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Dry fracturing fluid anti-drag thickening agent and preparation method thereof

A technology of dry fracturing fluid and thickener, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., which can solve the problems of environmental protection, large thickening range, and less usage, and achieve excellent temperature resistance Shear ability and sand-carrying ability, convenient preparation, and high-efficiency viscosity-increasing effect

Active Publication Date: 2018-07-10
北京爱普聚合科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research results of scholars at home and abroad show that the thickening effect of the current liquid carbon dioxide fracturing fluid thickener is still not up to the effect of less usage, green environmental protection and large thickening range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The present invention also provides a preparation method for the aforementioned drag-reducing thickener for dry fracturing fluid. The drag-reducing thickener for dry fracturing fluid includes the following raw material components: 45-65% carbon dioxide-friendly solvent by mass percentage , oil-soluble solvent 10-15%, solubilizing monomer 5-10%, thickening monomer 15-20%, structural monomer 3-5%, strong carbon dioxide-friendly monomer 1-3%, oil-soluble chain transfer agent 0.5-1%, oil-soluble initiator 0.5-1%;

[0036] Described preparation method comprises the steps:

[0037] (1) Dissolution of monomer in solvent:

[0038] Keep the temperature in the reaction kettle at 30-40°C, add the formula amount of carbon dioxide-friendly solvent and oil-soluble solvent in turn into the reaction kettle, stir evenly, and keep stirring; then add the formula amount of solubilizing monomer, viscosity-increasing monomer, Structural monomers and strong carbon dioxide-friendly monomers,...

Embodiment 1

[0055] Preparation and performance test of drag-reducing thickener for dry fracturing fluid:

[0056] 1. Keep the temperature in the reactor at 35°C, add 194.1g of propylene carbonate, 18g of white oil, and 18g of petroleum ether to the reactor in sequence, stir evenly, and keep stirring; then add 6g of ethyl propylene ether, n-propyl ethylene in sequence 9g of ether, 24g of methyl acrylate, 12g of methyl methacrylate, 6g of stearyl acrylate, 6g of styrene, and 3g of allyl methyl carbonate were stirred thoroughly to completely dissolve the monomers.

[0057] 2. While keeping stirring, first add 1.2g of butanethiol and 1.2g of dodecylmercaptan, then add 1.5g of azobisisobutyronitrile to initiate the polymerization reaction, and seal the reaction vessel; then raise the temperature to 100°C and keep it warm for the reaction 8h, the pressure in the kettle is controlled throughout the process to be ≤0.4MPa.

[0058] 3. After the reaction, the jacket of the reactor is circulated th...

Embodiment 2

[0061] Preparation and performance test of drag-reducing thickener for dry fracturing fluid:

[0062] 1. Keep the temperature in the reactor at 40°C, add 127g of dimethyl carbonate, 12g of silicone oil, and 18g of petroleum ether in sequence in the reactor, stir evenly, and keep stirring; then add 4g of divinyl ether and 4g of ethyl propylene ether in sequence , 12g of ethyl acrylate, 8g of ethyl methacrylate, 2g of stearyl methacrylate, 4g of methyl styrene, 6g of allyl ethyl carbonate, fully stir to dissolve the monomer completely.

[0063] 2. While keeping stirring, first add 0.5g of dodecyl mercaptan and 0.5g of hexadecyl mercaptan, then add 2g of benzoyl peroxide to initiate the polymerization reaction, seal the reaction kettle; then raise the temperature to 90°C and keep warm React for 12 hours, and control the pressure in the kettle to ≤0.4MPa throughout the process.

[0064] 3. After the reaction, the jacket of the reaction kettle is circulated through the cooling wat...

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Abstract

The invention discloses a dry fracturing fluid anti-drag thickening agent and a preparation method thereof. The dry fracturing fluid anti-drag thickening agent comprises, by mass, 45-65% of carbon-dioxide-philic solvent, 10-15% of oil-soluble solvent, 5-10% of hydrotropy monomer, 15-20% of tackifier monomer, 3-5% of structural monomer, 1-3% of super-carbon-oxide-philic monomer, 0.5-1% of oil-soluble chain transfer agent and 0.5-1% of oil-soluble initiator. The dry fracturing fluid anti-drag thickening agent is convenient to prepare and use, has super-fast solubility, efficient thickening performance, excellent temperature and shear resistance capacity, excellent sand carrying capacity and efficient drag reduction performance.

Description

technical field [0001] The invention relates to a fracturing fluid thickener in oilfield chemicals, and belongs to the technical field of fracturing production stimulation, in particular to a dry-process fracturing fluid drag-reducing thickener and a preparation method thereof. Background technique [0002] The so-called dry fracturing is to use 100% liquid carbon dioxide as the sand-carrying fluid. Due to the particularity of the liquid used, it has the following advantages: (1) Anhydrous phase: the fracturing fluid is 100% pure liquid carbon dioxide, thus avoiding damage to the formation caused by water in conventional fracturing fluids; (2) no Residue: After the fracturing operation is completed, due to heat exchange and pressure diffusion, the liquid carbon dioxide in the reservoir is gasified into a gaseous state and quickly returned to the ground, so there is no fracturing fluid residue; (3) Economical: Compared with conventional fracturing fluids , the flowback time ...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F220/18C08F212/08C08F212/06C08F212/12C08F218/00C08F216/20C08F216/12C09K8/62
CPCC08F220/14C08F220/18C08F220/1804C09K8/62C08F220/1818C08F212/08C08F212/06C08F212/12C08F218/24C08F216/12C08F216/20
Inventor 郑焰罗于建白小丹
Owner 北京爱普聚合科技有限公司
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