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Inverse emulsion polymer drag reducer, and preparation method and application thereof

An inverse emulsion and polymer technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of large amount of drag reducer and high cost, and achieve fast dispersion, low cost and easy preparation. Effect

Inactive Publication Date: 2017-04-19
中石化石油工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned drag reducer has the disadvantages of large dosage and high cost during use.

Method used

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  • Inverse emulsion polymer drag reducer, and preparation method and application thereof
  • Inverse emulsion polymer drag reducer, and preparation method and application thereof

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preparation example Construction

[0026] The invention provides a kind of preparation method of inverse emulsion polymer drag reducer, comprises the following steps:

[0027] A) Adding the water phase material to the oil phase material for emulsification to obtain a monomer emulsion;

[0028] The water phase material includes 130-165 parts by mass of water, 6-36 parts by mass of acrylic acid, 24-77 parts by mass of 2-acrylamido-2-methylpropanesulfonic acid, 32-82 parts by mass of organic amide quasi-monomer and 0.5 to 0.9 parts by mass of a hydrophilic emulsifier;

[0029] The oil phase material includes 104-120 parts by mass of base oil and 4-8 parts by mass of lipophilic emulsifier; the kinematic viscosity of the base oil at 40°C is 1.5mPa·s-3mPa·s;

[0030] B) Mix the monomer emulsion obtained in the step A) with the initiator at 20°C to 30°C, and after standing still, polymerize for 1h to 2h at a temperature of 50°C to 55°C to obtain inverse emulsion polymerization drag reducer;

[0031] The initiators ...

Embodiment 1

[0051] Add 165g of water to the reaction kettle, start stirring, add 9g of acrylic acid, 24g of 2-acrylamido-2-methylpropanesulfonic acid, 67g of acrylamide and 0.756g of Tween-80, and then use 30% hydrogen Sodium oxide solution adjusts the pH value of the system to 9.0 to obtain an aqueous phase;

[0052] Add 108g of 2# white oil and 6.84g of Span-80 into the reaction kettle, stir until completely dissolved, and obtain the oil phase;

[0053] Under stirring conditions, slowly add the obtained water phase into the oil phase, stir for 30 minutes, and emulsify at a high speed (14000 rpm) for 20 minutes to obtain a monomer emulsion;

[0054] Put the above emulsion into the reaction kettle, raise the temperature to 20°C, pass nitrogen gas for 30 minutes, add 0.02g ammonium persulfate, 0.01g sodium bisulfite and 0.02g azobisisobutyronitrile in sequence, stop stirring after 10 minutes, and let it stand 8h, at a temperature of 50°C, constant temperature reaction for 1h; after the co...

Embodiment 2

[0056] Add 130g of water to the reaction kettle, start stirring, add 12g of acrylic acid, 34g of 2-acrylamido-2-methylpropanesulfonic acid, 94g of acrylamide and 0.52g of Tween-80, and then use 30% hydrogen Sodium oxide solution adjusts the pH value of the system to 8.0 to obtain an aqueous phase;

[0057] Add 104g of 2# white oil and 4.68g of Span-80 into the reaction kettle, stir until completely dissolved, and obtain the oil phase;

[0058] Under stirring conditions, slowly add the obtained water phase into the oil phase, fully stir, emulsify at a high speed (14000rpm) for 30min, and obtain a monomer emulsion;

[0059] Put the above emulsion into the reaction kettle, raise the temperature to 30°C, pass nitrogen gas for 20min, add 0.1g potassium persulfate, 0.1g sodium metabisulfite and 0.01g azobisisobutyronitrile in sequence, stop stirring after 10min, and let it stand for 7h. Under the condition that the temperature is 50°C, react at constant temperature for 1 hour; afte...

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Abstract

The invention provides an inverse emulsion polymer drag reducer, and a preparation method and an application thereof. The method comprises the following steps: adding an aqueous-phase material into an oil-phase material, and carrying out emulsifying so as to obtain a monomer emulsion, wherein the aqueous-phase material comprises 130 to 165 parts by mass of water, 6 to 36 parts by mass of acrylic acid, 24 to 77 parts by mass of 2-acrylamido-2-methyl propane sulfonic acid, 32 to 82 parts by mass of an organic amide monomer and 0.5 to 0.9 part by mass of a hydrophilic emulsifier, and the oil-phase material comprises 104 to 120 parts by mass of base oil with a specific viscosity and 4 to 8 parts by mass of a lipophilic emulsifier; and mixing the monomer emulsion with an initiator at 20 DEG C to 30 DEG C, then carrying out standing, and carrying out a polymerization reaction under the condition of 50 DEG C to 55 DEG C for 1 h to 2 h so as to obtain the inverse emulsion polymer drag reducer. The inverse emulsion polymer drag reducer prepared by using the method provided by the invention has high drag reducing rate and low cost under the condition of small addition amount.

Description

technical field [0001] The invention relates to the technical field of oilfield water-soluble polymer materials, in particular to an inverse emulsion polymer drag reducer, its preparation method and its application. Background technique [0002] In the field of oil field drilling, the purpose of fracturing is to press the reservoir out of fractures, thereby increasing production. Among them, slick water hydraulic fracturing is a new fracturing technology developed based on slick water fracturing fluid system for shale oil and gas reservoirs, and it is one of the key technologies for shale gas development. Compared with the traditional gel fracturing system, the slick water fracturing fluid system is widely used in shale gas development because of its high efficiency and low cost. Slippery water fracturing fluid, also known as drag reducing water fracturing fluid, refers to a fracturing fluid formed by adding a certain amount of proppant and a very small amount of additives ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C08F220/06C08F220/54C08F2/32C09K8/68
Inventor 苏雪霞孙举李晓岚张高群王旭谢娟宋亚静张丽君
Owner 中石化石油工程技术服务有限公司
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