A core holder

A technology of core holder and cylinder, which is applied in the field of petroleum energy engineering, can solve problems such as interference and affecting the imaging operation of the low-field nuclear magnetic resonance imaging analysis system, and achieve the effect of preventing interference

Active Publication Date: 2011-12-21
CHINA UNITED COALBED METHANE NAT ENGRES CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, during the process of using nuclear magnetic resonance, the temperature change of the core holding device used will interfere with the probe coil of nuclear magnetic resonance, and affect the imaging operation of the low-field nuclear m

Method used

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Example Embodiment

[0017] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] figure 1 It is a schematic structural diagram of a core holder in a specific embodiment of the present invention; such as figure 1 As shown, the core holder includes: a cylinder 9, a sample tube 7, a fixed plug 14, an adjustable plug 3, a thermal insulation sleeve 8, and a top sealing cover 4, wherein,

[0019] In an embodiment of the present invention, the cylinder 9 is made of engineering plastics. The cylinder 9 has a confining pressure chamber 10 formed by an upper step portion 15 and a lower step portion 16, and a sample is placed in the confining pressure chamber 10 Tube 7, the outer side of the cylinder 9 is sheathed with a thermal insulation sleeve 8; among them, the lower part 16 at the bottom of the cylinder 9 is threaded, which is m...

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Abstract

The invention discloses a core holder. The core holder comprises a cylinder, a sample tube, a fixed plug, an adjustable plug, a heat insulation sleeve and a top sealing cover, wherein the cylinder is made of engineering plastic; a confining pressure cavity for accommodating the sample tube is formed in the cylinder; the heat insulation sleeve is sleeved outside the cylinder; a lower stepped part of the bottom end of the cylinder is provided with threads which are matched with threads of the fixed plug; the bottom end of the cylinder is sealed; an upper stepped part of the top end of the cylinder is provided with threads which are matched with the top sealing cover and the adjustable plug and seal the top of the cylinder; and a channel for displacing fluid circulation and a channel for confining fluid circulation are formed in the fixed plug and the adjustable plug. By the core holder, severe interference of temperature change of the core holder on a nuclear magnetic resonance probe coil can be avoided in a high-temperature high-pressure state.

Description

technical field [0001] The invention relates to the field of petroleum energy engineering, in particular to a rock core holder. Background technique [0002] In the field of petroleum and energy engineering, due to the non-destructive nature of nuclear magnetic resonance detection, the components of the material can be analyzed through the relaxation time map data without destroying the material structure; through the nuclear magnetic resonance imaging system, it is possible to carry out non-destructive and non-invasive imaging analysis of the material ; The NMR system can also be used to perform experiments on conventional parameters (such as permeability, porosity, saturation, etc.) of reservoir cores. Due to its non-destructive, fast, accurate and repeatable characteristics, and the ability to achieve functions that cannot be achieved by other conventional detection and analysis methods, nuclear magnetic resonance has become an internationally recognized detection technol...

Claims

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Application Information

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IPC IPC(8): G01N24/08G01N15/08
Inventor 梁为俞文文彭宏钊张英力魏振吉刘利荣成前辉胡雄
Owner CHINA UNITED COALBED METHANE NAT ENGRES CENT
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