Exploitation method of communication well of geothermal energy bore well

Abstract

The invention provides an exploitation method of a communication well of a geothermal energy bore well. At least one general vertical well of the bore wells is used as the target well having the appointed well depth, and a technical sleeve is installed to fix the well; the other oriental horizontally butted well is bored at a certain distance, and the oriental horizontally butted well sequentially comprises a vertical section, an incline section and a horizontal section, wherein the horizontal section is butted and communicated with the bottom of each of the target wells, or the horizontal section is butted and communicated with the bottom of each of the target wells by compression fracture technique when reaching the target area at the bottom of the target well. The bottom of the target well is expanded by a way of bit hole-expansion or well bottom explosion; preferably the diameter of the target well is larger than 200 mm. The invention ensures that two (or more) holes (wells) are communicated, and water is injected into one (or more) well, the water at normal temperature performs the heat exchange with the geothermal resource underground through a drilling passage, and then theother well(s) can produce high-temperature hot water. The invention has the advantages that the exploitation method is not influenced by the landform and the slotted rock stratum.

Description

technical field [0001] The invention relates to the field of exploitation and development of underground thermal energy, is applicable to geothermal fields with or without hot water or geothermal pressure, and is especially suitable for the development and utilization of dry heat geothermal sources. Background technique [0002] Exploitation of underground hot dry rock resources, whether there is underground hot water resources or not, can be used to develop underground thermal energy, which can greatly save energy consumption, reduce traditional energy such as coal and oil, create wealth for human beings, and cause pollution to the environment. Geothermal fields simultaneously minimize impacts on land subsidence and groundwater. [0003] At present, people's development and utilization of underground hot dry rock is mainly for power generation. Developed countries such as the United States, France, Germany, Japan, Italy and the United Kingdom have mastered the basic princi...

AI Technical Summary

Problems solved by technology

Due to the influence of the distribution of underground fissures, it may also cause water penetration loss of injected water and affect the utilization rate of water

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