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Apparatus and method for measuring apparent permeability of tight rock core

A testing device and permeability technology, which is applied in the direction of measuring device, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problem of inability to measure the permeability of tight rock cores, and achieve continuous real-time measurement and continuous measurement , Realize the effect of curve measurement

Active Publication Date: 2017-09-15
CHINA UNIV OF PETROLEUM (BEIJING) +1
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Problems solved by technology

[0005] This application provides a compact rock core apparent permeability testing device and testing method, which are used to solve the problem that the prior art cannot measure the tight rock core permeability under a small pressure difference under high pressure

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  • Apparatus and method for measuring apparent permeability of tight rock core
  • Apparatus and method for measuring apparent permeability of tight rock core
  • Apparatus and method for measuring apparent permeability of tight rock core

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0033] Such as figure 1 as shown, figure 1 It is a structural diagram of the tight core apparent permeability testing device of the embodiment of the present application. In addition to being applicable to tight rock cores, this embodiment is also applicable to the measurement of other types of rock cores. The device for testing the apparent permeability of the tight rock core can realize the continuous real-time measurement of the unsteady micro-flow rate under high pressure, and then ca...

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Abstract

The invention provides an apparatus and a method for measuring the apparent permeability of a tight rock core. The apparatus comprises a rock core holder, a first high pressure injection pump, a second high pressure injection pump, a micro-differential pressure meter, a first pressure-resistant piston container, a micro-flow meter, a first valve, a second valve, a third valve, a fourth valve and a fifth valve, wherein the micro-flow meter comprises a first pressure-resistant container, a second pressure-resistant container, a high pressure micro-flow pump, a pressure-resistant capillary tube, a resistance measuring device and a sixth valve. After the pressure-resistant capillary tube is filled with a measured fluid, the third valve and the fifth valve are closed, the fourth valve and the sixth valve are opened, and the high pressure micro-flow pump is started to make the measured fluid return to the head end of the pressure-resistant capillary tube; and when the resistance measured by the resistance measuring device is an initial resistance, the fourth valve, the sixth valve and the high pressure micro-flow pump are closed, and the third valve and the fifth valve are opened. The apparatus and the method can realize continuous real-time measurement of unstable micro-flow under a high pressure in order to realize the continuous measurement of the apparent permeability of the tight rock core.

Description

technical field [0001] The application belongs to the field of rock core experiment analysis, and relates to a tight rock core apparent permeability testing device and a testing method based on the device. Background technique [0002] The abnormal seepage of fluid in tight core makes the traditional permeability test principle and method not suitable for tight core permeability test. Therefore, there is an urgent demand for principles and instruments suitable for tight core permeability testing, which has become a bottleneck problem restricting the research on the theory and technology of tight sandstone / shale / coal rock and other tight reservoir mining. [0003] At present, the methods for testing core permeability mainly include steady-state method, transient pressure pulse attenuation method, pore pressure oscillation method and unconventional steady-state method, etc. The basic principles are Darcy's formula of linear seepage, in which the permeability value is a consta...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 岳湘安安维青冯雪钢张立娟邹积瑞方欣傅友军方伟张俊彬田文浩赵决顺孔彬赵胜绪
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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