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Clean fracturing fluid applicable to construction in low-temperature environment and preparation method thereof

A technology for clean fracturing fluid and low-temperature environment, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of increasing fracturing construction costs, increasing construction risks, and failing to meet the needs of fracturing reconstruction, etc. Achieve the effect of low cost, small damage and excellent performance

Inactive Publication Date: 2014-08-13
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology solves the problem of fracturing fluid viscosity affected by low water temperature, it increases the cost of fracturing construction and increases the risk of construction. Obviously, it cannot meet the needs of large-area production wells for fracturing in winter , there is no domestic research report on this aspect

Method used

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  • Clean fracturing fluid applicable to construction in low-temperature environment and preparation method thereof
  • Clean fracturing fluid applicable to construction in low-temperature environment and preparation method thereof
  • Clean fracturing fluid applicable to construction in low-temperature environment and preparation method thereof

Examples

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Embodiment 1

[0017] The clean fracturing fluid suitable for construction in a low temperature environment in this embodiment is made by mixing the fracturing fluid main agent, KCl and water and stirring evenly, wherein the mass of the fracturing fluid main agent accounts for 1.5% of the clean fracturing fluid mass , the quality of KCl accounts for 0.5% of the clean fracturing fluid mass; the main agent of the fracturing fluid is made of the following raw materials in mass percentage: 50% of alkyl dihydroxyethyl methyl ammonium chloride, 3% of micellar accelerator , 20% organic solvent, 0.5% complexing agent, 1% pH regulator, 1% micelle stabilizer, and the balance is water; the alkyl dihydroxyethyl methyl ammonium chloride is C 10 Alkyl dihydroxyethyl methyl ammonium chloride, the complexing agent is EDTA, the micelle accelerator is o-hydroxybenzoic acid, the organic solvent is ethylene glycol, and the pH regulator is sodium carbonate, The micelle stabilizer is cocamidopropyl hydroxysultain...

Embodiment 2

[0022] The clean fracturing fluid suitable for construction in a low temperature environment in this embodiment is made by mixing the fracturing fluid main agent, KCl and water and stirring evenly, wherein the mass of the fracturing fluid main agent accounts for 1% of the clean fracturing fluid mass , the quality of KCl accounts for 0.5% of the clean fracturing fluid mass; the main agent of the fracturing fluid is made of the following raw materials in mass percentage: 70% of alkyl dihydroxyethyl methyl ammonium chloride, 5% of micellar accelerator , 10% organic solvent, 0.1% complexing agent, 0.1% pH regulator, 8% micelle stabilizer, and the balance is water; the alkyl dihydroxyethyl methyl ammonium chloride is C 12 Alkyl dihydroxyethyl methyl ammonium chloride, the complexing agent is triethanolamine, the micelle accelerator is sodium o-hydroxybenzoate, the organic solvent is propylene glycol, and the pH regulator is sodium carbonate, so The micelle stabilizer is lauryl amid...

Embodiment 3

[0027] The clean fracturing fluid suitable for construction in a low temperature environment in this embodiment is made by mixing the fracturing fluid main agent, KCl and water and stirring evenly, wherein the quality of the fracturing fluid main agent accounts for 4% of the clean fracturing fluid mass , the quality of KCl accounts for 2% of the clean fracturing fluid quality; the main agent of the fracturing fluid is made of the following raw materials in mass percentage: 60% of alkyl dihydroxyethyl methyl ammonium chloride, 3.5% of micellar accelerator , 15% organic solvent, 5% complexing agent, 4% pH regulator, 6% micelle stabilizer, and the balance is water; the alkyl dihydroxyethyl methyl ammonium chloride is C 16 Alkyl dihydroxyethyl methyl ammonium chloride, the complexing agent is EDTA, the micelle accelerator is sulfobenzoic acid, and the organic solvent is ethylene glycol and propylene glycol (mass ratio 2:1), The pH regulator is sodium carbonate, and the micelle sta...

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Abstract

The invention discloses a clean fracturing fluid applicable to construction in a low-temperature environment. The clean fracturing fluid is prepared by mixing a fracturing fluid host, KCl and water together and stirring evenly, wherein the weight of the fracturing fluid host accounts for 1%-4% of the weight of the clean fracturing fluid and the weight of the KCl accounts for 0.5%-2% of the weight of the clean fracturing fluid; the fracturing fluid host is prepared from the following raw materials in percentage by weight: 50%-70% of alkyl diethylol dimethyl ammonium chloride, 3%-5% of micelle accelerant, 10%-20% of organic solvent, 0.1%-5% of complexing agent, 0.1%-4% of pH regulator, 1%-8% of micelle stabilizer and the balance of water. The invention also discloses a preparation method of the fracturing liquid. The fracturing liquid is low in cost, low in harm and excellent in performance, belongs to a micromolecular viscous-elastic surfactant system, and is applicable to fracturing construction in the low-temperature environment of 1-15 DEG C in winter; and in the use process, the fracturing liquid does not need to be added with a gel breaker.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a clean fracturing fluid suitable for construction in a low-temperature environment and a preparation method thereof. Background technique [0002] Fracturing is one of the main measures to increase and stabilize production in oil and gas fields. The fracturing fluid is the working fluid for creating fractures and carrying sand during the fracturing process, and its performance affects the efficiency of fracturing operations. Currently, fracturing fluids are divided into water-based, oil-based, emulsified and foam fracturing fluids. Due to temperature reasons, generally fracturing operations are basically stopped in winter, but under special circumstances, some production wells still need to be fracturing. In recent years, clean fracturing fluid has been popular in the field for its advantages of no residue, low damage, fast gel breaking at low tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/602C09K8/665C09K8/68
Inventor 王满学
Owner XI'AN PETROLEUM UNIVERSITY
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