A kind of manufacturing method of artificial coal core standard test piece

A technology of standard test pieces and production methods, which is applied in the preparation, sampling, and instrumentation of test samples. It can solve the problems of cumbersome operation, high failure rate, and large size, and achieve good repeatability, make up for poor repeatability, and facilitate operation. Effect

Active Publication Date: 2020-02-04
CHINA UNITED COALBED METHANE NAT ENGRES CENT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, artificial coal cores must also be used in the reservoir sensitivity evaluation experiments of loose coal seams, but the existing artificial coal core preparation molds are large in size, cumbersome to operate, and have a relatively high failure rate

Method used

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  • A kind of manufacturing method of artificial coal core standard test piece
  • A kind of manufacturing method of artificial coal core standard test piece
  • A kind of manufacturing method of artificial coal core standard test piece

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] A kind of manufacture method of artificial coal core standard test piece provided by the invention, described method comprises the following steps:

[0034] 1) Select a coal sample and prepare coal particles of the desired particle size;

[0035] 2) Select formation water or standard brine as the binder;

[0036] 3) mixing the coal particles in step 1) and the binder in step 2) uniformly in a certain proportion;

[0037] 4) put the homogeneously mixed sample in step 3) into the coal core mold several times, and compact each time the homogeneously mixed sample is added;

[0038] 5) After completing step 4), pressurize at a constant speed to the preset pressure and keep the pressure constant;

[0039] 6) After the preset pressure is mainta...

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Abstract

The invention belongs to the technical field of artificial coal core standard sample preparation, and particularly relates to a method for preparing an artificial coal core standard sample. The method includes the following steps: 1) preparing coal particles with required sizes; 2) selecting ground layer water or normal saline as a binder; 3) mixing the coal particles and the binder evenly in a certain proportion; 4) placing the evenly-mixed sample in a coal core mold by several times, and conducting compaction for once each time the sample is added; 5) conducting pressurizing at a constant speed to a preset pressure, and maintaining the preset pressure constant; 6) after maintaining the preset pressure for a certain time, removing the coal core mold; 7) placing guide pads at the two ends of the pressed coal core for packaging. The prepared artificial coal core is stable in permeability and good in repeatability, and provides a reliable basis and means for the evaluation of seepage experiments.

Description

technical field [0001] The invention belongs to the technical field of preparation of artificial coal core standard test pieces, in particular to a manufacturing method of artificial coal core standard test pieces. Background technique [0002] In the field of coalbed methane exploration and development technology, a series of evaluation tests will be carried out to evaluate the degree of damage to the reservoir by the drilling fluid, completion fluid and fracturing fluid in the coal reservoir and the drilling process. In the experiment, in order to be able to simulate the real coal seam to study the characteristics of the coal seam, so as to develop the coalbed methane efficiently, it is necessary to rely on the artificial coal core. At present, artificial coal cores must also be used in reservoir sensitivity evaluation experiments of loose coal seams, but the existing artificial coal core preparation molds are large in size, cumbersome to operate, and have a relatively hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 胡雄梁为朱学光马良徐博瑞黄伟强成前辉魏振吉侯厶靖
Owner CHINA UNITED COALBED METHANE NAT ENGRES CENT
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