Aqueous solution and powder agent of intense shale inhibitor for water-based drilling fluid as well as preparation method and inhibitor of aqueous solution and powder agent

A technology for water-based drilling fluid and shale inhibitor, which is applied in the field of potent shale inhibitor water agent, inhibitor, powder and preparation thereof for water-based drilling fluid, and can solve the problem of large field application restrictions, environmental pollution, formation pollution and other problems, to achieve the effect of excellent structural stability, convenient use and pollution reduction

Inactive Publication Date: 2018-05-25
CHENGDU LEARN PRACTICES TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Oil-based drilling fluid is easy to use and is usually used to drill various complex wells. It has the characteristics of good wellbore stability, high integrity of cuttings, and good lubricity. However, the treatment of oil-based mud is a major problem at present, and it has serious environmental impact Contamination, and possible contamination of formations, increasing field application limitations

Method used

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  • Aqueous solution and powder agent of intense shale inhibitor for water-based drilling fluid as well as preparation method and inhibitor of aqueous solution and powder agent
  • Aqueous solution and powder agent of intense shale inhibitor for water-based drilling fluid as well as preparation method and inhibitor of aqueous solution and powder agent
  • Aqueous solution and powder agent of intense shale inhibitor for water-based drilling fluid as well as preparation method and inhibitor of aqueous solution and powder agent

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Experimental program
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preparation example Construction

[0067] The preparation method of the powerful shale inhibitor water agent for water-based drilling fluid comprises the following steps:

[0068] S1: mixing and stirring the amine compound and the first solvent to obtain the first mixture;

[0069] S2: adding halogenated olefins to the obtained mixture to obtain a second mixture;

[0070] S3: Take part of the second mixture to determine whether the reaction is complete;

[0071] S4: After confirming that the reaction is complete, add water to the second mixture, stir and distill to obtain an aqueous solution. In some embodiments, the S1 includes the following components in parts by mass:

[0072] Amine compounds: 20-50 parts

[0073] The first solvent: 2 to 10 parts.

[0074] In some embodiments, the S2 includes the following components in parts by mass: halogenated olefins: 15-30 parts.

[0075] In some embodiments, the S3 includes the following steps:

[0076] S31: Mix 200mL of dichloromethane and 100mL of anhydrous met...

Embodiment 1

[0106] ① Add 20 parts of amine compounds composed of N,N-dimethylethanolamine and N,N-dimethylpropanolamine, and 2 parts of the first solvent composed of methanol and ethanol into the reaction kettle at room temperature middle;

[0107] The ratio of N,N-dimethylethanolamine to N,N-dimethylpropanolamine is 2:1;

[0108] The ratio of methanol to ethanol is 2:1;

[0109] ②Stir in an oil bath at 50°C for 30 minutes until evenly mixed;

[0110] ③ Slowly add 15 parts of halogenated olefin formed by the combination of allyl chloride and allyl bromide into the reaction kettle dropwise, and keep the reaction temperature at 50°C during the dropwise addition;

[0111] The ratio of allyl chloride to allyl bromide is 2:1;

[0112] After the dropwise addition is completed, raise the temperature to 60°C to continue the reaction for 3 hours, and then sample and dilute;

[0113] ④ Add 200mL of dichloromethane and 100mL of anhydrous methanol into a 500mL glass bottle and mix well as a devel...

Embodiment 2

[0122] ① Combining 50 parts of amine compounds composed of N-methyldiethanolamine, triethanolamine, dodecyldiethanolamine, hexadecyldiethanolamine, octadecyldiethanolamine with acetone, isopropanol, ethylene glycol 10 parts of the first solvent formed by the combination of alcohols are added to the reaction kettle at room temperature;

[0123] The ratio of N-methyldiethanolamine, triethanolamine, dodecyldiethanolamine, hexadecyldiethanolamine and octadecyldiethanolamine is 3; 3:3:3:1;

[0124] ②Stir in an oil bath at 50°C for 30 minutes until evenly mixed;

[0125] ③ Slowly add 30 parts of allyl iodide into the reaction kettle dropwise, and keep the reaction temperature at 50°C during the dropwise addition;

[0126] After the dropwise addition is completed, raise the temperature to 60°C to continue the reaction for 3 hours, and then sample and dilute;

[0127] ④ Add 200mL of dichloromethane and 100mL of anhydrous methanol into a 500mL glass bottle and mix well as a developer...

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Abstract

The invention discloses an aqueous solution and a powder agent of an intense shale inhibitor for a water-based drilling fluid as well as a preparation method and an inhibitor of the aqueous solution and the powder agent. The intense shale inhibitor for the water-based drilling fluid disclosed by the invention is put into the water-based drilling fluid, redundant negative charges in clay can be neutralized through cation, and hydroxyl in molecules and oxygen atoms on the surface of the clay take a multi-hydrogen-bond function into play. Meanwhile, isolated double-bonds in the molecules and metal ions in the clay take a hydrogen-bond function into play. Therefore, by the means, an adhesion function is effectively improved, water molecules are prevented from entering a clay crystal layer to result hydration, and the purpose that clay minerals are expanded with water is achieved. In a word, the intense shale inhibitor for the water-based drilling fluid has a cation adsorption neutralization function and a hydroxyl adhesion function, has a relatively good inhibition function, in addition is good in dispersibility, is capable of keeping long-term stability, excellent in compound structure stability and is excellent in temperature resistance and salt resistance.

Description

technical field [0001] The invention relates to the technical field of oilfield chemistry, in particular to a powerful shale inhibitor water agent and powder for water-based drilling fluid, a preparation method thereof, and an inhibitor. Background technique [0002] In the past five years, China's shale gas exploration and development has achieved leapfrog development, becoming the third country after the United States and Canada to realize the industrial production of shale gas. In 2016, the shale gas production reached 7.882 billion m 3 . Based on the rapid development of shale gas exploration and development in China, drilling technology has also developed rapidly, and the drilling technology for some complex wells such as extended-reach wells, horizontal wells, high-temperature and high-pressure wells has also been improved. [0003] Oil-based drilling fluid is easy to use and is usually used to drill various complex wells. It has the characteristics of good wellbore s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/22C07C213/08C07C215/08C07C215/12
CPCC07C213/08C09K8/22C09K2208/12C07C215/08C07C215/12
Inventor 王继宇王梦莹任山张绍彬张远康庹红梅侯向前唐朝钧寇将
Owner CHENGDU LEARN PRACTICES TECH CO LTD
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