Simulation experiment device for enhanced geothermal system and method for testing enhanced geothermal system reservoir thermal energy extraction rate using it

A simulated experimental device and enhanced technology, used in soil material testing, material inspection products, etc.

Active Publication Date: 2019-05-21
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a simulation experiment device for an enhanced geothermal system and a method for using it to test the heat extraction rate of the reservoir of the enhanced geothermal system, and solves how to test the heat extraction efficiency and stable production of the enhanced geothermal system under different reservoir transformation modes The technical problem of time has realized the technical effect of testing the heat extraction efficiency and stable production time of the enhanced geothermal system under different reservoir stimulation methods

Method used

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  • Simulation experiment device for enhanced geothermal system and method for testing enhanced geothermal system reservoir thermal energy extraction rate using it
  • Simulation experiment device for enhanced geothermal system and method for testing enhanced geothermal system reservoir thermal energy extraction rate using it
  • Simulation experiment device for enhanced geothermal system and method for testing enhanced geothermal system reservoir thermal energy extraction rate using it

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] This embodiment provides an injection-production method of "one injection and one production", and the fracture of the rock sample group is a main fracture, and the width of the fracture is 5mm.

[0082] S1, obtaining the shape of the fracture in the rock sample of the enhanced geothermal system, that is, the corresponding fracture of the rock sample group is a main fracture;

[0083] S2, select the rock, cut it into 32 cubic rock blocks, and the side length of the rock block is 300mm×300mm×300mm; and place it in the simulation experiment device;

[0084] S3, adjusting the proppant in the rock sample group in the simulated experimental device to form a fracture network structure corresponding to the fracture shape between adjacent rock blocks, forming the following: Figure 4 The slit network structure shown;

[0085] S4, adjust the injection flow rate of the high-pressure plunger pump in the simulation experiment device, the fluid temperature in the constant temperatu...

Embodiment 2

[0091] This embodiment provides the injection-production method of "two injections and one production", and the fractures in the rock sample group are two fractures, and the width of the fractures is 5 mm.

[0092] S1, obtaining the shape of the cracks in the rock sample of the enhanced geothermal system, that is, the corresponding cracks in the rock sample group are two cracks;

[0093] S2, select the rock, cut it into 32 cubic rock blocks, and the side length of the rock block is 300mm×300mm×300mm; and place it in the simulation experiment device;

[0094] S3, adjusting the proppant in the rock sample group in the simulated experimental device to form a fracture network structure corresponding to the fracture shape between adjacent rock blocks, forming the following: Figure 5 The slit network structure shown;

[0095] S4, adjust the injection flow rate of the high-pressure plunger pump in the simulation experiment device, the fluid temperature in the constant temperature l...

Embodiment 3

[0100] This embodiment provides an injection-production method of "one injection and one production". The fractures of the rock sample group are a main fracture and a secondary fracture, and the secondary fracture is secondary to the main fracture. The primary fracture and the secondary fracture Vertical, and the crack width is 5mm respectively.

[0101] S1, obtaining the morphology of fractures in the rock sample of the enhanced geothermal system, that is, the fractures in the rock sample group are a main fracture and a secondary fracture, and the secondary fracture is secondary to the main fracture, and the primary fracture is perpendicular to the secondary fracture;

[0102] S2, select the rock and cut it into 32 cube rock blocks, the side length of the rock block is 300mm×300mm×300mm;

[0103] S3, adjusting the proppant in the rock sample group in the simulated experimental device to form a fracture network structure corresponding to the fracture shape between adjacent roc...

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Abstract

The invention discloses a simulation experiment device for an enhanced geothermal system and a method for testing the thermal energy extraction rate of an enhanced geothermal system reservoir by using the simulation experiment device. The simulation experiment device includes: a heat exchange chamber, and the heat exchange chamber forms a A closed chamber; one side of the heat exchange chamber has an inlet communicating with the chamber, and an outlet located on the other side of the heat exchange chamber and communicating with the chamber; the rock sample group, the The rock sample group is composed of n x n x2 rock blocks, and the n x n x2 rock blocks are arranged in an arrangement of n x n x2 and placed in the chamber; the rock blocks are a cube structure with a side length of 295mm-300mm; the proppant ; Waterproof sealing plug; Electric heating plate; The invention solves the technical problem of how to test the heat extraction efficiency and stable production time of the enhanced geothermal system under different reservoir transformation modes.

Description

technical field [0001] The invention relates to the field of geothermal technology, in particular to a simulation experiment device for an enhanced geothermal system and a method for testing the thermal energy extraction rate of a reservoir of the enhanced geothermal system by using the device. Background technique [0002] Fossil energy is a kind of hydrocarbon or its derivatives. Fossil energy is currently the most important energy consumed in the world. However, the environmental problems caused by the use of traditional fossil energy are becoming more and more serious, even threatening human health and the living environment. Therefore, it is very important to strengthen the development and utilization of renewable clean energy. [0003] Among them, compared with solar energy and wind energy, thermal energy has the advantages of being unaffected by the weather, stable, and abundant in resources. At the same time, according to the temperature of the produced geothermal fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 张伟曲占庆郭天魁孙江巩法成田雨李小龙
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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