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Method and device for measuring permeability of dense rock sample

A technology for tight rock and permeability, which is applied in the field of permeability measurement of tight rock samples, and can solve problems such as long time consumption and complicated data processing process

Pending Publication Date: 2018-12-25
PETROCHINA CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Using the method of measuring the permeability of tight rock samples in the above-mentioned related technologies, the subsequent data processing process is complicated and takes a long time

Method used

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  • Method and device for measuring permeability of dense rock sample
  • Method and device for measuring permeability of dense rock sample
  • Method and device for measuring permeability of dense rock sample

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Embodiment Construction

[0057] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0058] Please refer to figure 1 , which shows a schematic structural diagram of a device for measuring the permeability of tight rock samples provided by an embodiment of the present application. The device for measuring the permeability of tight rock samples may include: a gas source container 1, a first valve 2, a first pressure regulator Valve 3, upstream gas container 4, second valve 5, second pressure regulating valve 6, pressure gauge 7, third valve 8, core holder for placing dense rock samples 9, confining pressure pump 10, downstream gas container 11. A pressure sensor 12 and a fourth valve 13.

[0059] Such as figure 1 As shown, the outlet port of the gas source container 1 is connected to the inlet port of the first p...

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Abstract

The invention discloses a method and device for measuring the permeability of a dense rock sample and belongs to the technical field of oil-gas exploration and development. The method comprises the steps that the upstream pressure p<in> is obtained, and the upstream pressure p<in> refers to the pressure of the inlet end of a core holder; the corresponding relation between the downstream pressure p<t> and the time t is obtained, wherein the downstream pressure p<t> refers to the pressure of a downstream gas container at the moment of t; the real-time pseudo-pressure phi(t) is calculated according to the downstream pressure p<t>; the real-time permeability k(t) is calculated according to the real-time pseudo-pressure phi(t); and the average permeability k within the experiment time T is calculated according to the real-time permeability k(t). Due to the fact that only one measured variable exists, the data processing process is simple, and the used time is shorter.

Description

technical field [0001] The application relates to the technical field of oil and gas exploration and development, in particular to a method and device for measuring the permeability of tight rock samples. Background technique [0002] Permeability is one of the key parameters required for oil and gas reservoir evaluation, productivity calculation and formulation of a reasonable development plan. Obtaining accurate permeability parameters of underlying rock plays a vital role in guiding the formulation of oil and gas exploration and development plans. [0003] The methods for measuring the permeability of tight rock samples can be divided into steady-state methods and unsteady-state methods. Among them, the steady-state method is a commonly used method for measuring the permeability of tight rock samples in laboratories. The representative Darcy steady flow method uses traditional pressure gauges and flowmeters to measure the pressure at both ends of the rock sample and the ...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01N7/10
CPCG01N7/10G01N15/0826
Inventor 何家欢周克明李农杨雨肖富森段勇陈洪斌邹春艳
Owner PETROCHINA CO LTD
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