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

A technology of hydraulic blasting and hot dry rock, which is applied to drilling equipment and methods, earthwork drilling, mining fluids, etc. It can solve problems such as increasing water pressure, increasing the length and width of rock mass cracks, and achieving greater Density, low cost effect

Active Publication Date: 2017-02-22
TAIYUAN UNIV OF TECH
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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...

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

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Embodiment Construction

[0023] Attached below figure 1 , figure 2 The present invention is further described.

[0024] In a hot dry rock geothermal development and utilization project, hydraulic blasting and fracturing technology was used to construct artificial heat storage. The specific steps are as follows:

[0025] (1) Determine the layout plan of the well group according to the geological data of the hot dry rock geothermal development zone, and determine the location and construction plan of the injection well 1.

[0026] (2) Construction of the injection well 1, when the construction of the injection well 1 reaches the target layer where the temperature of the rock mass is above 200°C, stop drilling.

[0027] (3) Construction monitoring equipment installation well 2. A monitoring equipment installation well 2 with a relatively shallow drilling depth about 100m away from the injection well 1 is used to install the sensor 8, and a complete set of microseismic monitoring system 9 is installed...

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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...

Claims

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Application Information

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IPC IPC(8): E21B7/00E21B43/263
CPCE21B7/00E21B43/263
Inventor 郤保平李广林崔继明冯增朝赵阳升
Owner TAIYUAN UNIV OF TECH
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