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The method of collecting thermal energy of dry hot rock by single well

A dry-hot rock and thermal energy technology, applied in geothermal power generation, collectors using groundwater as working fluid, and exploitation fluids, etc. The effect of production costs

Active Publication Date: 2022-02-08
深圳市广域鹏翔研究开发有限公司
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Problems solved by technology

[0003] Based on this, the present invention aims at the technical problems that it is difficult to control the extension and connection of fractures and the economic benefits are not obvious in the hydraulic fracturing method for mining hot dry rock, and provides a method for collecting heat energy of dry hot rock by using a single well

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  • The method of collecting thermal energy of dry hot rock by single well
  • The method of collecting thermal energy of dry hot rock by single well
  • The method of collecting thermal energy of dry hot rock by single well

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Embodiment Construction

[0027] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific implementations disclosed below.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a...

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Abstract

The present invention relates to a method for collecting thermal energy of dry hot rock by using a single well, comprising: S1, drilling at least one well, and drilling into the target layer in the well and then continuing to drill the well for more than 500m; S2, establishing a well within a certain range of the well Three-dimensional three-dimensional stress distribution law; S3. Obtain the stress field and rock mechanical properties according to the three-dimensional three-dimensional stress distribution, and then calculate the relationship between the amount of explosives required and the blasting volume, and calculate the distance and direction of perforation intervals; S4. Put explosives into perforations In the method, blasting is carried out along the main stress direction of the formation to form fractures perpendicular to the well in the formation, and the fractures are connected to each other; S5. Carry out secondary drilling on the target layer, and put the pump into the well to realize The collection of heat energy. The method is a high-efficiency, simple and complete method for exploiting hot dry rock thermal energy.

Description

technical field [0001] The invention relates to the technical field of energy exploitation, and more specifically relates to a method for collecting thermal energy of dry hot rocks by using a single well. Background technique [0002] Geothermal energy is a clean, stable, safe and efficient renewable energy, especially the deep hot dry rock resources are huge and widely distributed. The key technology of hot dry rock development is to fracturing and collecting hot dry rock mass. The purpose of hot dry rock fracturing is to increase the rock permeability so that the "underground heat exchanger" has a larger heat exchange area. The commonly used methods are artificial hydraulic fracturing and chemical fracturing, that is, by injecting a certain volume of water, high pressure causes rock fractures to open, extend and intersect to form a connected fracture network, similar to a natural geothermal heat reservoir. The traditional geothermally enhanced hydraulic fracturing method ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/263F24T10/20
CPCE21B43/263F24T10/20Y02E10/10
Inventor 何继善凌帆
Owner 深圳市广域鹏翔研究开发有限公司
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