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Rock core holder for mud dynamic pollution experiment

A core holder and dynamic technology, applied in the field of formation evaluation in oil and gas fields, can solve problems such as limited accuracy and large errors, and achieve the effects of improving accuracy, eliminating gaps, and improving sealing performance

Pending Publication Date: 2020-01-07
CHENGDU NORTH OIL EXPLORATION DEV TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a core holder for mud dynamic pollution experiments, to solve the problems of relatively large errors and limited accuracy in the simulation of mud dynamic pollution experiments in the prior art, and to provide a special tool for mud dynamic pollution experiments. Core holder, the purpose of improving the accuracy of objective parameters during the simulation experiment

Method used

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  • Rock core holder for mud dynamic pollution experiment
  • Rock core holder for mud dynamic pollution experiment

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 and figure 2The shown core holder for mud dynamic pollution experiments includes a sleeve 1, a first plug 2 and a second plug 3 detachably connected to both ends of the sleeve 1, and a diaphragm is set inside the sleeve 1 4. The diaphragm 4 is surrounded by a cylindrical structure coaxial with the sleeve 1, the hollow area formed by the diaphragm 4 is the core clamping area 5, and the confining pressure area is between the outer wall of the diaphragm 4 and the inner wall of the sleeve 1 6. A pressure port 7 communicating with the confining pressure area 6 is provided on the surface of the sleeve 1 .

[0029] In this embodiment, the diaphragm 4 is made of elastic silica gel, and a pressure gauge for monitoring the pressure in the confining pressure area 6 is arranged on the pressure port 7, and the pressure port can be closed.

Embodiment 2

[0031] Such as figure 1 and figure 2 The shown core holder for the mud dynamic pollution experiment, on the basis of Example 1, both ends of the sleeve 1 are provided with annular bosses 10 protruding toward the inner direction of the sleeve 1, and the diaphragm 4 is fixed on the annular boss 10. The diaphragm 4 is fixedly connected to the radially outward side surface of the annular boss 10 . The diaphragm 4 includes a cylindrical main body 401, the two ends of the main body 401 are sealing parts 402; the outer diameters of the main body 401 and the sealing part 402 are equal, and the inner diameter of the main body 401 is smaller than the inner diameter of the sealing part 402; Two ends of the main body part 401 are pressed against the annular bosses 10 at both ends, and the inner wall of the sealing part 402 is attached to the radially outward side surface of the annular boss 10 . The sealing portion 402 is bonded to the annular boss 10 or / and connected by bolts 11 . A...

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Abstract

The invention discloses a rock core holder for a mud dynamic pollution experiment. The holder comprises a sleeve, first and second plugs and a membrane, the first and second plugs are detachably connected to the two ends of the sleeve respectively, the membrane is arranged in the sleeve and forms a cylindrical structure coaxial with the sleeve, a hollow area formed by the membrane in a surroundingmode is a rock core clamping area, a confining pressure area is arranged between the outer wall of the membrane and the inner wall of the sleeve, and a pressurizing opening communicated with the confining pressure area is formed in the surface of the sleeve. The provided rock core holder for the mud dynamic pollution experiment can solve the problems that simulation of the mud dynamic pollution experiment has a large error and limited in accuracy, the special-purposed rock core holder is realized for the mud dynamic pollution experiment, and objective parameters in the experiment process aresimulated more accurately.

Description

technical field [0001] The invention relates to the field of formation evaluation of oil and gas fields, in particular to a rock core holder used for mud dynamic pollution experiments. Background technique [0002] The core holder is a device used to hold, protect the rock sample and seal the cylinder or end face (usually the end face of the fluid inlet and outlet) when measuring the seepage characteristics of the rock sample or carrying out the displacement test in the laboratory. Indispensable and important auxiliary parts in the device. The existing core holder simulates the applied confining pressure through a rigid shell, which can simulate the formation confining pressure for the conventional measurement of physical parameters such as core permeability and porosity, so it meets the demand. However, with the continuous deepening of the understanding of the formation and the continuous refinement of the oil and gas field development plan, the pollution and damage of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/0806G01N15/082
Inventor 米中荣何冰袁浩周长江韩炜岑玉达符奇徐兵杨鸿黄凯万传治张春琳刘家材张小平杜新龙李辰
Owner CHENGDU NORTH OIL EXPLORATION DEV TECH
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