A simulation test measuring instrument for natural gas diffusion coefficient
A technique for simulating experiments and diffusion coefficients, applied in diffusion analysis, instruments, measuring devices, etc., can solve problems such as low experimental pressure and failure to simulate real formation conditions, and achieve the effect of improving accuracy and reliability
Active Publication Date: 2022-06-28
TAIYUAN UNIV OF TECH
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a natural gas diffusion coefficient simulation test measuring instrument, which can solve the problem that although the commonly used laboratories can measure the natural gas diffusion coefficient, the experimental pressure is low and the real formation conditions cannot be simulated.
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[0017] The following embodiments can make those skilled in the art understand the present invention more comprehensively, but do not limit the present invention to the scope of the described embodiments.
[0018] like figure 1 figure 2 A natural gas diffusion coefficient simulation test instrument shown in the figure includes a vacuum power unit 1, a gas preparation and injection module 2, an experimental medium and a test unit 3, a temperature and pressure environment simulation unit, a data acquisition and analysis system 6 and a differential automatic balance. System 7; the temperature and pressure environment simulation unit includes a constant temperature oil bath unit 4 and a ring pressure tracking pump 5;
[0019] The vacuum power unit 1 is connected to the input end of the experimental medium and the test unit 3 through a pipeline, and the pipeline is provided with a vacuum control valve 11; the gas preparation and injection module 2 includes a constant speed and con...
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The invention relates to a natural gas diffusion coefficient simulation test measuring instrument, which is characterized in that it includes a vacuum power unit, a gas preparation and injection module, an experimental medium and a test unit, an experimental medium and a test unit, a data acquisition and analysis system, and a differential automatic balance System; in the present invention, the temperature of the system is controlled by the constant temperature oil bath unit, the confining pressure is controlled by the ring pressure tracking pump, and the pressure in the experimental medium and the test unit is controlled by the constant speed and constant pressure pump, thereby simulating the real temperature and pressure conditions of the formation; the present invention has The timely tracking system of the volume of the experimental medium and the test unit can dynamically record the volume of the experimental medium and the test unit caused by the experimental sampling and / or the poor air tightness of the test medium and the test unit under the condition that the pressure is constant and there is no pressure difference. Volume change; by simulating the actual formation conditions and strictly monitoring the parameters in the experimental process, the accuracy and credibility of the experimental results are greatly improved.
Description
technical field [0001] The invention relates to the field of natural gas simulation test, in particular to a natural gas diffusion coefficient simulation test measuring instrument. Background technique [0002] The diffusion coefficient of natural gas is an important parameter in the process of gas reservoir engineering. In the study of seepage theory, the diffusion coefficient of gas is also involved in the description of the diffusion term in the well test model; the current diffusion coefficient measurement experiments on the market The following problems cause deviations in the measured data; on the one hand, when replacing the core, it is necessary to place the core column at the entrance of the holder and then use the column to push the core to the middle of the holder. During operation, if Improper handling can easily cause the core to get stuck in the holder. Especially when measuring brittle cores such as shale, the samples will be directly crushed in severe cases....
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IPC IPC(8): G01N13/00
CPCG01N13/00G01N2013/003
Inventor 李龙龙李雨成张欢张智韬王宁李俊桥
Owner TAIYUAN UNIV OF TECH