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Rock pore volume compression coefficient measuring device and measuring system

A technology of pore volume and compressibility, which is applied in measuring devices, using stable tension/pressure to test material strength, permeability/surface area analysis, etc., can solve the problems of large measurement errors, eliminate errors, and improve measurement accuracy. Effect

Pending Publication Date: 2022-02-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a rock pore volume compressibility measuring device and a measuring system to solve the problem of large measuring errors of measuring devices in the prior art

Method used

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  • Rock pore volume compression coefficient measuring device and measuring system
  • Rock pore volume compression coefficient measuring device and measuring system
  • Rock pore volume compression coefficient measuring device and measuring system

Examples

Experimental program
Comparison scheme
Effect test

experiment Embodiment 1

[0052] Use the rock pore volume compressibility measuring device provided in this embodiment to calibrate the dead volume of the device circuit, and the first plug and the second plug are in direct contact. Its operation method includes the following steps:

[0053] S1. Connect the instrument according to the measurement system diagram, and directly contact the first plug and the second plug.

[0054] S2. Close the valves connecting the vacuum pump and the injection pump to the measuring device.

[0055] S3. Connect the helium porosimeter to the outlet of the measuring chamber, and open the valve at the outlet.

[0056] S4. Use a helium porosimeter to measure the dead volume of the device loop, and measure five times to get the average value.

experiment Embodiment 2

[0058] The rock pore volume compressibility measuring device provided in this example is used to measure the pore volume compressibility of the solid metal block. The solid metal block has no pores, and its pore volume compressibility is 0. The pore volume does not change during the experiment. Its operation method includes the following steps:

[0059] S1. Put the solid metal block into the improved device, and increase the initial confining pressure to 1.38MPa.

[0060] S2. Vacuumize the pore pressure pipeline and internal pressure system of the device, and saturate the pore pressure pipeline and internal pressure system of the device with brine.

[0061]S3. Use the injection pump to add a pore pressure of 1.38MPa to the pore pressure pipeline of the device, and use two confining pressure pumps to load the first confining pressure of 2.76MPa.

[0062] S4. Keep the pore pressure constant, and increase the confining pressure point by point with a step size of 5 MPa. After th...

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Abstract

The invention provides a rock pore volume compression coefficient measuring device and measuring system, and the rock pore volume compression coefficient measuring device comprises: a shell which is provided with a measuring cavity used for accommodating a measured rock; a plug assembly which comprises a first plug and a second plug which are coaxially arranged, wherein the first plug and the second plug can be axially and movably arranged in the measuring cavity, when the plug assembly is in a measuring state, the measured rock is clamped between the first end of the first plug and the first end of the second plug, and when the plug assembly is in a calibration state, the first end of the first plug is in contact with the first end of the second plug; and a pressurizing saturation judging assembly, wherein the measuring cavity is provided with an inlet end and an outlet end, the pressurizing saturation judging assembly is arranged at the outlet end of the measuring cavity, and the pressurizing saturation judging assembly is communicated with the measuring cavity so as to judge the pressurizing saturation balance state of the measuring cavity. Through the technical scheme provided by the invention, the problem of large measuring error of a measuring device in the prior art can be solved.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas devices, in particular to a rock pore volume compressibility measuring device and a measuring system. Background technique [0002] The compressibility coefficient of rock pore volume is an important parameter in reservoir engineering research, and it has important application value in material balance analysis, well test interpretation, numerical simulation calculation, evaluation of reservoir elastic productivity and dynamic geological reserves. Accurately measuring the compressibility of rock pore volume under different effective pressures to obtain the change law of compressibility with formation pore fluid pressure is of great significance for understanding reservoirs and adjusting oil and gas reservoir development plans. [0003] The oil and gas industry standard SY / T 5815-2016 specifies the method for measuring the compressibility coefficient of rock pore volume, and speci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12G01N3/02G01N15/08
CPCG01N3/12G01N3/02G01N15/088G01N15/0806G01N2203/0044G01N2203/0085G01N2203/0641G01N2203/0676G01N2203/0682
Inventor 寇根韩学辉刘赛周伟周波郭慧英魏云娄清香周浩许宁郭立辉江佳洋
Owner PETROCHINA CO LTD