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Deep well system for enhanced geothermal system and drilling method thereof

An enhanced, deep well technology, applied in the field of deep well systems, can solve problems such as sharp increase in overall cost, and achieve the effect of reducing overall cost and reducing increase

Inactive Publication Date: 2016-02-03
KOREA INST OF GEOSCI & MINERAL RESOURCES
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, since three wells need to be drilled from the surface, there is a problem that the overall cost for deep well drilling and hydraulic stimulation increases dramatically

Method used

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  • Deep well system for enhanced geothermal system and drilling method thereof
  • Deep well system for enhanced geothermal system and drilling method thereof
  • Deep well system for enhanced geothermal system and drilling method thereof

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Experimental program
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Embodiment Construction

[0031] The formation, connection structure and drilling method of deep wells for enhanced geothermal systems (EGS) related to the present invention will be described in detail below with reference to the accompanying drawings.

[0032] figure 2 is a conceptual diagram showing an enhanced geothermal system (EGS) having a deep well system 100 related to the present invention.

[0033] The deep well system 100 disclosed in this example constitutes a closed cycle based on the injection well 110 and the production well 120 drilled from the ground to the deep underground, the pump system 130 and the power plant 140 installed on the ground. The injection well 110 and the production well 120 are respectively drilled from the ground at the designated location to the deep underground where there is high-temperature rock as a heat source. After heating, it is pumped back to the pump system 130 .

[0034] In contrast to the injection well 110 having a single bottom hole, the production...

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Abstract

The invention relate to a deep well system used for an enhanced geothermal system (EGS). The system comprises a first deep well which is formed with a first bottom hole, a second deep well which drills at a distance from the first deep well and is provided with a second bottom hole and a third bottom hole, a first artificial retention layer, a second artificial retention layer, and a third artificial retention layer. The first bottom hole is disposed between the second bottom hole and the third bottom hole. The first artificial retention layer is formed on the first bottom hole through hydraulic stimulation. The second artificial retention layer is formed on the second bottom hole through hydraulic stimulation. The third artificial retention layer is formed on the third bottom hole through hydraulic stimulation, and the third artificial retention layer is connected with the first artificial retention layer and the second artificial retention layer.

Description

technical field [0001] The present invention relates to a deep well system for an enhanced geothermal system (EGS) and a drilling method thereof to increase geothermal productivity at low cost. Background technique [0002] In terms of natural resources, geothermal energy is so huge that it can reach hundreds or thousands of times the overall energy consumption throughout the year. Therefore, the enhanced geothermal system (Enhanced Geothermal System; EGS) is used to reduce carbon dioxide emissions and sustainable The supply of new renewable energy has attracted much attention. [0003] The enhanced geothermal system is a technology that improves the high-temperature rock mass (HotDryRock; HDR) as the object. When the temperature is sufficient but there is no geothermal reservoir with the required flow rate for power generation because there is no fluid or low permeability, artificially Technology that increases permeability to create systems that generate electricity. Gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24J3/08E21B7/00
CPCY02E10/10F03G7/04
Inventor 千大成朴灿崔炳熙
Owner KOREA INST OF GEOSCI & MINERAL RESOURCES
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