Method of circular mining geothermal resources

Abstract

The invention relates to a method of circular mining geothermal resources. The method comprises following steps: (1) an area with a relatively-high geothermal gradient is confirmed; (2) a reservoir stratum in the area with the relatively-high geothermal gradient is confirmed; (3) well positions of two wells are confirmed along a main extending direction of the reservoir stratum, well drilling is conducted, one well is arranged on a relatively-low position of the reservoir stratum and is a water inlet well, and the other well is arranged on a relatively-high position of the reservoir stratum and is a water outlet well; (4) the water inlet well and the water outlet well are all drilled on the reservoir stratum, then perforation is conducted on the same reservoir stratum segment, a reservoir stratum channel is obtained, and the water inlet well is communicated with the water outlet well through the reservoir stratum; (5) on the ground, ground surface fresh water is injected from the water inlet well, the ground surface fresh water passes through the reservoir stratum channel, then hot water after heated is obtained, hot water after heated flows into the water outlet well, and then the hot water is sent to the water outlet well.

Description

Technical field [0001] The invention relates to a method for recycling geothermal resources. Background technique [0002] "Geothermal" refers to the abbreviation of buried thermal energy resources that can be economically utilized by humans. The earth’s thermal field is also called the earth’s temperature field or geothermal field. It and the earth’s electric field, gravitational field, and magnetic field are all earth’s physical fields. The geothermal field represents the distribution of temperature in the various layers of the earth's interior. The temperature distribution and thermal field characteristics of the various layers of the earth are different. Generally speaking, the thermal field refers to the part that can be directly measured in the upper layer of the earth. [0003] As a new energy source, geothermal resources have long attracted the attention of countries all over the world. Geothermal resources are a precious natural resource. Someone once estimated that th...

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Problems solved by technology

[0012] One is the use of coal to generate serious pollution, and the cost is relatively high. The total annual coal consumption (including coal power generation and heating) is 1 billion tons, conservatively calculated at 500 yuan per ton, which is 500 billion yuan;

[0013] The second is that the use of geothermal heat is only to get hot water from the ground, and although the amount of underground hot water is relatively large, it is also limited

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