Method for measuring liquid flow in saturated porous medium

A technology for porous media and liquid flow, which is used in the analysis of suspensions and porous materials, measurement devices, scientific instruments, etc. It can solve the problems of expensive technology, difficult to popularize and apply, and difficult to apply discrete particle media, and achieve the effect of reducing research costs.

Inactive Publication Date: 2018-06-01
DALIAN UNIV OF TECH
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Problems solved by technology

The flow of pore liquid in porous media such as rock mass can be measured by nuclear magnetic resonance imaging, but because this technology i

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  • Method for measuring liquid flow in saturated porous medium

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Embodiment Construction

[0017] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0018] A method for measuring pore fluid flow in a saturated porous medium, characterized in that the saturated porous medium is composed of a transparent granular medium and a pore liquid with matching refractive index, a percolation model box 4 made of transparent organic glass, a laser 3 and a lens 7 placed on the side , composed of a pore liquid holding container 5 dispersed with nano fluorescent particles, a digital camera 1 and a computer 2 interpolated with an image acquisition card. The pore liquid with fluorescent particles flows downward continuously in the porous transparent medium. The laser generates fan laser through the lens, and enters the saturated transparent porous medium, and interacts with the fluorescent particles in the flowing pore liquid to produce laser speckle effect. . A digital camera captures plane images of laser speckle i...

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Abstract

The invention provides a method for measuring a liquid flow in a saturated porous medium. The method belongs to the technical field of experimental mechanics testing, and comprises the steps of continuously downwards flowing fluorescence pore fluid in a porous transparent medium, producing a sector laser light by a laser through the transparent medium, entering a saturated transparent porous medium, and acting with fluorescent particles in the flowed pore fluid to produce a laser speckle effect; shooting laser speckle plane images in the transparent saturated porous medium at different times through a digital camera, carrying out correlation analysis, acquiring movement displacement, a speed value and a vector of the fluorescent particles, and obtaining the flowing speed magnitude and a vector diagram of the pore fluid; finally combining with a calibration parameter of the digital camera to obtain actual displacement and speed value, and obtaining flowing speed magnitude distribution and direction of the fluid in the saturated transparent porous medium. The method provided by the invention is used for researching a speed field change rule of seepage in the saturated porous medium in a natural world, and has significance on researching oil gas flowing and mining.

Description

technical field [0001] The invention belongs to the technical field of experimental mechanics testing, and relates to a method for measuring liquid flow in saturated porous media, in particular to the use of transparent particle media and pore liquid with matching refractive index to form saturated porous media and digital image correlation technology to measure saturated porous media A method of pore fluid flow in a medium. Background technique [0002] Porous media such as rocks, sand, soil, grains, and industrially produced granular products are ubiquitous in nature and industry. The flow of pore liquid in saturated porous media is a problem that researchers pay more attention to. This basic problem is very important for understanding the mechanism of liquid flow in porous media, and it can be applied to the flow, drainage and infiltration of oil and gas in porous media such as rock and soil. And other important engineering problems are very important. The flow of pore ...

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Application Information

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IPC IPC(8): G01N15/08
Inventor 赵红华刘聪邱鹏季顺迎
Owner DALIAN UNIV OF TECH
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