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A kind of separation and extraction method of organic clay complex in black shale

A technology for black shale and organoclay, which is applied in the field of separation and extraction of organoclay composites, and can solve the problems of detecting black shale machine clay composites, stagnation, and inability to advance.

Active Publication Date: 2021-11-30
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because there is no relevant technical means for separating and extracting the organoclay complex at home and abroad, and there is no relevant technical means for detecting whether there is an organoclay complex in black shale, so this work has been stagnant. forward, unable to advance

Method used

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  • A kind of separation and extraction method of organic clay complex in black shale
  • A kind of separation and extraction method of organic clay complex in black shale
  • A kind of separation and extraction method of organic clay complex in black shale

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Experimental program
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Embodiment 1

[0034] Embodiment 1 of the present invention: a method for separating and extracting organoclay complexes in black shale, comprising the following steps:

[0035] A. Weigh the black shale raw material, grind the raw material to less than 1mm with a disc grinder, and then grind the sample to less than 0.2um with a star grinder, mix the raw material and set it aside, then heat it at 40°C Dry for 2.5 hours under the same conditions;

[0036]B. Put the dried raw materials into the container, and then gradually add a dilute hydrochloric acid solution with a mass fraction of 2%, the dilute hydrochloric acid solution will react with the carbonate in the raw material, so as to achieve the purpose of removing the carbonate in the raw material Purpose, the reaction process will be accompanied by the generation of bubbles. The choice of a dilute hydrochloric acid solution with a mass fraction of 2% is not to use a higher concentration of hydrochloric acid, mainly to avoid the high conce...

Embodiment 2

[0043] Embodiment 2 of the present invention: a method for separating and extracting organoclay complexes in black shale, comprising the following steps:

[0044] A. Weigh the black shale raw material, grind it to less than 1mm with a disc grinder, and then grind the sample to less than 0.2um with a star grinder, mix the raw material and set aside, then set aside at 50°C Dry under low temperature for 2 hours;

[0045] B. Put the dried raw materials into the container, and then gradually add a dilute hydrochloric acid solution with a mass fraction of 2%, the dilute hydrochloric acid solution will react with the carbonate in the raw material, so as to achieve the purpose of removing the carbonate in the raw material Purpose, the reaction process will be accompanied by the generation of bubbles. The choice of a dilute hydrochloric acid solution with a mass fraction of 2% is not to use a higher concentration of hydrochloric acid, mainly to avoid the high concentration of hydrochl...

Embodiment 3

[0052] Embodiment 3 of the present invention: a method for separating and extracting organoclay complexes in black shale, comprising the following steps:

[0053] A. Weigh the black shale raw material, grind it to less than 1mm with a disc grinder, and then grind the sample to less than 0.2um with a star grinder, mix the raw material for later use, and then grind it at 60°C Dry for 1.5 hours under the same conditions;

[0054] B. Put the dried raw materials into the container, and then gradually add a dilute hydrochloric acid solution with a mass fraction of 2%, the dilute hydrochloric acid solution will react with the carbonate in the raw material, so as to achieve the purpose of removing the carbonate in the raw material Purpose, the reaction process will be accompanied by the generation of bubbles. The choice of a dilute hydrochloric acid solution with a mass fraction of 2% is not to use a higher concentration of hydrochloric acid, mainly to avoid the high concentration of...

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Abstract

The invention discloses a method for separating and extracting organoclay composites in black shale. The black shale is pulverized, dried, and then placed in a container; dilute hydrochloric acid solution is added, and its changes are observed. When no bubbles are generated, stop adding the dilute hydrochloric acid solution, filter to take the filter residue, add deionized water, and then add the ammonia solution. During the stirring process, use a pH tester to measure the pH value of the solution. When the pH reaches 7, stop adding the ammonia solution. , filter to get the filter residue, then rinse with deionized water; dry the filter residue, then put it into a container, add deionized water, and put it into an ultrasonic processor for ultrasonic treatment; leave the container to stand for treatment, and extract the suspension; The suspension is put into a centrifuge for centrifugation to obtain a slurry; the slurry can be dried and pulverized. The extraction method can effectively extract the organoclay complex in the black shale, thereby creating conditions for the study of the characteristics of the adsorption state of rock gas.

Description

technical field [0001] The invention relates to a separation and extraction method, in particular to a separation and extraction method for organic clay complexes in black shale. Background technique [0002] Guizhou is rich in Lower Cambrian black shale resources, and its potential reserves of shale gas resources are huge (Xu Guosheng et al., 2011), with resources as high as 10.48 trillion cubic meters, accounting for 12.79% of the country. The occurrence modes of shale gas in black shale reservoirs include adsorption state, free state, and dissolved state, among which the adsorption state and free state are the most important occurrence modes, and the proportion of adsorbed natural gas even exceeds that of free natural gas. Previous studies have shown that in the Lower Cambrian reservoirs in Guizhou Province, the proportion of adsorbed natural gas is relatively high, and the reservoirs are dominated by organoclay complexes. The gas adsorption capacity of organoclay aggreg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N1/34G01N1/44
Inventor 毛瑞勇张玉松吴林杨雅鑫田茂军
Owner GUIZHOU UNIV