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A test device for geological storage of carbon dioxide coal seam

A carbon dioxide, test device technology, applied in the fields of fluid extraction, measurement, sustainable manufacturing/processing, etc., can solve problems such as the failure to reflect the structural characteristics of coal seams rich in cleavage fissures, the in-situ stress and geothermal conditions of deep coal seams, etc.

Inactive Publication Date: 2015-08-19
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A test device for geological storage of carbon dioxide coal seam

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0023] 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

[0033] 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

[0034] 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.

[0035] To sum up, the present invention is mainly used for the experimental research on the carbon dioxide geological storage and coal seam gas displacement effect of the important greenhouse gas carbon dioxide in different deep coal seams.

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Abstract

A testing device for geological storage of carbon dioxide in coal seams belongs to the technical field of geological storage of greenhouse gases, and is characterized in that the device is a geological environmental condition simulation device capable of packing a large-size test piece in high pressure, wherein the size of the test piece is 200 * 200 * 400 mm, the axial pressure and the confining pressure of the test piece can reach 120 MPa respectively, and the environmental temperature of the test piece can reach 200 DEG C; and the device can simulate coal seams of which buried depth can reach 4,800 m. The testing plant comprises four systems, namely a geological environmental simulation system, a fluid injection system, a fluid producing system and a testing control system. According to the invention, the newly developed testing device for geological storage of carbon dioxide in the coal seams is adopted to simulate the geological conditions of large buried depth coal seams, the defects and shortcomings of small size, low pressure and low temperature in a test piece of a conventional testing device are overcome, and workable testing and study for underground coal seams with the depth of thousands of meters can be realized.

Description

technical field [0001] The invention discloses a test device for geological storage of carbon dioxide coal seams, belonging to the technical field of greenhouse effect gas geological storage. It is mainly used for experimental research on the geological storage of carbon dioxide and the displacement effect of coal seam gas in different deep coal seams of important greenhouse gas carbon dioxide. 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 geologicall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00E21B49/00E21B43/16
CPCY02P90/70
Inventor 梁卫国张倍宁杨栋徐素国赵阳升
Owner TAIYUAN UNIV OF TECH
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