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A kind of inverse microemulsion thickener for online fracturing construction and preparation method thereof

A technology of inverse microemulsion and thickener, applied in chemical instruments and methods, drilling compositions, etc., to achieve the effect of wide dosage range, moderate price and stable finished product performance

Active Publication Date: 2020-08-18
四川奥赛德材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a continuous mixing and Inverse microemulsion thickener with excellent heat resistance, shear resistance and salt resistance for online construction

Method used

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  • A kind of inverse microemulsion thickener for online fracturing construction and preparation method thereof
  • A kind of inverse microemulsion thickener for online fracturing construction and preparation method thereof
  • A kind of inverse microemulsion thickener for online fracturing construction and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A method for preparing an inverse microemulsion thickener for online fracturing construction, the specific steps are as follows:

[0047] S1. Weigh each raw material component according to the following mass percentage: 14.5% acrylamide, 5.4% acrylic acid, 0.1% fumaric acid, 0.4% methyl methacrylate, dodecyl dimethyl allyl ammonium chloride 0.8%, pH regulator 6%, sodium acetate 2.5%, polyoxyethylene lauryl ether (Brij 30) 8%, triethanolamine 28%, potassium persulfate 0.07%, and the remaining components are deionized water.

[0048] S2, acrylic acid solution neutralization

[0049] Under stirring condition, enter 95% (reserve 5% to be used for dissolving initiator) of the deionized water that total system needs in batching tank, add pH regulator (mass ratio KOH:NaHCO 3 =2:1), stirred until completely dissolved, and then neutralized the acrylic acid added to the solution to obtain a neutralized product of acrylic acid containing sodium acrylate, and the pH value of the s...

Embodiment 2

[0059] A method for preparing an inverse microemulsion thickener for online fracturing construction, the specific steps of the preparation method are as follows:

[0060] S1. Weigh each raw material component according to the following mass percentage: 10.5% acrylamide, 8% acrylic acid, 0.03% citraconic acid, 0.5% ethyl methacrylate, 0.6% 2-acrylamide-2-methylpropanesulfonic acid , pH regulator NaOH 5%, solubilizer 3%, complex emulsifier 9%, isooctane 33%, benzoyl peroxide and N,N-dimethylaniline (mass ratio 1:1) 0.07%, the rest The component is deionized water;

[0061] S2, acrylic acid solution neutralization

[0062] Under stirring conditions, put 95% of the deionized water required by the total system into the batching tank (reserve 5% for dissolving the initiator), add the pH regulator NaOH, stir until completely dissolved, and then add The acrylic acid is neutralized to obtain a neutralized product of acrylic acid containing sodium acrylate, and the pH value of the sol...

Embodiment 3

[0072] A method for preparing an inverse microemulsion thickener for on-line fracturing construction, the specific steps of which are as follows:

[0073] S1. Weigh each raw material component according to the following mass percentage: 12.5% ​​of acrylamide, 8.3% of acrylic acid, 0.03% of maleic acid, 0.3% of functional monomer A, 0.55% of vinylphosphonic acid, 4.6% of pH regulator, chlorine Sodium chloride 2.2%, compound emulsifier 8.8%, cyclohexane 35%, potassium persulfate and sodium bisulfite (mass ratio 2:1) 0.05%, and the rest is deionized water.

[0074] S2, acrylic acid solution neutralization

[0075] Under stirring condition, enter 95% (reserving 5% to be used for dissolving initiator) of the deionized water that total system needs in batching tank, add pH value adjuster (mass ratio NaOH: NaOH 2 CO 3 =3:1), stirred until completely dissolved, and then added acrylic acid to the solution for neutralization reaction to obtain a neutralized product of acrylic acid con...

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Abstract

The invention discloses a reversed-phase microemulsion thickening agent applied to online fracturing construction. The reversed-phase microemulsion is prepared from the following ingredients in percentage by mass: 10.0 to 15.0% of acrylamide, 5.0 to 8.5% of acrylic acid, 0.02 to 0.15% of strong hydrophilic monomer, 0.1 to 0.5% of functional monomer A, 0.5 to 1.5% of functional monomer B, 3.0 to 8.0% of pH regulator, 2.0 to 3.0% of solubilizer, 7.0 to 9.0% of compound emulsifier, 20.0 to 35.0% of oil solvent, 0.05 to 0.07% of initiator and the balance of deionized water. A preparation method ofthe thickening agent comprises the following steps: firstly, dissolving the pH regulator, the acrylic acid, the solubilizer, the acrylamide, the strong hydrophilic monomer, the functional monomer A and the functional monomer B into the deionized water and stirring to prepare a reaction phase; evenly mixing the oil solvent and the compound emulsifier to obtain a continuous phase; adding the reaction phase into the continuous phase, stirring at high speed to prepare reversed-phase microemulsion and performing polymerization reaction under the action of the initiator to obtain the reversed-phasemicroemulsion thickening agent. The thickening agent disclosed by the invention not only achieves continuous mixture and online construction, but also has excellent temperature resistance, shear resistance and salt resistance.

Description

technical field [0001] The invention relates to the technical field of oil and gas reservoir stimulation, in particular to an inverse microemulsion thickener used in online fracturing construction and a preparation method thereof. Background technique [0002] Acrylamide copolymer is a typical and most widely studied water-soluble polymer. Due to its obvious "reverse polyelectrolyte effect" and wide range of pH values, it is widely used in environmental protection, oil exploration, etc. are increasingly being reused. According to reports, acrylamide multi-polymers have been used as fracturing fluid thickeners for decades. With the continuous R&D and innovation of developers, the production process of polymer thickeners has become more mature, and the product performance has also been continuously improved. Commonly used polymer thickeners are divided into powder thickeners and emulsion thickeners according to their properties. In terms of market applications, powder thicken...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/06C08F220/14C08F222/02C08F226/02C08F2/32C08F220/18C08F220/58C08F230/02C09K8/68C09K8/88
CPCC08F2/32C08F220/56C09K8/685C09K8/882C09K8/887C08F220/06C08F222/02C08F220/18C08F220/585
Inventor 刘通义陈光杰谭坤魏俊戴秀兰林波吴政
Owner 四川奥赛德材料科技有限公司
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