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A device and method for simulating the impact of groundwater on coalbed methane

A technology for simulating device and coalbed methane, applied in measurement devices, instruments, scientific instruments, etc., can solve problems such as the inability to confirm the influence of coalbed methane storage, the inability to meet the simulation of large coal samples, and the complex structure of the simulation device.

Active Publication Date: 2018-01-23
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The structure of the above simulation device is relatively complex, which cannot satisfy the simulation of large coal samples, and the maximum control temperature is 100°C. In addition, it is impossible to confirm the influence of different solid-liquid ratios on the storage of coalbed methane

Method used

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  • A device and method for simulating the impact of groundwater on coalbed methane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] S1 Determine the influence of research pressure on coalbed methane, then set the coal-water mass ratio, water quality and coal quality as 20:1, total salinity 0.5g / L, lignite, and set the different values ​​of pressure as 1MPa, 5MPa, 10MPa, 15MPa.

[0039] S2 performs the following operations on each value of the pressure;

[0040] Separate the two half cylinders of the pressure tank, put the coal sample and water in a set ratio of 20:1, wherein the water quality needs to meet the condition of a total salinity of 0.5g / L, and close the pressure tank; and The induction coil of the induction heating coil is wound on the surface of the pressure tank;

[0041] Open the pressure reducing valve and the air inlet connection valve, release the gas to the pressure tank at a certain flow rate through the high-pressure gas bottle, check the pressure of the pressure tank through the pressure gauge until it reaches the set pressure value (1MPa, 5MPa, 10MPa, 15MPa); The induction co...

Embodiment 2

[0045] S1 is determined to study the influence of coal-water mass ratio on coalbed methane, and then set the pressure, water quality and coal quality as 1MPa, total salinity 0.5g / L, and lignite respectively, and set the different values ​​of coal-water mass ratio to 20 :1, 10:1, 5:1, 1:1, 1:10, 1:20;

[0046] S2 performs the following operations for each value of the coal-water mass ratio;

[0047] Separate the two half cylinders of the pressure tank, put the coal sample and water in the set ratio (20:1, 10:1, 5:1, 1:1, 1:10, 1:20), wherein The water quality needs to meet the condition of total salinity of 0.5g / L, close the pressure tank; and the induction coil of the induction heating coil is wound on the surface of the pressure tank;

[0048]Open the pressure reducing valve and the air inlet connection valve, release the gas to the pressure tank at a certain flow rate through the high-pressure gas bottle, check the pressure of the pressure tank through the pressure gauge un...

Embodiment 3

[0052] S1 determines the influence of water quality on coalbed methane, and then sets the pressure, coal-water mass ratio and coal quality as 1MPa, 20:1, and lignite respectively, and sets the different values ​​of water quality as total salinity of 0.5g / L, The total salinity is 2g / L, the total salinity is 8g / L, the total salinity is 25g / L, and the total salinity is 60g / L;

[0053] S2 performs the following operations on each value of the water quality;

[0054] Separate the two half cylinders of the pressure tank, put the coal sample and water in a set ratio of 20:1, wherein the water quality value of the water meets the set conditions (total salinity 0.5g / L, total mineralization 2g / L, total salinity 8g / L, total salinity 25g / L, total salinity 60g / L), close the pressure tank; and the induction coil of the induction heating coil is wound on the surface of the pressure tank;

[0055] Open the pressure reducing valve and the air inlet connection valve, release the gas to the pre...

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Abstract

The invention discloses a device and method for simulating influences of underground water on coalbed methane. The device comprises a sample bin and a high pressure gas bottle. The sample bin is mainly composed of a pressure tank. The whole pressure tank is in a cylindrical shape and formed by separably combining two semicylinders. The pressure tank is provided with a pressure meter and a gas-water separator. The pressure tank and the high pressure gas bottle are communicated. The device and method are simple, effective, applicable to large-size coal samples without breaking and capable of adapting to inspecting influences of different pressure, water qualities, coal qualities and coal-water ratios on coalbed methane storage.

Description

technical field [0001] The invention relates to an experimental device and method for coalbed gas, in particular to a simulation device and method for the influence of groundwater on coalbed gas. Background technique [0002] CBM is mainly stored in the double-porous medium of coal in the state of adsorption. In the study of coalbed methane storage and migration, research on the impact of groundwater on coalbed methane storage has always been the focus of coalbed methane storage research. [0003] The Chinese patent authorization number is CN100487755C, which discloses a coalbed methane accumulation simulation device, which is composed of a gas booster pump, a constant temperature cabinet, a control system and a computer processing system. [0004] The application publication number is CN1 01799466A, which discloses a physical simulation device and simulation method for coalbed methane production. The simulation device includes a sample chamber, a constant temperature water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
CPCG01N33/00
Inventor 熊集兵卞正富雷少刚杨德军王涛
Owner CHINA UNIV OF MINING & TECH
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