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High temperature seepage test device and method

An experimental device and seepage technology, which is used in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc., can solve problems such as inability to correctly reflect the formation permeability of coal and rock samples, and achieve simple structure and simple method. , the effect of chemical stability

Inactive Publication Date: 2012-05-02
CHINA UNIV OF MINING & TECH
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AI Technical Summary

Problems solved by technology

Because the coal rock sample is too small, it is impossible for a coal rock sample to contain a complete bedding structure, so it cannot correctly reflect the specific permeability of the coal rock sample formation

Method used

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  • High temperature seepage test device and method
  • High temperature seepage test device and method
  • High temperature seepage test device and method

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Experimental program
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Embodiment Construction

[0021] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

[0022] As shown in the accompanying drawings, the high-temperature seepage test device of the present invention mainly consists of a nitrogen cylinder 1, a pressure chamber 15, a pressure chamber cover plate 7 with a central hole, an upper and lower guiding pressure head, a main engine shaft pressure head 12, a collection bottle 13, The gas flow meter 14 is composed of the pressure chamber 15 using the double-layer shrink sleeve structure of the inner and outer H13 steel thick-walled cylinder cylinders. In the cavity of the pressure chamber 15, the surrounding pressure sleeve, the axial pressure head 11, and the guide air pressure are placed sequentially from bottom to top. Head 8, coal rock sample 9, upper and lower guide pressure heads, and coal rock sample 9 is wrapped tightly with red copper skin 17, mica paper 18, alloy resistance sheet 19, mica pape...

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Abstract

The invention discloses a high temperature seepage test device and method. The device is mainly composed of a nitrogen gas bottle, a pressure chamber, a pressure chamber cover plate, upper and lower gas guide pressing heads, a main engine shaft pressing head, a collecting bottle and a gas flow meter. The method comprises the following steps of: filling nitrogen gas to a coal rock sample in the pressure chamber, enabling the nitrogen gas to flow out by a flow guide channel after permeating through the coal rock sample under a certain pressure and temperature, making the nitrogen gas pass through a gas outlet of the main engine shaft and enter in the collecting bottle by a communicating pipe, discharging the nitrogen gas in the collecting bottle by a gas discharging pipe on a top cover of the collecting bottle, and recording flow quantity of the discharged gas at this time by the gas flow meter; closing a pressure control valve by regularly increasing the pressure of the nitrogen gas for multiple times until the pressure of the filled nitrogen gas is increased to 4MPa, meanwhile, stopping work by regularly rising the temperature of the coal rock sample for multiple times until the temperature is rose to 600 degrees centigrade; and analyzing the acquired data to finish the overall test. The test device is simple in structure, the test method is simple and convenient and good simulation effect is realized.

Description

technical field [0001] The invention relates to a seepage experimental device and method, in particular to a high-temperature seepage experimental device and method suitable for measuring the permeability of large coal rock samples. Background technique [0002] Permeability is an important parameter for the evaluation and exploitation of fluid mineral deposits (oil, natural gas, coalbed methane, groundwater, etc.), and has always been a problem that geologists, development engineers, and logging analysts have focused on solving. The influencing factors are complex, such as mineral composition, rock structure, shale content, pore shape, porosity, etc. In addition, temperature is also one of the main factors affecting its size. In order to determine the permeability, people have carried out long and unremitting efforts. At present, there are several ways to obtain reservoir permeability, such as core laboratory measurement permeability, seismic interpretation permeabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 万志军赵阳升刘渝张源周长冰国峰
Owner CHINA UNIV OF MINING & TECH
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