Acrylamide polymer thickener and preparation method thereof, and fracturing fluid

A technology of acrylamide and polymer, applied in the field of oil field additives, can solve the problems of poor shear stability, poor temperature and salt resistance, etc., and achieve the effects of good viscosity increase, less environmental pollution, and good drag reduction performance.

Active Publication Date: 2016-11-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an acrylamide polymer thickener, which solves the technical problems of poor temperature and salt resistance and poor shear stability of polymer thickeners in the prior art, and the prepared acrylamide polymer The thickener has high temperature resistance and can effectively meet the field construction requirements of slick water fracturing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this embodiment, the raw material composition and the quality of each component of the acrylamide polymer thickener are as follows:

[0039] Hydrophilic acrylic monomer: It is composed of acrylamide, acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid in a mass ratio of 14:3:3.

[0040] Mass: 44g;

[0041] Hydrophobic acrylic monomer: octadecyl acrylate, mass: 8.8g;

[0042] Emulsifier: sodium lauryl sulfate, quality: 2.2g;

[0043] Initiator: potassium persulfate-sodium thiosulfate initiation system, mass: 0.6g;

[0044] Water: 144.4g;

[0045] Latent crosslinking agent: hydroxyethyl acrylate, mass: 0.27g;

[0046] Concrete preparation process is as follows:

[0047] Dissolve 44g of acrylamide, acrylic acid, and 2-acrylamide-2-methylpropanesulfonic acid in a mass ratio of 14:3:3 into 144.4g of water. After fully dissolving, The pH value of the solution is adjusted to 8-10 with a mass fraction of 20% to 40% sodium hydroxide aqueous solution, then add 2.2...

Embodiment 2

[0051] In this embodiment, the raw material composition and the quality of each component of the acrylamide polymer thickener are as follows:

[0052] Hydrophilic acrylic monomer: It is composed of acrylamide, methacrylic acid and 2-acrylamide-2-methylpropanesulfonic acid in a mass ratio of 14:3:3.

[0053] Mass: 46g;

[0054] Hydrophobic acrylic monomer: octadecyl methacrylate, mass: 9.2g;

[0055] Emulsifier: sodium dodecylbenzenesulfonate, quality: 2.5g;

[0056] Initiator: potassium persulfate-sodium thiosulfate initiation system, mass: 0.4g;

[0057] Water: 139g;

[0058] Latent crosslinking agent: hydroxyethyl acrylate, mass: 0.45g;

[0059] Concrete preparation process is as follows:

[0060] Dissolve 46g of acrylamide, methacrylic acid, and 2-acrylamide-2-methylpropanesulfonic acid in a mass ratio of 14:3:3 in 139g of water. After fully dissolving , with a mass fraction of 20% to 40% sodium hydroxide aqueous solution to adjust the pH value of the solution to 8-10...

Embodiment 3

[0064] In this embodiment, the raw material composition and the quality of each component of the acrylamide polymer thickener are as follows:

[0065] Hydrophilic acrylic monomer: It is composed of acrylamide, methacrylic acid and 2-acrylamide-2-methylpropanesulfonic acid in a mass ratio of 14:2:2.

[0066] Mass: 48g;

[0067] Hydrophobic acrylic monomer: long carbon chain alkyl dimethyl allyl ammonium chloride, mass: 9g;

[0068] Emulsifier: sodium dodecylbenzenesulfonate, mass: 2.4g;

[0069] Initiator: potassium persulfate-sodium thiosulfate initiation system, mass: 0.5g;

[0070] Water: 140.1g;

[0071] Latent crosslinking agent: hydroxyethyl methacrylate, mass: 0.57g;

[0072] Concrete preparation process is as follows:

[0073] Dissolve 48g of acrylamide, methacrylic acid and 2-acrylamide-2-methylpropanesulfonic acid in a mass ratio of 14:2:2 in 140.1g of water, and fully dissolve Finally, the pH value of the solution is adjusted to 8-10 with a mass fraction of 20%...

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Abstract

The invention provides an acrylamide polymer thickener and a preparation method thereof, and a fracturing fluid, wherein the acrylamide polymer thickener is composed of the components by the mass percentage: 20%-45% of a hydrophilic propenyl monomer, 4%-6% of a hydrophobic propenyl monomer, 1%-2% of an emulsifier, 0.2%-0.5% of an initiator, a latent crosslinking agent and the balance water, wherein the latent crosslinking agent accounts for 0.5%-1.8% of the total mass of the hydrophilic propenyl monomer and the hydrophobic propenyl monomer; the acrylamide polymer thickener provided by the invention solves the technical problems in the prior art that a polymer thickener has poor temperature resistance and salt tolerance and poor shearing stability, and the prepared acrylamide polymer thickener has high-temperature performance, and can effectively meet the requirements of on-site construction of slick water fracturing.

Description

technical field [0001] The invention relates to the technical field of oilfield additives, in particular to an acrylamide polymer thickener, a preparation method thereof and a fracturing fluid. Background technique [0002] Fracturing fluids include water-based fracturing fluids, oil-based fracturing fluids, foam fracturing fluids, and emulsified fracturing fluids. The water-based fracturing fluids that use natural vegetable gum, cellulose, and synthetic polymers as thickeners are the most commonly used at home and abroad. The acrylamide polymer thickener is the main additive in the water-based fracturing fluid, and the acrylamide polymer thickener has a great influence on the performance and fracturing effect of the fracturing fluid. [0003] At present, there are many kinds of acrylamide polymer thickeners, among which the thickeners of guar gum and its derivatives are the most widely used, but there are common problems such as incomplete gel breaking, easy gel return, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/06C08F220/58C08F220/18C08F220/28C08F2/26C09K8/68
Inventor 李楷李忠兴慕立俊赵振峰李宪文张矿生薛小佳吴江吕海燕刘锦范华波徐创朝郭钢
Owner PETROCHINA CO LTD
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