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Fracturing fluid thickener and its preparation method and fracturing fluid

A fracturing fluid thickener and fracturing fluid technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of the easy corruption of guar gum and its modified products, high cost and feasible reuse In order to meet the requirements of fracturing operation, low cost and good flowback effect

Active Publication Date: 2018-10-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a fracturing fluid thickener, which solves the problem of returning back after breaking the gel due to the easy corruption of guar gum and its modified products in the prior art when guar gum and its modified products are used as the thickener of the fracturing fluid. The technical problems of drainage treatment are difficult, high cost, and poor feasibility of reuse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this embodiment, the raw material composition and the quality of each component of the fracturing fluid thickener are as follows:

[0035] Acrylic acid: 18.01g;

[0036] Acrylamide: 70.37g;

[0037] Nonylphenol polyoxyethylene ether acrylate: 6.26g;

[0038] N, N-dimethyl-hexyl tertiary amine: 1.20g;

[0039] Fluoropropylene oxide: 0.75g

[0040] Initiator: 0.40g;

[0041] Water: 386.36g;

[0042] Initiator is made up of ammonium persulfate and potassium thiosulfate, and the quality of ammonium persulfate and potassium thiosulfate is respectively:

[0043] Ammonium persulfate: 0.21g;

[0044] Potassium thiosulfate: 0.19 g.

[0045] Concrete preparation process is as follows:

[0046] Dissolve 18.01g of acrylic acid in 386.36g of water, adjust the pH to 7 with potassium hydroxide, and keep the constant temperature water bath at 15°C;

[0047] Under the condition of continuous nitrogen flow, add 70.37g of acrylamide and 6.26g of nonylphenol polyoxyethylene eth...

Embodiment 2

[0052] In this embodiment, the raw material composition and the quality of each component of the fracturing fluid thickener are as follows:

[0053] Acrylic acid: 18.01g;

[0054] Acrylamide: 70.37g;

[0055] Octylphenol polyoxyethylene ether acrylate: 6.40g;

[0056] N, N-dimethyl-octyl tertiary amine: 1.46g;

[0057] Chloropropylene oxide: 0.92g

[0058] Initiator: 0.25g;

[0059] Water: 388.64g;

[0060] Initiator is made up of ammonium persulfate and potassium thiosulfate, and the quality of ammonium persulfate and potassium thiosulfate is respectively:

[0061] Ammonium persulfate: 0.136g;

[0062] Potassium thiosulfate: 0.114g.

[0063] Concrete preparation process is as follows:

[0064] Dissolve 18.01g of acrylic acid in 388.64g of water, adjust the pH to 7 with potassium hydroxide, and keep the constant temperature water bath at 15°C;

[0065] Under the condition of continuous nitrogen flow, add 70.37g of acrylamide and 6.40g of octylphenol polyoxyethylene et...

Embodiment 3

[0070] In this embodiment, the raw material composition and the quality of each component of the fracturing fluid thickener are as follows:

[0071] Crotonic acid: 21.52g;

[0072] Acrylamide: 70.37g;

[0073] Dodecylphenol polyoxyethylene ether acrylate: 6.68g;

[0074] N, N-dimethyl-dodecyl tertiary amine: 1.86g;

[0075] Chloropropylene oxide: 0.92g;

[0076] Initiator: 0.40g;

[0077] Water: 304.05g;

[0078] Initiator is made up of ammonium persulfate and potassium thiosulfate, and the quality of ammonium persulfate and potassium thiosulfate is respectively:

[0079] Ammonium persulfate: 0.21g;

[0080] Potassium thiosulfate: 0.19 g.

[0081] Concrete preparation process is as follows:

[0082] Dissolve 21.52g of crotonic acid in 304.05g of water, adjust the pH to 7 with potassium hydroxide, and keep the constant temperature water bath at 15°C;

[0083] Under the condition of continuous nitrogen flow, add 70.37g of acrylamide and 6.68g of dodecylphenol polyoxyeth...

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Abstract

The invention provides a fracturing fluid thickener, a preparation method and a fracturing fluid. The fracturing fluid thickener comprises acrylamide, unsaturated carboxylic acid, alkylphenol polyoxyalkylene ether unsaturated acid ester, N,N-dimethyl-alkyl tertiary amine, halogenated cyclic ether, an initiator and water, wherein the sum of the mass percentages of acrylamide, unsaturated carboxylic acid, alkylphenol polyoxyalkylene ether unsaturated acid ester, N,N-dimethyl-alkyl tertiary amine and halogenated cyclic ether is 15-25%, and the mass percentage of the initiator is 0.04-0.09%. The fracturing fluid thickener solves the technical problems of large flown back fluid treatment difficulty, high cost and poor reuse feasibility after gum breaking caused by easy corrosion of guar gum and modification products thereof used as fracturing fluid thickeners in the prior art.

Description

technical field [0001] The invention relates to the technical field of oil and gas field additives, in particular to a fracturing fluid thickener for carrying sand and low-friction slippery water in the whole process, a preparation method thereof and a fracturing fluid. Background technique [0002] Fracturing is one of the main production stimulation measures for low-permeability oil and gas reservoirs. It is a method that uses hydraulic action to form cracks in oil and gas layers, also known as oil and gas layer hydraulic fracturing. The oil and gas layer fracturing process uses fracturing vehicles to High-pressure, large-displacement liquid with a certain viscosity is squeezed into the oil-gas layer. After the oil-gas layer is pressed out of many cracks, proppant (such as quartz sand, etc.) water well) or oil production (oil well), during the fracturing process, the liquid injected into the well is called fracturing fluid, and fracturing fluid is an important part of frac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68
Inventor 李宁军赵振峰李宪文丁里张燕明李小玲孟磊石华强吕小明祖凯肖元相王亚娟胡阳明马新星
Owner PETROCHINA CO LTD
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