Elastic sand-carrying fracturing fluid, thickening agent for fracturing fluid and preparation method of thickening agent

A technology of thickening agent and fracturing fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of large demand for surfactants, protection of unfavorable environment, high viscosity of base fluid, etc., and achieve construction effect Obvious, fast dissolution rate, low equipment requirements

Active Publication Date: 2018-10-16
四川申和新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the viscoelastic surfactant cleaning fracturing fluid described in patent CN106268496A has good temperature resistance and simple process, the viscosity of the base fluid and the viscosity after cross-linking are high, the pumping of equipment is difficult, and the requirements for construction equipment are high. Sulfonic acid group, this group is very polluting to the environment; the viscoelastic surfactant fracturing fluid described in patent CN103865511A is not resistant to temperature, is sensitive to temperature, the demand for surfactant is large, and the cost is expensive. The production cost of dialkylphthalein chloride is high, and the production process produces toxic hydrogen chloride gas, which is not conducive to environmental protection

Method used

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  • Elastic sand-carrying fracturing fluid, thickening agent for fracturing fluid and preparation method of thickening agent
  • Elastic sand-carrying fracturing fluid, thickening agent for fracturing fluid and preparation method of thickening agent
  • Elastic sand-carrying fracturing fluid, thickening agent for fracturing fluid and preparation method of thickening agent

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preparation example Construction

[0045] Its concrete preparation method is as follows:

[0046] 1. Preparation of thickener for elastic sand-carrying fracturing fluid

[0047] Dissolve analytically pure acrylamide in water, add octadecyltrimethylammonium bromide, potassium persulfate, and caustic soda under stirring, heat to 70°C, and then slowly add diethylene glycol distearate in sequence , tripolyglycerol diisostearate, sodium tetradecyl carboxylate, fatty acid amidopropyl dimethylamine, tertiary amino alcohol, fully reacted for 2 hours, passed nitrogen gas at 80°C to remove excess bromine to stop the reaction, and The obtained product is continuously passed through nitrogen to crystallize, and the crystallized product is dried and granulated to obtain the thickener.

[0048] 2. Preparation of elastic sand-carrying fracturing fluid

[0049] The preparation method in the laboratory of the elastic sand-carrying fracturing fluid provided by the invention is as follows:

[0050] In the laboratory, add water...

Embodiment 1

[0054] A thickener for elastic sand-carrying fracturing fluid, the preparation raw materials of the thickener include the following components in parts by weight: 0.5 part of acrylamide; 1 part of octadecyltrimethylammonium bromide; 0.05 parts of potassium persulfate; 0.005 parts of alkali; 1 part of diethylene glycol distearate; 0.5 parts of tripolyglycerol diisostearate; 0.2 parts of sodium tetradecyl carboxylate; 0.2 parts of amines; 0.2 parts of tertiary amino alcohols.

[0055] A preparation method for a thickener for elastic sand-carrying fracturing fluid, comprising the steps of:

[0056] A. Dissolve acrylamide in water to obtain an acrylamide solution:

[0057] B. In a stirring state, add octadecyltrimethylammonium bromide, potassium persulfate and caustic soda to the acrylamide solution and mix well to obtain an intermediate solution;

[0058] C. Add diethylene glycol distearate, triglyceryl diisostearate, sodium tetradecyl carboxylate, fatty acid amidopropyl dimeth...

Embodiment 2

[0063] A thickener for elastic sand-carrying fracturing fluid, the preparation raw materials of the thickener include the following components in parts by weight: 1.5 parts of acrylamide; 5 parts of octadecyltrimethylammonium bromide; 0.15 parts of potassium persulfate; 0.015 parts of alkali; 5 parts of diethylene glycol distearate; 1.5 parts of tripolyglycerol diisostearate; 0.8 parts of sodium tetradecyl carboxylate; 1.5 parts of amine; 0.8 parts of tertiary amino alcohol.

[0064] A preparation method for a thickener for elastic sand-carrying fracturing fluid, comprising the steps of:

[0065] A. Dissolve acrylamide in water to obtain an acrylamide solution:

[0066] B. In a stirring state, add octadecyltrimethylammonium bromide, potassium persulfate and caustic soda to the acrylamide solution and mix well to obtain an intermediate solution;

[0067] C. Add diethylene glycol distearate, triglyceryl diisostearate, sodium tetradecyl carboxylate, fatty acid amidopropyl dimet...

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Abstract

The invention belongs to the technical field of oilfield chemistry and fracturing stimulation and provides elastic sand-carrying fracturing fluid, a thickening agent for the fracturing fluid and a preparation method of the thickening agent. The thickening agent is prepared from, by weight, 0.5-1.5 parts of acrylamide, 1-5 parts of octadecy trimethyl ammonium bromide, 0.05-0.15 part of potassium peroxodisulfate, 0.005-0.015 part of alkali, 1-5 parts of diethylene glycol distearate, 0.5-1.5 parts of triglycerides diisostearate, 0.2-0.8 part of sodium tetradecyl carboxylate, 0.2-1.5 parts of fatty acid amide propyl dimethylamine and 0.2-0.8 part of tertiary amine alcohol; the elastic sand-carrying fracturing fluid is prepared from, by weight, 0.20-0.55% of the thickening agent, 0.20-0.55% ofa crosslinking agent, 0.1-0.5% of a discharge aiding agent, 0.1-0.5% of an antiswelling agent and the balance of water. The preparation method includes the steps of preparation of an acrylamide solution, an intermediate solution, crystal substances and the thickening agent. The elastic sand-carrying fracturing fluid is simple in fluid preparation, remarkable in construction effect and good in rheological property; when the thickening agent and the crosslinking agent are used together, low viscosity and high sand-carrying capacity are achieved.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemistry and fracturing stimulation, and in particular relates to an elastic sand-carrying fracturing fluid, a thickener used in the fracturing fluid and a preparation method thereof. Background technique [0002] At present, the prior art closest to the patent of the present invention is a gemini amphoteric viscoelastic surfactant and its preparation method and a clean fracturing fluid (patent number: CN106268496A) and viscoelastic surfactant using it as a thickening agent Fracturing fluid and its preparation method and application (patent number: CN103865511A). [0003] Although the viscoelastic surfactant cleaning fracturing fluid described in patent CN106268496A has good temperature resistance and simple process, the viscosity of the base fluid and the viscosity after cross-linking are high, the pumping of equipment is difficult, and the requirements for construction equipment are high. Sul...

Claims

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Application Information

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IPC IPC(8): C09K8/68
CPCC09K8/685C09K8/882C09K8/887
Inventor 王愉屈川秦鹏
Owner 四川申和新材料科技有限公司
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