Core holder

A core holder and core technology, applied in the field of oil and gas exploration and development, can solve problems such as affecting the stability of experimental results, failing to meet the requirements of the temperature and pressure test experiments for simulating tight oil reservoirs, and drifting the resonance frequency. It is beneficial to oil and gas exploration and development, meets the requirements of test experiments, and is easy to load and unload.

Active Publication Date: 2015-09-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
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AI Technical Summary

Problems solved by technology

From the perspective of effect, during the use of the first type of core holder, the RF coil is under high temperature and high pressure, and the resonance frequency of the RF coil parameters will drift, and the resonance frequency parameters need to be adjusted frequently, which affects the stability of the experimental results.
Secondly, since the sealing end cover is made of fluoroplastic, pressure leakage will occur when the ring pressure rises at the seal of the ring pressure oil inlet pipe and oil discharge pipe, and the displacement oil inlet pipe and oil outlet pipe on the sealing end cover.
D

Method used

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] like figure 1 A specific embodiment of the core holder of the present invention is shown. In this embodiment, the core holder includes a cylinder body 6 made of glass fiber reinforced plastic material, a core assembly set in the cylinder body 6, left and right mandrel end seat assemblies connected to both ends of the core assembly, and a cylinder body 6 The left and right connecting sleeves 4 and 20 are in sealing connection with the left and right mandrel end seat assemblies. Moreover, the cylinder body 6 , the rock core assembly and the left and right mandrel end seat assemblies together form the annular pressure chamber 14 in the cylinder body 6 . The annular pressure chamber 14 bears the annular pressure applied to the core 11 . In addition, the left and right ends of the barrel 6 are stepped structures, and external threads are p...

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Abstract

The invention discloses a core holder, which includes: a nonmetal high pressure resistant cylinder; a core component disposed in the cylinder; a left mandrel end seat assembly and a right mandrel end seat assembly that are respectively disposed at the left end and right end of the cylinder and are connected with the left end and the right end of the core component; a ring crush cavity formed by the cylinder, the core component, and the left mandrel end seat assembly and the right mandrel end seat assembly; and a left connecting sleeve and a right connecting sleeve, with the left connecting sleeve being used for connecting the cylinder left end and the left mandrel end seat assembly, and the right connecting sleeve being used for connecting the cylinder right end and the right mandrel end seat assembly. The core holder provided by the invention is difficult to leak, can withstand higher pressure, and can better meet the experimental requirements, thereby being more conducive to oil-gas exploration and development.

Description

technical field [0001] The invention relates to the field of oil and gas exploration and development, in particular to a rock core holder. Background technique [0002] The application of nuclear magnetic resonance technology in petroleum exploration and development mainly focuses on the analysis and evaluation of reservoir structure, the distribution characteristics of fluid in oil and gas reservoir rocks, and the study of seepage mechanism, etc. These research work are carried out visually by using nuclear magnetic resonance technology. If it is to be carried out under high temperature and high pressure conditions, it is necessary to develop and design a nuclear magnetic resonance core holder specially used for oil exploration and development research. The core holder is a core experimental device used to simulate the high temperature and high pressure conditions of the formation. The core NMR experiment is to put the core containing oil and water into the radio frequency...

Claims

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Application Information

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IPC IPC(8): G01N24/08
Inventor 郎东江伦增珉吕成远潘伟义王锐王海涛赵春鹏周霞赵清民张栋
Owner CHINA PETROLEUM & CHEM CORP
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