Measuring device and method for liquid permeability of compressed rock in reservoir conditions

A liquid permeability and tight rock technology, which is applied in development experiments and oil and gas field exploration, can solve problems such as difficult to judge the steady state, long stable time in tight rock permeability testing, and difficult micro-flow measurement, so as to achieve reliable and good test results. The effect of applying the foreground

Inactive Publication Date: 2016-12-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, through the above analysis, it can be seen that although the principle of the steady-state permeability test is simple, the experimental process is easy to set up, and it is a calibration method

Method used

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  • Measuring device and method for liquid permeability of compressed rock in reservoir conditions

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Example Embodiment

[0020] Example 1

[0021] like figure 1 As shown, a device for measuring liquid permeability of tight rocks under reservoir conditions according to a specific embodiment of the present invention includes a constant temperature box 5, a first piston container 17, a second piston container 18, a core holder 6, a surrounding Pressure pump 3, vacuum pump 1, injection pump 2 and back pressure pump 4. Wherein the first piston container 17 and the second piston container 18 are in the incubator 5, and the first piston container 17 and the second piston container 18 are used to contain test fluid. The rock core holder 6 is also arranged in the thermostat 5, and the inside of the rock core holder 6 is used to clamp the rock core sample. Liquid end connection. The temperature of the constant temperature box 5 of the present embodiment can be set, and during specific measurement, it is ensured that the rock core sample in the rock core holder 6 and the test fluid in the first piston c...

Example Embodiment

[0032] Example 2

[0033] A method for measuring the fluid permeability of tight rocks under a reservoir condition according to a specific embodiment of the present invention, comprising the following steps (combined with figure 1 Be explained):

[0034] (1) select the rock core sample for experiment and pack the rock core sample into the rock core holder 6;

[0035] (2) Utilize the confining pressure pump 3 to add the confining pressure to the initial value for the rock core sample;

[0036] (3) Utilize the vacuum pump 1 to vacuumize both sides of the rock core sample;

[0037] (4) Utilize the flow pump to apply the same pressure on both sides of the core sample, and set the confining pressure pump 3 to the tracking mode at the same time, so that the loaded confining pressure is always 3MPa greater than the fluid pressure. perform fluid saturation;

[0038] (5) Increase the pressure applied to both sides of the core sample to the reservoir pressure, repeat the fluid satur...

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Abstract

The invention discloses a measuring device and a method for liquid permeability of a compressed rock in reservoir conditions, wherein the device comprises a thermostat; a first piston container and a second piston container which are arranged in the thermostat and used for containing test fluid; a core holder which is arranged in the thermostat, wherein the interior thereof is used for clamping a core sample, the two ends of the core holder is respectively connected to the outlet ends of the first piston container and the second piston container; a confining pressure pump used for adding confining pressure to the core sample in the core holder; a vacuum pump used for drawing a vacuum on the two sides of the core sample in the core holder; an injection pump which can inject the test fluid in the first piston container into one side of the core sample in the core holder; and a backpressure pump which can inject the test fluid in the second piston container into the other side of the core sample in the core holder. The test results of the device are more reliable.

Description

technical field [0001] The invention relates to the field of oil and gas field exploration and development experiments, in particular to a device and method for measuring liquid permeability of tight rocks under reservoir conditions. Background technique [0002] Indoor testing methods of tight rock permeability can be divided into steady-state method and unsteady-state method. Among them, the steady-state method adopts Darcy's law of seepage. When the flow state reaches a stable state, the pressure difference and flow rate at both ends of the core are measured and combined with other parameters to calculate the permeability. The principle of the method is simple, the experimental procedure is easy to set up, gas or liquid can be used as the flow medium, and it is a calibration method for other permeability testing methods. The steady-state method has been applied for more than 50 years, and has played an important role in the permeability test of medium-high permeability c...

Claims

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Application Information

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IPC IPC(8): G01N15/08
Inventor 伦增珉赵春鹏周志成乔国安吕成远赵清民潘伟义王海涛陈少华郎东江
Owner CHINA PETROLEUM & CHEM CORP
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