Simulation Test Device for Dynamic Change of Coal Reservoir Fracture Gas and Water Conductivity
A conductivity, dynamic change technology, used in production fluids, wellbore/well components, earthmoving, etc.
Inactive Publication Date: 2015-11-04
HENAN POLYTECHNIC UNIV
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Problems solved by technology
But at present, there is no relatively mature device that can dynamically monitor the change of fracture conductivity in the process of drainage under different conditions.
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[0028] Such as Figure 1 to Figure 9 As shown, the coal reservoir fissure gas and water conductivity dynamic change simulation test device of the present invention includes a coal reservoir water and gas supply system, a coal reservoir fissure simulation system, a water and gas separation measurement system and a data monitoring and acquisition system ; The outlet of the coal reservoir water and gas supply system is connected to the inlet of the coal reservoir fracture simulation system, and the outlet of the coal reservoir fracture simulation system is connected to the water and gas separation measurement system; the coal reservoir water and gas supply system, the coal reservoir Layer crack simulation system, water and gas separation measurement system and data monitoring and acquisition system through data line 24 ( figure 1 dotted line in ) connection.
[0029]The coal reservoir water and gas supply system includes a methane high-pressure gas cylinder 1, a water tank 2, a ...
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A coal reservoir fracture gas and water conductivity dynamic change simulation testing device comprises a coal reservoir gas and water supply system, a coal reservoir fracture simulation system, a water and gas separation measurement system and a data monitoring collection system. An outlet of the coal reservoir gas and water supply system is connected with an inlet of the coal reservoir fracture simulation system, and an outlet of the coal reservoir fracture simulation system is connected with the water and gas separation measurement system. The coal reservoir fracture gas and water conductivity dynamic change simulation testing device can simulate the stressed state of coal reservoirs, can accurately test changing of the coal reservoir fracture conductivity under different confining pressures, at different drainage stages, with different fracture lengths and different fracture widths and in fracture combinations, and provides theoretical basis for the coal-bed gas well drainage working system; and simulates the drainage process of coal-bed gas wells, can distinguish paths of water and gases in coal beds under conditions of different fracture combinations, different pressures and the like in the coal-bed gas well drainage process, and provides theoretical support for researching the coal-bed gas well aerogenesis mechanism.
Description
technical field [0001] The invention belongs to the technical field of coal bed gas safety production, and in particular relates to a simulation test device for dynamic change of coal reservoir fissure gas and water diversion capacity. Background technique [0002] Coalbed methane is mainly present in coal reservoirs in the state of adsorption. At present, surface coalbed methane is mainly produced by desorption of coalbed methane by pumping water from coal reservoirs to reduce the pressure of coal reservoirs. The size and length of fractures in coal reservoirs, the combination of fractures with different lengths and widths, the flow distance of water in coal seams, and the choice of flow path will all affect the amount of water produced during the drainage of coalbed methane wells. The amount of produced water will to a certain extent affect the pressure drop in the gas production range of the coalbed methane well, and ultimately affect the gas production of the coalbed met...
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IPC IPC(8): E21B43/00
Inventor 倪小明王延斌李全中刘晓宋金星
Owner HENAN POLYTECHNIC UNIV