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 frac

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

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

[0036] The preparation method comprises the following 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 to the reaction kettle in turn, stir evenly, and keep the stirring state; Structural monomers and strong carbon dioxide-loving monomers should be fully stirred to completely dissolve the mo...

Example Embodiment

[0054] Example 1

[0055] Preparation and performance test of dry fracturing fluid drag reducing and thickening agent:

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

[0057] 2. Under the stirring state, firstly add 1.2 g of butanethiol and 1.2 g of dodecyl mercaptan, then add 1.5 g of azobisisobutyronitrile to initiate the polymerization reaction, and seal the reaction kettle; then raise the temperature to 100°C, and heat the reaction 8h, the whole process control the pressure in the kettle ≤0.4MPa.

[0058] 3. After the reaction is co...

Example Embodiment

[0060] Example 2

[0061] Preparation and performance test of dry fracturing fluid drag reducing and thickening agent:

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

[0063] 2. Under the stirring state, first add 0.5 g of dodecyl mercaptan and 0.5 g of hexadecyl mercaptan, and then add 2 g of benzoyl peroxide to initiate the polymerization reaction, and seal the reaction kettle; The reaction was carried out for 12h, and the pressure in the kettle was controlled to be less than or equal to 0.4MPa during the whole process.

[0064] 3. After the reaction...

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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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