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Diffusion coefficient measurement device of hydrocarbon gas

A hydrocarbon gas and diffusion coefficient technology, applied in the field of oil and gas exploration, can solve problems such as lack of reference value

Active Publication Date: 2017-01-25
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When using this diffusion coefficient to evaluate the diffusion of hydrocarbon gases, or when evaluating the gas reservoir protection ability of cap rocks, it lacks reference value.

Method used

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  • Diffusion coefficient measurement device of hydrocarbon gas

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with accompanying drawing.

[0022] figure 1 The overall structure of the hydrocarbon gas diffusion coefficient measurement device 100 (hereinafter referred to as the device 100 ) of the present invention is schematically shown.

[0023] The device 100 includes a rock holder 701 . A rock sample holding chamber for holding a rock sample 704 is provided in the rock holder 701 . The rock sample may be a generally cylindrical core. A first diffusion chamber 801 and a second diffusion chamber 802 are respectively arranged on both sides of the rock sample holding chamber. After the rock sample 704 is placed in the rock sample holding chamber, the first diffusion chamber 801 and the second diffusion chamber 802 are respectively set On either side of rock sample 704 and separated by rock sample 704 .

[0024] The device 100 also includes a first gas storage container 101 communicated with the first diffusi...

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Abstract

The invention relates to a diffusion coefficient measurement device of hydrocarbon gas, which comprises a rock holder for containing a rock sample, a first gas storage container, a second gas storage container and a differential pressure gauge, wherein a rock sample containing cavity is constructed in the rock holder; a first diffusion cavity is formed in one side of the rock sample containing cavity; a second diffusion cavity is formed in the other side of the rock sample containing cavity; the first gas storage container is communicated with the first diffusion cavity to inject the hydrocarbon gas into the first diffusion cavity; the second gas storage container is communicated with the second diffusion cavity to inject reference gas into the second diffusion cavity; the differential pressure gauge is communicated with the first diffusion cavity and the second diffusion cavity; the first gas storage container injects the hydrocarbon gas into the first diffusion cavity and the second gas storage container injects the reference gas to the second diffusion cavity simultaneously; and a reading of the differential pressure gauge is not greater than preset maximum differential pressure. With the adoption of the diffusion coefficient measurement device of the hydrocarbon gas, a relatively accurate diffusion coefficient can be obtained.

Description

technical field [0001] The invention relates to the field of oil and gas exploration, in particular to a hydrocarbon diffusion coefficient measuring device. Background technique [0002] Diffusion of hydrocarbon gas is the process of permeation and migration of hydrocarbon gas molecules in the substances in contact with it. Natural gas is a mixture of hydrocarbon and non-hydrocarbon gases that is deposited in formations. Diffusion is one of the ways of seepage and loss of natural gas. A large number of studies have shown that although the diffusion rate of natural gas in the ground is very small, the accumulated diffusion amount in the long geological history period is very considerable, which is enough to destroy valuable gas reservoirs. Therefore, the diffusion of natural gas or hydrocarbon gas through cap rocks cannot be ignored, and is an important research content in oil and gas exploration. The main factors causing the diffusion of hydrocarbon gases are concentratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/04
Inventor 杨俊高俊阳陈伟钧刘光祥孙长青宁丽荣卢丽
Owner CHINA PETROLEUM & CHEM CORP
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