Multifunctional rock core holder for rock core scale nuclear magnetic resonance test

Abstract

The invention discloses a multifunctional rock core holder for a rock core scale nuclear magnetic resonance test. According to the multifunctional rock core holder, an end cover of the holder is connected with a fixing plug by a bolt; a circulating hydraulic oil outlet is an opening in the fixing plug; the fixing plug is connected with a barrel body; the barrel body is connected with an oil cylinder; a downstream oil injection hole of the oil cylinder, an upstream oil injection hole of the oil cylinder and a circulating hydraulic oil inlet are openings in the oil cylinder; the oil cylinder is connected with an end cover of the oil cylinder and is sealed by a sealing ring; a test sample upstream water injection hole is an opening in a test sample upstream cushion block; the test sample upstream cushion block is directly inserted into a piston; a test sample downstream water injection hole is an opening in a test sample downstream cushion block; the test sample downstream cushion block is directly inserted into the end cover of the holder; a rock core test sample is placed between the test sample upstream cushion block and the test sample downstream cushion block; a displacement sensor support is connected with the piston; the displacement sensor support is connected with a pressure rod type displacement sensor. The multifunctional rock core holder is simple in structure and convenient to use, and can be used for carrying out porous medium percolation-mechanics researches of different temperatures, different stress conditions, different pore pressure and different rock core sizes.

Description

technical field [0001] The invention relates to a holder in a rock mechanics test device, and more particularly relates to a multifunctional core holder for core-scale nuclear magnetic resonance tests, which is suitable for rock cores of different shapes and sizes, thereby realizing nuclear magnetic resonance core tests. Background technique [0002] NMR is a rapid, non-destructive, non-toxic and non-polluting detection technique that does not require tracer reagents, so it is widely used in indoor core tests. In the indoor nuclear magnetic resonance core test, the nuclear magnetic resonance phenomenon of hydrogen atoms is usually used to analyze the properties of the core such as porosity, saturation, and permeability. The deformation and failure process of the sample can be used to study the hydraulic and mechanical properties of the porous medium, that is, the core sample. Therefore, it is suitable for oil, natural gas exploitation and CO 2 Basic research in areas such a...

AI Technical Summary

Problems solved by technology

[0003] At present, the holders for nuclear magnetic resonance core tests are mainly used in seepage tests, that is, two-phase displacement tests and flow tests. Some holders can apply confining pressure and heating temperature control, and are only suitable for a single core size. Few grippers can apply axial compression

No nuclear magnetic resonance core test holder has been found that can apply confining pressure, heating temperature control, axial pressure, and measure sample deformation

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