Test method for geological storage of carbon dioxide coal seams

A carbon dioxide and test method technology, applied in the field of carbon dioxide coal seam geological storage

Inactive Publication Date: 2013-09-04
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

On the one hand, it cannot reflect the structural characteristics of coal seams rich in cleavage fractures; on the other hand, it cannot reflect the in-situ stress and geothermal conditions of deep coal seams.

Method used

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  • Test method for geological storage of carbon dioxide coal seams

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0019] Implementation mode 1: The test device consists of four major systems: geological environment simulation system, fluid injection system, fluid extraction system and test control system. The environment simulation system is composed of pressure sensor 6, temperature sensor 7, confining pressure loading subsystem 8, axial pressure loading subsystem 9, temperature control subsystem 10, holder 11 and osmotic pressure control subsystem 12; holder 11 Placed inside the temperature control subsystem 10; the confining pressure loading subsystem 8 and the axial pressure loading subsystem 9 lead into the middle and both ends of the holder 11 through pipes, and provide high-pressure fluid for the oil cylinders at both ends and the middle of the holder respectively The pressure sensor 6 measures the pressure of the fluid passing into the holder 11 and transmits the measurement data to the computer; the temperature sensor 7 measures the temperature of the holder 11 and transmits the...

Embodiment approach 2

[0029] Implementation mode 2: The test device can meet the test requirements for simulating the geological storage of carbon dioxide in a 3800m deep coal seam. 20% of the water volume is injected into the test piece, and the test piece is heated to 110°C through the temperature control subsystem, and the heating axial pressure and confining pressure subsystems provide the test piece 100MPa pressure, inject gas and carbon dioxide into the test piece successively, the injection pressure of carbon dioxide and gas is 45Mpa, and analyze the product, other is the same as embodiment 1.

Embodiment approach 3

[0030] Implementation mode 3: The test device can meet the test requirements for simulating the geological storage of carbon dioxide in a 4800m deep coal seam. 30% of the water is injected into the test piece, and the test piece is heated to 140°C through the temperature control subsystem, and the axial pressure and confining pressure subsystems provide the test piece with 120MPa Pressure, gas and carbon dioxide are injected into the test piece successively, the injection pressure of carbon dioxide and gas is 55Mpa, and the product is analyzed, the other is the same as that of Embodiment 1.

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Abstract

The invention relates to a test method for the geological storage of carbon dioxide coal seams and belongs to the technical field of greenhouse gas geological storage. The test method is characterized in that a device adopted by the test method is a large-size test piece capable of being packaged under high pressure and the test piece can be used for simulating the geological environmental conditions of the coal seams with the bury depth up to 4800m, wherein the size of the test piece is 200mm*200mm*400mm; the axial pressure and the confining pressure of the test piece can be up to 120MPa respectively; and the environment temperature of the test piece is up to 200 DEG C. The test device comprises four systems i.e., a geological environment simulating system, a fluid injecting system, a fluid extracting system and a test control system. According to the test method disclosed by the invention, the newly-developed test device for the geological storage of the carbon dioxide coal seams is utilized to simulate the geological conditions of the coal seams with large burial depth, so that the shortcomings that existing test devices are small in test piece size, low in test piece pressure and low in test piece temperature are overcome and the feasibility test study is carried out on the coal seams with the depth of thousands of meters underground.

Description

technical field [0001] The invention discloses a test method for geological storage of carbon dioxide in coal seams, belonging to the technical field of greenhouse effect gas geological storage. It is mainly used for the experimental research on the geological storage of the main greenhouse gas carbon dioxide in different deep coal seams and the displacement effect of coal seam gas. Background technique [0002] As the global climate warms, the disposal of carbon dioxide, a major greenhouse gas, has gradually become a hot spot for relevant scientists around the world. There are many ways to geologically dispose of carbon dioxide, including storage in abandoned oil and gas reservoirs, storage in deep saline water layers, storage in deep unminable coal seams, and storage in salt rock caverns. Due to the different characteristics of the adsorption of carbon dioxide and gas in coal seams, geological storage in coal seams can not only store carbon dioxide geologically, but also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
Inventor 梁卫国张倍宁杨栋徐素国赵阳升
Owner TAIYUAN UNIV OF TECH
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