjection through scientific treatment, the amount of the geothermal fluids reinjection of this area can be increased and the supply of geothermal reservoir in the concentration exploitation area of geothermal fields can be dramatically enhanced. The project collected the existing geological datas and technological achievements of reinjection test, selected Jixian system Wumishan formation heat reservoir as the target layer of surface water reinjection, and develop a viable reinjection test program. Based on the early field reconnaissance, field research, water samples analysis, simulation test and a series of preparatory work, the location of reinjection well and the water treatment process were finally determined, and the surface water reinjection test base was established. The surface water was pretreated with the application of advanced technology and equipment and the perfect process, ultimately achieved the quality standards of reinjection water. The project had a study on reinjection technical method through a phased reinjection test, achieved a maximum surface water irrigation amount of 152m3/h. This will have important significance on the future reinjection work and promoting sustainable development and utilization of geothermal resources in Tianjin.