Method for constructing hot dry rock artificial geothermal reservoir through water pressure blasting fracturing

Abstract

The invention belongs to the field of construction of dry hot rock artificial geothermal reservoirs, and particularly relates to a method for constructing a large-heat-exchange-area artificial geothermal reservoir in a dry hot rock body at low cost and high efficiency through a water pressure blasting fracturing technology for low-porosity and low-permeability deep layer dry hot rock. The method is a new concept for constructing the dry hot rock artificial geothermal reservoir based on a currently-applied huge water pressure fracturing technology. When the artificial geothermal reservoir is constructed through the water pressure blasting fracturing technology, the water pressure needed during rock body fracturing and crack expanding can be effectively increased, the density, length and width of rock body cracks (fractures) are increased, the defect that water pressure fracturing can not provide sufficient required water pressure due to device limitation is overcome, the artificial geothermal reservoir can be constructed at low cost and high efficiency, and the economic benefits of a dry hot rock geothermal development system can be improved.

Description

technical field [0001] The invention belongs to the field of hot dry rock geothermal artificial heat storage construction, and particularly relates to low-porosity and low-permeability deep-layer hot dry rocks, which are constructed in hot dry rock mass with low cost and high efficiency by using hydraulic blasting fracturing technology A method of artificial heat storage with a large range of heat exchange areas. Background technique [0002] Since the beginning of the 21st century, with the rapid development of science and technology, the proportion of energy consumption has become higher and higher. Today, primary energy such as oil and coal still dominates energy consumption, but as non-renewable energy, it will eventually be exhausted. , and the environmental pollution and ecological damage are becoming increasingly serious. Therefore, starting from the concept of healthy and sustainable development of human beings, it is particularly important to develop and utilize cl...

AI Technical Summary

Problems solved by technology

The application of hydraulic blasting fracturing technology to build artificial heat storage can effectively increase the water pressure required for rock mass cracking and crack expansion, increase the density, length and width of rock mass cracks (cracks), and overcome the limitations of hydraulic fracturing equipment Due to the disadvantage of not being able to provide sufficient water pressure, artificial heat storage can be built at low cost and high efficiency, ensuring a long service life of the hot dry rock development system, and the artificial heat storage has a high heat exchange capacity

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