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Double-well re-injection geothermal exploitation system based on fracturing technology

A technology for developing systems and technologies, applied in the field of dual-well recharge geothermal development systems, can solve problems such as the inability to guarantee sustainable exploitation of geothermal resources, adverse environmental and ecological impacts, and reduction of hot water content, so as to ensure sustainable development and reduce Adverse effects, the effect of improving heat transfer power

Active Publication Date: 2014-08-13
陕西圣昊朗道科技有限公司
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Problems solved by technology

It can be seen that the recharge system combined with the development method of indirect utilization of geothermal energy has great advantages, but the biggest problem of this geothermal development method is the low recharge rate of tail water, which will cause the hot water content in the heat storage to gradually decrease. The sustainable exploitation of geothermal resources cannot be guaranteed, and a large amount of tail water will have adverse effects on the environment and ecology

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  • Double-well re-injection geothermal exploitation system based on fracturing technology

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0019] see figure 1 The heating system of the present invention is composed of an underground part and a surface part. The underground part includes a water intake well 1, a submersible pump, a first reinjection well 2, a second reinjection well 3, and fractures arranged in a thermal reservoir. The specific connection relationship It is: the water intake well 1 is set between the first and second reinjection wells 2 and 3, and the water intake well 1 is connected with the first and second reinjection wells 2 and 3 respectively through the crack 3; the water intake well 1 and the first and second reinjection wells The reinjection wells 2 and 3 are both vertical wells with the same depth. The deepest part of the water intake well 1 is located in the thermal reservoir, and the water intake well 1 is equipped with a submersible pump.

[0020] The downhole part o...

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Abstract

The invention discloses a double-well re-injection geothermal exploitation system based on a fracturing technology. The double-well re-injection geothermal exploitation system based on the fracturing technology comprises a first re-injection well, a second re-injection well and a water taking well arranged between the first re-injection well and the second re-injection well, wherein the water taking well is communicated with the first re-injection well and the second re-injection well through cracks in a heat storage layer respectively; the water taking well is connected with the heat release side inlet of a heat exchanger via a sand remover, the heat release side outlet of the heat exchanger is connected with the first re-injection well and the second re-injection well respectively, and the heat absorption side of the heat exchanger is communicated with the heating pipe network of a user. Because the water taking well is communicated with the first re-injection well and the second re-injection well by virtue of the cracks in the heat storage layer respectively, and the cracks are arranged in the heat storage layer, according to the double-well re-injection geothermal exploitation system based on the fracturing technology disclosed by the invention, geothermal tail water can be completely re-injected in the heat storage layer through the cracks to ensure the sustainable development of geothermal resources, thus reducing the adverse effects of the geothermal tail water on environment and ecology; meanwhile, when the geothermal tail water flows through the cracks, the heat exchange area of a fluid and the heat storage layer is greatly increased, and the heat exchange power is increased.

Description

technical field [0001] The invention relates to a geothermal development system, in particular to a dual-well recharge geothermal development system based on fracturing technology. Background technique [0002] As a clean and renewable energy source, geothermal resources are receiving more and more attention today when people's awareness of environmental protection is becoming stronger and stronger. With the wide application of geothermal energy, the use of geothermal energy for heating / power generation has attracted more and more attention. There are two types of traditional geothermal water extraction systems: non-recharge and recharge: the non-recharge system is only equipped with a production well, and the extracted geothermal water is sent to users or used for power generation, and then discarded after use; the recharge system is set to mine Wells and reinjection wells, the water pumped out of the production wells returns to the reinjection wells after the heat is rele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J3/08
CPCY02E10/10
Inventor 王树众罗向荣吕明明景泽锋
Owner 陕西圣昊朗道科技有限公司
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