A device for testing CO2 diffusion concentration and diffusion coefficient in porous media and its testing method

A technology of porous media and diffusion coefficient, which is applied in the direction of measuring devices, instruments, surface/boundary effects, etc., and can solve problems affecting results, porous media errors, etc.

Active Publication Date: 2019-06-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
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Problems solved by technology

However, this method fails to directly obtain CO 2 Concentration distribution, the calculation of parameters involving the state equation and compressibility factor in the mathematical model may have a large error with the real state in the porous medium, thus affecting the final result

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  • A device for testing CO2 diffusion concentration and diffusion coefficient in porous media and its testing method
  • A device for testing CO2 diffusion concentration and diffusion coefficient in porous media and its testing method
  • A device for testing CO2 diffusion concentration and diffusion coefficient in porous media and its testing method

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Embodiment Construction

[0008] Technical scheme of the present invention is as follows:

[0009] A method for testing CO in porous media 2 Concentration and diffusion coefficient devices, including a constant temperature control box, a core holding sampler set in the constant temperature control box, a confining pressure control device and CO 2 A high-pressure storage tank; a computer is arranged outside the thermostatic control box: for monitoring CO 2 The pressure and the temperature in the constant temperature control box; CO is also provided outside the constant temperature control box 2 gas source with the CO 2 The high-pressure storage tanks are connected; a sampling port and a sampler are also provided on the core holding sampler.

[0010] Preferably according to the present invention, the CO 2 Gas source through CO 2 cooling cycle booster pump with the CO 2 High pressure storage tank connected.

[0011] In the thermostatic control box 1, a core holding sampler 3, a pressure sensor 8, a...

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Abstract

The invention provides a device for testing diffusion concentration and diffusion coefficient of CO2 in a porous medium. The device can directly measure concentration of CO2 in a porous medium at some point-in-time and at some spatial point, and further through a limited one-dimensional axial diffusion model, CO2 diffusion coefficient is obtained. By the device, diffusion concentration of CO2 in the porous medium can be obtained directly, and the diffusion coefficient of CO2 in the porous medium is directly calculated through a method which matches the device. Thus, the tedious process of correcting diffusion coefficient through a complex mathematical model by a traditional method is avoided. Meanwhile, high-temperature high-pressure experimental conditions also can be satisfied, the device is compatible with the live environment such that actual diffusion condition of CO2 in the porous medium is researched and numerical calculation and prediction of CO2 diffusion concentration are corrected and guided.

Description

technical field [0001] The invention relates to a method for testing CO in porous media 2 A device for diffusion concentration and diffusion coefficient and a testing method thereof belong to the technical field of oil and gas field development engineering. Background technique [0002] CO 2 As one of the main greenhouse gases, carbon capture and storage technology has received extensive attention in recent years. The study found that CO 2 The potential of geological storage is huge, which can effectively alleviate the growth of greenhouse gases, and CO 2 It has a unique physical and chemical interaction with formation fluid, and is an ideal injection fluid in the process of oil and gas field development. According to the 2012 "Global EOR Survey" of "Oil and Gas Journal", among the global EOR projects, the number of gas drive projects accounted for 54%, while CO 2 The number of related projects accounts for 77% of gas drive projects, and it has become one of the most im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/00G01N30/02
CPCG01N13/00G01N30/02
Inventor 李松岩乔辰宇李兆敏冀国伟李宾飞张超
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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