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Fracturing fluid and its preparation method and application

A fracturing fluid and unsaturated technology, which is applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problems of high cost, difficult treatment of flowback fluid, poor reusability, etc., and achieve Low cost, good flowback effect, fast sticking effect

Active Publication Date: 2018-12-28
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, which solves the difficult and costly treatment of the flowback fluid caused by the fracturing fluid using guar gum and its modified products as the thickening agent in the prior art, and the technology of poor reuse feasibility problems, and the fracturing fluid can relieve environmental fracturing and meet the requirements of "factory" fracturing operations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this embodiment, the raw material composition and the quality of each component of the fracturing fluid are as follows:

[0033] Trimethylhydroxypropyl ammonium chloride: 3.5g;

[0034] Lauryl sulfate: 3g;

[0035] Thickener: 1g;

[0036] Water: 992.5g;

[0037] Concrete preparation process is as follows:

[0038] Under stirring, dissolve 3.5g of trimethylhydroxypropylammonium chloride and 3g of dodecyl sulfate in 992.5g of water, stir for 3-5min, then slowly add 1g of thickener, and stir for another 10-15min. The fracturing fluid of the present invention can be obtained, wherein the thickener consists of acrylamide, propylene carboxylic acid, nonylphenol polyoxyethylene ether acrylate, N, N-dimethyl-hexyl tertiary amine, fluoropropylene oxide according to The molar ratio is 99:25:1:1:1.

[0039] The fracturing fluid prepared in Example 1 was used as the drag-reducing agent and tested to obtain various performance parameters of the fracturing fluid: viscosity: 9...

Embodiment 2

[0042] In this embodiment, the raw material composition and the quality of each component of the fracturing fluid are as follows:

[0043] Trimethylhydroxypropyl ammonium bromide: 3.5g;

[0044] Lauryl sulfate: 3g;

[0045] Thickener: 2g;

[0046] Water: 991.5g;

[0047] Concrete preparation process is as follows:

[0048]Under stirring, dissolve 3.5g of trimethylhydroxypropylammonium bromide and 3g of dodecyl sulfate in 991.5g of water, stir for 3-5min, then slowly add 2g of thickener, and stir for another 10-15min. The fracturing fluid of the present invention can be obtained, wherein the thickener consists of acrylamide, crotonic acid, nonylphenol polyoxypropylene ether crotonate, N,N-dimethyl-nonyl tertiary amine, chlorinated ring Oxypropane is produced according to the molar ratio of 99:25:1:1:1.

[0049] The fracturing fluid prepared in Example 2 was used as the sand-carrying fluid and tested to obtain various performance parameters of the fracturing fluid: viscosit...

Embodiment 3

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

[0053] Trimethylhydroxypropyl ammonium bromide: 3.5g;

[0054] Dodecylsulfonate: 3g;

[0055] Thickener: 3g;

[0056] Water: 990.5g;

[0057] Concrete preparation process is as follows:

[0058] Under stirring, dissolve 3.5g of trimethylhydroxypropylammonium bromide and 3g of dodecylsulfonate in 990.5g of water, stir for 3-5min, then slowly add 3g of thickener, and stir for another 10-15min , the fracturing fluid of the present invention can be obtained, wherein the thickener consists of acrylamide, acrylic acid, octylphenol polyoxyethylene ether acrylate, N, N-dimethyl-decyl tertiary amine, bromopropylene oxide according to The molar ratio is 99:25:1:1:1.

[0059] The fracturing fluid prepared in Example 3 was used as the sand-carrying fluid and tested to obtain various performance parameters of the fracturing fluid: viscosity: 33-36mPa.s; m...

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Abstract

The invention provides a fracturing fluid, and a preparation method and an application thereof. The fracturing fluid comprises, by mass, 0.10-0.45% of a thickener, 0.35-0.55% of a clay stabilizer, 0.3-0.5% of a surfactant, and the balance of water, wherein the thickener is prepared through a reaction of acrylamide, unsaturated carboxylic acid, alkylphenol polyoxyalkylene ether unsaturated acid ester, N,N-dimethyl-alkyl tertiary amine and halogenated cyclic ether according to a molar ratio of 99:25:1:1:1. The fracturing fluid solves the technical problems of large flown back fluid treatment difficulty, high cost and poor reuse feasibility of fracturing fluids adopting guar gum and modification products thereof as a thickener 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 carrying sand and low-friction slippery water in the whole process and its preparation method and application. Background technique [0002] Hydraulic fracturing of oil and gas layers, referred to as oil and gas layer fracturing or fracturing, is a process technology to modify the seepage characteristics of oil and gas layers, and is an important technological measure for oil and gas wells to increase production and water injection wells. The surface high-pressure pump set injects high-viscosity liquid into the well with a displacement exceeding the absorption capacity of the formation, and then forms a high pressure near the bottom of the well. After the pressure exceeds the stress of the formation near the bottom of the well and the tensile strength of the rock, cracks are formed in the formation. The liquid with proppant is injected into ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68E21B43/26
Inventor 李宁军赵振峰李宪文丁里来轩昂李小玲孟磊石华强吕小明祖凯沈磊何明舫刘晓瑞马占国
Owner PETROCHINA CO LTD
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