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Oil-based fluid loss additive for drilling fluid and preparation method thereof

A technology of oil-based drilling fluid and fluid loss control agent, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor dispersion, environmental pollution, poor dispersion, etc., and achieve good compatibility and preparation technology. Simple, environmentally friendly effects

Active Publication Date: 2018-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In China, there are relatively few developments of fluid loss control agents for oil-based drilling fluids, mainly asphalt and organic amine-modified humic acid fluid loss control agents. Among them, asphalt products have the disadvantages of polluting the environment, using a large amount, and affecting the drilling speed. Disadvantages: In the current commonly used oil-based drilling fluid formulations, its use has been restricted; organic amine-modified humic acid fluid loss reducers have the disadvantage of poor dispersion in oil-based drilling fluids, especially in low-toxic and environmentally friendly Among the base oils, the dispersibility is worse, and the fluid loss reduction effect still has a certain gap compared with asphalt products.

Method used

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  • Oil-based fluid loss additive for drilling fluid and preparation method thereof
  • Oil-based fluid loss additive for drilling fluid and preparation method thereof
  • Oil-based fluid loss additive for drilling fluid and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Under the protection of nitrogen, add 120 parts of 45% NaOH solution, 500 parts of isopropanol, 50 parts of refined cotton to the reaction kettle, stir well, alkalinize at 20°C for 1 hour, add 100 parts of chloroacetic acid, and heat up to 50 After reacting at ℃ for 1 hour, adjust the pH value to 4-6 with glacial acetic acid, add 100 parts of octadecyl primary amine, raise the temperature to 140 ℃ and react for 1 hour, and press filter to obtain the oil-based drilling fluid fluid loss reducer.

Embodiment 2

[0016] Under the protection of nitrogen, add 100 parts of 47% NaOH solution, 400 parts of isopropanol, 50 parts of refined cotton to the reaction kettle, stir thoroughly, alkalinize at 20°C for 1 hour, add 137 parts of chloroacetic acid, and heat up to 50 After reacting at ℃ for 1 hour, adjust the pH value to 4-6 with glacial acetic acid, add 200 parts of tetradecyl primary amine, raise the temperature to 140 ℃ and react for 1 hour, and press filter to obtain the oil-based drilling fluid fluid loss reducer.

Embodiment 3

[0018] Under the protection of nitrogen, add 100 parts of 46% NaOH solution, 400 parts of toluene, 50 parts of refined cotton to the reaction kettle, stir thoroughly, alkalinize at 20°C for 1.5h, add 120 parts of chloroacetic acid, and heat up to 50°C After reacting for 2 hours, adjust the pH value to 4-6 with glacial acetic acid, add 150 parts of cetyl primary amine, raise the temperature to 150° C. and react for 2 hours, and press filter to obtain the oil-based drilling fluid fluid loss additive.

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Abstract

The invention relates to an oil-based fluid loss additive for drilling fluid and a preparation method thereof. Under the nitrogen gas protection, NaOH solution, organic solvents and refining cotton are sequentially added into a reaction kettle; alkalization treatment is performed for 1 to 2h at 20 to 25 DEG C; chloroactic acid is added; the temperature is raised to 50 to 80 DEG C; after the reaction for 1 to 2h, the pH value is regulated to 4 to 6 by glacial acetic acid; organic amine is added; the temperature is raised to 140 to 180 DEG C; after the reaction for 1 to 2h, materials are discharged to obtain the oil-based fluid loss additive for drilling fluid. The oil-based fluid loss additive for drilling fluid can be applied to diesel oil, white oil and synthetic drilling fluid system; the product achieves the environment-friendly effects; the fluid loss reduction effect is obvious; the preparation method and the required equipment conditions are simple; the implementation is easy.

Description

technical field [0001] The invention relates to a fluid loss reducer for oil-based drilling fluid and a preparation method thereof. The fluid loss reducer for oil-based drilling fluid prepared by the invention is suitable for the technical field of oilfield drilling engineering. Background technique [0002] In recent years, with the continuous increase of energy demand at home and abroad, oil exploration and development have gradually drilled into deep and complex formations, and the number of complex wells such as deep wells, ultra-deep wells, highly deviated wells, multi-branch wells, and horizontal wells is increasing. In addition, for the development of unconventional oil and gas resources, the demand for oil-based drilling fluids is gradually increasing. As an essential component of drilling fluid treatment agent, fluid loss reducer is mainly used to make the drilling fluid form a thin and dense mud cake on the well wall, thereby reducing fluid loss and improving the q...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/32C08B15/06C08B3/14
CPCC08B3/14C08B15/06C09K8/035C09K8/32C09K2208/12
Inventor 封心领袁俊秀靳志超逯贵广庞雨微
Owner CHINA PETROLEUM & CHEM CORP
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