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Permeameter for measuring permeability of rock

A technique of permeability and permeameter, which is applied in the field of permeability measurement equipment, can solve the problems of poor reliability of sealing structure, large test results, loss of authenticity, etc., and achieve the effects of avoiding fluctuations, ensuring measurement results, and ensuring airtightness

Pending Publication Date: 2017-03-29
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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Problems solved by technology

[0005] An important factor affecting the accuracy of the permeability test is that the liquid flows out from between the outer walls of the rock pattern during the test, that is, the so-called "side leakage" phenomenon occurs. If this happens, the test results will be significantly larger and lose authenticity. Whether to send side leakage is determined by the rock clamping component, but the reliability of the sealing structure of the existing rock clamping component is poor, and side leakage is prone to occur when the outer periphery of the rock sample is not particularly flat

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  • Permeameter for measuring permeability of rock
  • Permeameter for measuring permeability of rock
  • Permeameter for measuring permeability of rock

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Embodiment Construction

[0054] Below in conjunction with each accompanying drawing, the present invention is described in detail.

[0055] Such as Figure 4 As shown, a permeameter for measuring rock permeability includes a penetration testing mechanism 2, and the penetration testing mechanism 2 includes a rock clamping assembly, such as figure 1 and 2 As shown, the rock clamping assembly consists of:

[0056] barrel-shaped body 25 with both ends open;

[0057] The hollow rock mounting part 22 is arranged in the body 25. The rock mounting part 22 includes an elastic sleeve 41 and a metal mounting sleeve 40 arranged at both ends of the elastic sleeve 41. The elastic sleeve 41 is used to install the rock 21 to be tested, and the metal mounting sleeve 40 passes through the The first sealing ring 38 is embedded on the inner wall of the body 25;

[0058] Two pressing cover plates are arranged on both sides of the body 25 respectively, the pressing cover plates are threadedly matched with the inner sid...

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Abstract

The invention discloses a permeameter for measuring permeability of rock. The permeameter comprises a rock clamping component which comprises a main body, a rock mounting piece and two pressing cover plates, wherein the rock mounting piece comprises an elastic sleeve and metal mounting sleeves, the elastic sleeve is used for mounting rock to be tested, and the metal mounting sleeve is embedded onto the main body; the two pressing cover plates are respectively in threaded connection with two sides of the main body, and fit with threads in the inner side wall of the main body, and the outer peripheral surface, stretching into the main body end, of each pressing cover plate is tightly pressed against the corresponding metal mounting sleeve. The elastic sleeve is elastic so as to be capable of well constraining the rock to be tested, so that tightness of the side wall of the rock is ensured, and liquid is prevented from flowing out from the side wall of the rock; the elastic sleeve and the rock can be mounted in the main body via the two metal mounting sleeves.

Description

technical field [0001] The invention relates to permeability measuring equipment, in particular to a permeameter for measuring rock permeability. Background technique [0002] In addition to the ability to store oil and gas, an oil and gas reservoir must also allow oil and gas to seep through rocks under pressure, which is a necessary condition for the development of oil and gas reservoirs. Rock permeability is the measure of the fluid's ability to percolate through the rock. [0003] In 1856, the French engineer Darcy used artificial sand bodies to study the percolation of water, thus establishing Darcy's law, in which the Darcy formula for liquid permeability is: [0004] In the formula, k is rock permeability, Q is liquid flow rate, μ is fluid viscosity, L is rock length, A is rock cross-sectional area, p 1 is the rock inlet pressure, p 2 is the rock outlet pressure. [0005] An important factor affecting the accuracy of the permeability test is that the liquid flow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 许友生徐建坤王长智林江凌玮
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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