A multifunctional core holder for core-scale nuclear magnetic resonance test

Abstract

The invention discloses a multifunctional rock core holder for a core-scale nuclear magnetic resonance test. The end cover of the holder is connected with a fixed plug by bolts, the outlet of circulating hydraulic oil is an opening inside the fixed plug, and the fixed plug is connected with the cylinder body. The cylinder body is connected with the oil cylinder, the oil injection hole downstream of the oil cylinder, the oil injection hole upstream of the oil cylinder and the inlet of circulating hydraulic oil are openings inside the oil cylinder, the oil cylinder is connected with the end cover of the oil cylinder and sealed by a sealing ring, and the water injection hole upstream of the sample is the upstream gasket of the sample The upstream pad of the sample is directly inserted into the piston, the downstream water injection hole of the sample is the opening inside the downstream pad of the sample, the downstream pad of the sample is directly inserted into the end cover of the holder, and the core sample is placed in the test piece. Between the sample upstream pad and the sample downstream pad, the displacement sensor pillar is connected to the piston, and the displacement sensor pillar is connected to the pressure rod type displacement sensor. Simple in structure and easy to use, it can be used to study seepage-mechanics of porous media with different temperatures, different stress conditions, different pore pressures, and different 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 extraction and CO 2 Basic research in areas such as ...

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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