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Oil-based drilling fluid flow pattern regulator and preparation method thereof

A technology of flow regulator and oil-based drilling fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor shear dilution, unfavorable drilling speed increase, and polluted reservoirs, so as to improve the performance of colloids Effect

Active Publication Date: 2016-02-24
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the actual use of oil-based drilling fluid, it is difficult to adjust the flow pattern, especially in the process of drilling long horizontal sections.
Organoclay is currently widely used as a flow regulator for oil-based drilling fluids. In actual use, there are problems such as high dosage, poor shear dilution, easy to thicken and even pollute reservoirs, which is not conducive to increasing drilling speed, etc.

Method used

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  • Oil-based drilling fluid flow pattern regulator and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The purified 16g styrene and 4g methyl acrylate are transferred to the reactor with reflux condensation and stirring device, then add maleic acid diethylenyl bis[(octadecyl di Methyl) ammonium chloride] and the mixture solution of toluene (which contains 4g diethylmaleic acid diethylenyl two [(octadecyl dimethyl) ammonium chloride] and 100g toluene), start stirring device, Set the stirring rate to 1000r / min and keep it for 15min. Under the condition of bubbling high-purity nitrogen to remove oxygen, the mixing rate is controlled at 300r / min, the reflux condensation and heating device is started, and the set temperature is 75°C. When the temperature in the reaction kettle reaches 70°C, add 0.37g of dibenzoyl peroxide into the kettle, pass nitrogen and keep it warm for 3 hours to obtain the oil-based drilling fluid flow pattern regulator P-I of the present invention.

Embodiment 2

[0025] Transfer the refined 6g styrene, 6g methylstyrene and 4g isobutyl acrylate to a reaction kettle with a reflux condensation and stirring device, and then add maleic acid diethylenylene bis A mixture solution of [(hexadecyldimethyl)ammonium chloride] and toluene (which contains 4g diethylmaleic acid diethylenyl bis[(hexadecyldimethyl)ammonium chloride] and 80g toluene), start the stirring device, set the stirring rate to 2000r / min, and keep it for 10min. Under the condition of continuously blowing high-purity nitrogen gas to remove oxygen, the mixing rate is controlled at 400r / min, the reflux condensation and heating device is started, and the set temperature is 80°C. When the temperature in the reaction kettle reaches 70°C, add 0.50 g of dibenzoyl peroxide into the kettle, pass nitrogen and keep it warm for 3 hours to obtain the oil-based drilling fluid flow pattern regulator P-II of the present invention.

Embodiment 3

[0027] Transfer 10g of styrene, 8g of 3-methylstyrene, 2g of methyl acrylate, and 3g of isobutyl acrylate to a reaction kettle with a reflux condensation and stirring device after refining, and then add maleic acid in the reaction kettle A mixture solution of diethylenyl bis[(tetradecyldimethyl)ammonium chloride] and cyclohexane (which contains 6.5 g diethylmaleic acid diethylenyl bis[(tetradecyl dimethyl) Methyl)ammonium chloride] and 130g cyclohexane), start the stirring device, set the stirring rate as 2000r / min, and keep it for 10min. Under the condition of continuously feeding high-purity nitrogen gas and bubbling to remove oxygen, start the reflux condensation and heating device, set the temperature at 75°C, and control the stirring rate at 500r / min. When the inside of the reactor reaches 60°C, add 0.64 g dibenzoyl peroxide, and heat preservation reaction with nitrogen for 5 hours to obtain the oil-based drilling fluid flow pattern regulator P-III of the present inventio...

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Abstract

The invention relates to an oil-based drilling fluid flow pattern regulator which is obtained in the mode that a styrene monomer, an acrylic monomer and a monomer which contains amino groups and is provided with a polymerize function are polymerized in solvent under the function of an initiating agent; a product molecular chain of the oil-based drilling fluid flow pattern regulator is provided with abundant amino groups, the amino groups can achieve a multi-point adsorption function with the organic soil surface, and drilling fluid colloid performance is improved.

Description

technical field [0001] The invention relates to an oil-based drilling fluid flow pattern regulator and a preparation method thereof, belonging to the technical field of oilfield chemistry. Background technique [0002] Oil-based drilling fluid has good wellbore stability and reservoir protection performance, and has become an important means to solve various complex formation structures and wellbore structures in drilling operations. It has been widely used in the exploration and development of oil and gas resources. [0003] However, oil-based drilling fluid has the problem of difficult flow pattern adjustment in actual use, especially in the process of drilling long horizontal sections. Organoclays are currently widely used flow pattern regulators for oil-based drilling fluids. In actual use, there are problems such as high dosage, poor shear dilution, easy to thicken and even pollute reservoirs, which is not conducive to increasing drilling speed. Therefore, my country ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/32C08F212/08C08F220/14C08F222/22C08F220/16C08F212/12
CPCC09K8/035C09K8/32C08F212/08C08F212/12C08F220/1804C08F222/225C08F220/14
Inventor 马诚毛微康晓雪林子扬
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY