The device is suitable for rock gas breakthrough pressure measurement under high-temperature and high-pressure conditions
A high-temperature, high-pressure, measuring device technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problem of not being able to measure the breakthrough pressure of rock gas
Active Publication Date: 2021-03-26
PETROCHINA CO LTD
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[0006] In order to solve the problem that existing devices cannot measure rock gas breakthrough pressure under high temperature and high pressure conditions, the present invention provides a rock gas breakthrough pressure measuring device suitable for high temperature and high pressure conditions, the rock gas breakthrough pressure measuring device suitable for high temperature and high pressure conditions A booster device is installed at the outlet end of the core holder to increase the outlet pressure, increase the boiling point of the fluid, and ensure that the fluid does not evaporate to generate bubbles, so that the rock gas breakthrough pressure can be accurately and reliably measured under high temperature and high pressure conditions.
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[0031] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0032] A rock gas breakthrough pressure measurement device suitable for high temperature and high pressure conditions, including:
[0033] a simulation unit containing a core holder 16;
[0034] The injection unit is connected to the inlet end of the core holder 16 and can inject gas into the core holder 16;
[0035] The detection unit includes a bubble monitor 5, and the inlet end of the bubble monitor 5 can communicate with the outlet end of the core holder 16;
[0036] A back pressure unit, capable of increasing the pressure in the air bubble monitor 5;
[0037] Between the inlet end of the bubble monitor 5 and the outlet end of the core holder 16, a vacuum branch line 29 and a pressure s...
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The invention provides a rock gas breakthrough pressure measuring device suitable for high-temperature and high-pressure conditions, which is mainly characterized in that a high-temperature and high-pressure resistant bubble monitor consisting of a sapphire window is additionally arranged at the rear end of a rock core holder, so that the problem that an infrared bubble detector is not resistant to temperature and pressure is solved. A back pressure system is additionally arranged behind the bubble detector, so that the boiling point of the liquid in the bubble detection device can be improved, and the liquid is prevented from boiling and evaporating. The rock core rear pipeline is connected with a vacuum pump and is used for removing residual bubbles in the pipeline at the outlet end of the rock core holder due to the sample dismounting and mounting process. The outlet end of the rock core holder is connected with a pressure supplementing system to ensure that the rear-end pipeline pressure of the rock core is consistent with the pressure of the back-pressure valve; and meanwhile, all links of the experiment can be controlled in an omnibearing mode, real-time tracking and automatic recognition are achieved, and the experiment efficiency is improved. The high-temperature and high-pressure simulation experiment can simulate geological conditions, wherein the measured data is ofgreat significance to cover layer evaluation under the geological conditions.
Description
technical field [0001] The invention relates to the field of natural gas geological experiments, in particular to a rock gas breakthrough pressure measuring device suitable for high temperature and high pressure conditions. Background technique [0002] The breakthrough pressure is the minimum pressure required for the non-wetting phase fluid to form a continuous mobile phase by the capillary force of the wetting phase fluid in the porous medium. The breakthrough pressure can calculate the height of the gas column that the caprock can seal the natural gas, and it is an evaluation method for studying the storage conditions of oil and gas. One of the most direct and important technical parameters of the caprock. [0003] For a certain rock, its breakthrough pressure is not a fixed value, but changes continuously with the external physical conditions (mainly temperature and pressure conditions). The experimental data provided in the laboratory are often measured under normal t...
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Login to View More IPC IPC(8): G01N3/12G01N3/06
CPCG01N3/12G01N3/068G01N2203/0019G01N2203/0044G01N2203/0641
Inventor 国建英谢增业张璐李剑付立新杨威魏国齐王东良董才源江海洋杨春龙
Owner PETROCHINA CO LTD