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Recoverable biological composite emulsion fracturing fluid and preparation method and utilization method

A composite emulsion and hydraulic technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of poor temperature resistance, low flowback rate, obvious performance difference, etc., and achieve wide temperature range and good flow Strong performance and high temperature resistance

Inactive Publication Date: 2019-05-10
四川申和新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are various types of bio-glue fracturing fluids on the market, with obvious performance differences. Under normal circumstances, the flowback rate is low, and the water quality requirements for dosing liquid are high, so it is difficult to use the flowback liquid to continue dosing
The closest patents to the present invention are bioclean recyclable fracturing fluid thickener (Patent No.: CN103436246A) and a biorecyclable bio-glue oil well fracturing fluid and its preparation method (Patent No.: CN105586026A). The fracturing fluid system in the patent mentioned in the article requires many kinds of additives, large dosage, and has defects such as poor temperature resistance

Method used

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  • Recoverable biological composite emulsion fracturing fluid and preparation method and utilization method
  • Recoverable biological composite emulsion fracturing fluid and preparation method and utilization method
  • Recoverable biological composite emulsion fracturing fluid and preparation method and utilization method

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preparation example Construction

[0028] A method for preparing a recyclable biocomposite emulsion fracturing fluid, comprising the steps of:

[0029] A. Prepare mixed solution: mix acrylate, acrylamide and alkylacrylamide with water to obtain mixed solution;

[0030] B. Preparation of reaction solution: after mixing the mixed solution and methylenebisacrylamide, adding an initiator, and reacting at a constant temperature to obtain a reaction solution;

[0031] C. Preparation of composite emulsion fracturing fluid: add emulsifier, 18% sodium 2-methylpropanesulfonate solution, EDTA, quaternary ammonium salt cationic monomer and fluorine-containing polyfunctional acrylate to the reaction solution , after stirring and reacting, a complex emulsion fracturing fluid is obtained.

[0032] Further, the constant temperature in the step B is 65-70°C, and the reaction time is 1-2h.

[0033] Further, the stirring temperature in step C is 50-55°C; the stirring time is 2-2.5h.

[0034] Further, the method for preparing a...

Embodiment 1

[0038]A recyclable biocomposite emulsion fracturing fluid is composed of the following raw materials in weight percentage: acrylate 6%, acrylamide 3%, alkylacrylamide 8%, emulsifier 15%, mass fraction 18% of 2- Sodium methyl propane sulfonate solution 4%, initiator 0.2%, methylenebisacrylamide 5%, EDTA 2%, quaternary ammonium salt cationic monomer 2%, fluorine-containing polyfunctional acrylate 0.2% and the balance of water .

Embodiment 2

[0040] A recyclable biocomposite emulsion fracturing fluid is composed of the following raw materials in weight percent: 12% sodium acrylate, 8% acrylamide, 15% alkylacrylamide, 30% span80 emulsifier, and 18% of 2 -Sodium methyl propane sulfonate solution 8%, potassium persulfate 0.7%, methylenebisacrylamide 10%, EDTA 5%, quaternary ammonium salt cationic monomer 5%, fluorine-containing polyfunctional acrylate 0.8% and the balance of water.

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Abstract

The invention belongs to the technical field of fracturing fluid preparation and discloses recoverable biological composite emulsion fracturing fluid and a preparation method and a utilization method.The fracturing fluid is prepared from, by weight, 6%-12% of acrylate, 3%-8% of acrylamide, 8%-15% of alkyl acrylamide, 15%-30% of an emulsifying agent, 4%-8% of 2-sodium propanesulfonate in mass fraction of 18%, 0.2%-0.7% of an initiator, 5%-10% of methylene bisacrylamide, 2%-5% of EDTA, 2%-5% of quaternary ammonium salt cationic monomers, 0.2%-0.8% of fluorine-containing polyfunctional acrylic ester and the balance water. The preparation method includes steps: A, mixed liquid preparation; B, reaction liquid preparation; C composite emulsion fracturing fluid preparation. The utilization method includes a step of adjusting a mixing weight ratio of the composite emulsion fracturing fluid to water according to a reservoir temperature to prepare working solution. The recoverable biological composite emulsion fracturing fluid has advantages of wide adaptive temperature range and high temperature resistance.

Description

technical field [0001] The invention belongs to the technical field of fracturing fluid preparation, and in particular relates to a recyclable biocomposite emulsion fracturing fluid, a preparation method and a use method. Background technique [0002] The process of oil layer hydraulic fracturing is to use high-pressure and large-displacement pumps on the ground, and use the principle of liquid pressure transmission to send a liquid with a certain viscosity (usually called fracturing fluid) to the oil layer with a pressure greater than the absorption capacity of the oil layer. Injection, and make the pressure in the wellbore gradually increase, so as to suppress the high pressure at the bottom of the well, when the pressure is greater than the ground stress near the well wall and the tensile strength of the formation rock, fractures will be generated in the formation near the bottom of the well; continue to inject Sand-carrying fluid with proppant, the fracture extends forwa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C09K8/88
Inventor 贾振福邹旭辉王愉
Owner 四川申和新材料科技有限公司
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