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A kind of environment-friendly anti-high temperature shale inhibitor for water-based drilling fluid and preparation method thereof

A technology of shale inhibitor and water-based drilling fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of inability to effectively inhibit the hydration expansion of strong water-sensitive mud shale, difficult to apply to deep formation drilling, Poor high temperature resistance and other problems, to achieve strong shale inhibition performance, excellent environmental protection performance, and improve the effect of temperature resistance

Active Publication Date: 2021-01-26
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the deficiencies of the existing technology, especially the existing water-based drilling fluid shale inhibitors cannot effectively inhibit the hydration expansion of strong water-sensitive mud shale, poor high temperature resistance, and difficult to apply to deep formation drilling. The invention provides an environment-friendly anti-high temperature shale inhibitor for water-based drilling fluid and its preparation method
The environment-friendly anti-high temperature shale inhibitor of the present invention overcomes the disadvantages of poor inhibitory performance and poor high temperature resistance of existing inhibitors, and at the same time, the shale inhibitor of the present invention has good environmental protection performance and can be used for deep formation drilling

Method used

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  • A kind of environment-friendly anti-high temperature shale inhibitor for water-based drilling fluid and preparation method thereof
  • A kind of environment-friendly anti-high temperature shale inhibitor for water-based drilling fluid and preparation method thereof
  • A kind of environment-friendly anti-high temperature shale inhibitor for water-based drilling fluid and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A method for preparing an environment-friendly anti-high temperature shale inhibitor for water-based drilling fluid, comprising the following steps:

[0033] (1) Mix 50g of ethyl glucoside, 20g of butyl glucoside, 16g of 3-chloro-2-hydroxypropyltrimethylammonium chloride, and 50g of isopropanol, and stir at 300r / min and 80°C Under the condition of reaction for 6h, after the completion of the reaction, it was naturally cooled to room temperature to obtain the mixed solution A.

[0034] (2) Mix 15g of 2-acrylamido-2-methylpropanesulfonic acid, 2g of dimethyl diallyl ammonium chloride, and 30g of deionized water, and use a sodium hydroxide solution with a mass concentration of 20 wt%. Adjust the pH of the system to 7 to obtain the mixed solution B.

[0035] (3) Transfer mixed solution A and mixed solution B to a three-necked flask, mix well, deoxygenate with nitrogen for 20 minutes, and heat to 60°C; dissolve 0.1g of potassium persulfate in 2mL of distilled water to obtai...

Embodiment 2

[0037] A method for preparing an environment-friendly anti-high temperature shale inhibitor for water-based drilling fluid, comprising the following steps:

[0038] (1) Mix 60g of ethyl glucoside, 12g of 3-chloro-2-hydroxypropyltrimethylammonium chloride, and 50g of isopropanol evenly, and react for 6 hours at a stirring rate of 300r / min and 80°C. After completion, it was naturally cooled to room temperature to obtain a mixed solution A.

[0039] (2) 10g of 2-acrylamido-2-methylpropanesulfonic acid, 3g of sodium styrenesulfonate, 2g of dimethyl diallyl ammonium chloride, and 30g of deionized water are mixed uniformly, and the mass concentration is 20wt% sodium hydroxide solution adjusted the pH of the system to 7 to obtain a mixed solution B.

[0040] (3) Transfer the mixed solution A and the mixed solution B to a three-necked flask, mix well, deoxygenate with nitrogen for 20 minutes, and heat to 60°C; dissolve 0.1g of potassium persulfate in 2mL of distilled water to obtain an...

Embodiment 3

[0042] A method for preparing an environment-friendly anti-high temperature shale inhibitor for water-based drilling fluid, comprising the following steps:

[0043] (1) Mix 40g of hexyl glucoside, 20g of butyl glucoside, 15g of 3-chloro-2-hydroxypropyltrimethylammonium chloride, and 50g of isopropanol evenly, and stir at 300r / min and 80°C The reaction was carried out for 6 hours. After the reaction was completed, it was naturally cooled to room temperature to obtain a mixed liquid A.

[0044] (2) Mix 15g of 2-acrylamido-2-methylpropanesulfonic acid, 2g of dimethyl diallyl ammonium chloride, and 30g of deionized water, and use a sodium hydroxide solution with a mass concentration of 20 wt%. Adjust the pH of the system to 7 to obtain the mixed solution B.

[0045] (3) Transfer the mixed solution A and the mixed solution B to a three-necked flask, mix well, deoxygenate with nitrogen for 20 minutes, and heat to 60°C; dissolve 0.1g of potassium persulfate in 2mL of distilled water...

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Abstract

The invention provides an environment-friendly anti-high temperature shale inhibitor for water-based drilling fluid and a preparation method. The environment-friendly anti-high temperature shale inhibitor for water-based drilling fluid includes the following raw materials in parts by mass: 50-80 parts of alkyl polyglycoside, 5-30 parts of cationic etherifying agent, and 30-50 parts of isopropanol , 10-20 parts of high temperature resistant monomer, 1-3 parts of cationic monomer, 0.1-0.5 parts of initiator, 30-50 parts of water. The shale inhibitor of the invention has the advantages of strong inhibition, high mud shale rolling recovery rate, high temperature resistance and good environmental protection performance. The preparation method of the environment-friendly anti-high temperature shale inhibitor for water-based drilling fluid of the present invention has mild reaction conditions and simple operation.

Description

technical field [0001] The invention relates to an environment-friendly anti-high temperature shale inhibitor for water-based drilling fluid and a preparation method thereof, belonging to the field of oilfield chemistry in the petroleum industry. Background technique [0002] Wellbore instability is a problem often encountered in oil and gas drilling engineering. Wellbore instability will cause a series of downhole complex situations such as wellbore collapse, block loss, and necking, which seriously restrict the safety and efficiency of drilling engineering. The problem of wellbore instability is even more serious during horizontal drilling. Wellbore instability will greatly increase drilling costs and well construction time, and even lead to well abandonment in serious cases. At present, about 90% of wellbore instability occurs in shale formations, because shale is rich in clay minerals, and clay minerals will undergo hydration swelling when in contact with water-based dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035
CPCC09K8/035
Inventor 黄贤斌吕开河蒋官澄谭宾程荣超白杨刘敬平白英睿王金堂金家锋
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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