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Multifunctional nano emulsion drag reducer used for shale gas fracking

A nano-emulsion, multi-functional technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of complex operation, heavy workload, high cost, reduce construction costs, improve utilization, and reduce friction. Effect

Active Publication Date: 2018-04-27
BEIJING GEPETTO OIL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of complex on-site liquid preparation operation, heavy workload and high cost caused by the addition of drag reducers, bactericides, anti-swelling agents, and drainage aids to conventional slick water, the invention provides a shale The multifunctional nanoemulsion drag reducer for air fracturing is formed by reverse emulsion polymerization by combining a water phase solvent and an oil phase solvent. The weight percentage of each component of the water phase solvent is: methacryloyloxyethyltri Methyl ammonium chloride, 10-15%; inorganic salt, 1-3%; glycerol carbonate, 20-25%; the weight percentage of each component of the oil phase solvent is: base oil, 30-45%; Non-toxic monomer, 10-20%; 2-phenoxyethyl acrylate, 3-5%; first emulsifier, 1-3%; second emulsifier, 1-3%; the rest is water

Method used

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  • Multifunctional nano emulsion drag reducer used for shale gas fracking
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  • Multifunctional nano emulsion drag reducer used for shale gas fracking

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Weighing: 24g methacryloyloxyethyltrimethylammonium chloride, 40g glycerol carbonate, 2g potassium hydroxide, 80g coconut oil, 20g acrylic acid, 10g 2-phenoxyethyl acrylate, 4g Tween 80 , OP-10 2g, water 18g. Dissolve methacryloyloxyethyltrimethylammonium chloride, glycerol carbonate, and potassium hydroxide in water, mix well, and stir continuously to prepare a water phase solvent; coconut oil, acrylic acid, 2-phenoxyethyl Acrylic ester, Tween 80 and OP-10 are mixed evenly and stirred continuously to make an oil phase solvent. Add the oil phase solvent into a 250mL three-necked flask, place the three-necked flask in a constant temperature water bath at 30°C, and keep stirring; slowly drop the water phase solvent into the oil phase solvent to make it fully emulsified, and prepare a water-in-oil reaction solution phase emulsion base liquid; pass nitrogen gas into the reverse phase emulsion base liquid and stir at high speed to remove oxygen, after stirring for 20 minute...

Embodiment 2

[0024] Weighing: 20g of methacryloyloxyethyltrimethylammonium chloride, 44g of glycerol carbonate, 4g of sodium chloride, 60g of white oil, 30g of dimethyldiallylammonium chloride, 2-phenoxyethyl ammonium Acrylate 6g, Tween 20 2g, OP-4 4g, water 30g. Dissolve methacryloyloxyethyltrimethylammonium chloride, glycerol carbonate, and sodium chloride in water and mix evenly, and stir continuously to prepare a water phase solvent; white oil, dimethyl diallyl chloride Ammonium, 2-phenoxyethyl acrylate, Tween 20, and OP-4 were mixed evenly and continuously stirred to prepare an oil phase solvent. Add the oil phase solvent into a 250mL three-necked flask, place the three-necked flask in a constant temperature water bath at 20°C, and keep stirring; slowly drop the water phase solvent into the oil phase solvent to fully emulsify it, and prepare a water-in-oil reaction solution. phase emulsion base liquid; pass nitrogen into the reverse phase emulsion base liquid and stir at high speed t...

Embodiment 3

[0026] Weighing: 30g of methacryloxyethyltrimethylammonium chloride, 50g of glycerol carbonate, 6g of ammonium chloride, 60g of kerosene, 20g of acrylamide, 8g of 2-phenoxyethyl acrylate, 2g of Tween 40 , OP-15 3g, water 21g. Dissolve methacryloyloxyethyltrimethylammonium chloride, glycerol carbonate, and ammonium chloride in water and mix them uniformly to make a water phase solvent; mix kerosene, acrylamide, 2-phenoxyethyl Acrylic ester, Tween 40 and OP-15 are mixed evenly and stirred continuously to make an oil phase solvent. Add the oil phase solvent into a 250mL three-necked flask, place the three-necked flask in a constant temperature water bath at 40°C, and keep stirring; slowly drop the water phase solvent into the oil phase solvent to make it fully emulsified, and prepare a water-in-oil reaction solution phase emulsion base liquid; pass nitrogen into the reverse phase emulsion base liquid and stir at high speed to remove oxygen. After stirring for 40 minutes, drop 1 ...

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Abstract

The invention discloses a multifunctional nano emulsion drag reducer used for shale gas fracking, which belongs to the technical field of yield increase of petroleum and natural gas. The drag reduceris composed of a water-phase solvent and an oil-phase solvent through inverse emulsion polymerization, the water-phase solvent comprises the following components by weight percentage: 10-15% of methacryloyloxyethyl trimethyl ammonium chloride, 1-3% of inorganic salt, 20-25% of glycerol carbonate, the oil-phase solvent comprises the following components by weight percentage: 30-45% of base oil, 10-20% of a water-soluble monomer, 3-5% of 2-phenoxyethyl acrylate, 1-3% of a first emulsifier, 1-3% of a second emulsifier, and the balance of water. The invention also provides a preparation method ofthe multifunctional nano emulsion drag reducer. The multifunctional nano emulsion drag reducer integrates a plurality of functions of drag reduction, sterilization, swelling resistance, and dischargeaiding, can effectively reduce frictional resistance, and has advantages of excellent sand-carrying performance, and good swelling resistance and discharge aiding effects.

Description

technical field [0001] The invention relates to the technical field of increasing production of oil and natural gas, in particular to a multifunctional nanoemulsion drag reducer for shale gas fracturing and a preparation method thereof. Background technique [0002] Hydraulic fracturing has always been the most effective stimulation technology in the process of oil and gas reservoir exploitation. Conventional oil and gas well reservoir stimulation uses jelly fracturing fluid, while shale gas well reservoir stimulation requires special fracturing fluid, namely slick water fracturing liquid. Slippery water fracturing fluid is formulated from polymers or ultra-high molecular polymers, water, and additives. It has low viscosity and low friction properties, which can greatly reduce mining costs and obtain very high productivity, so slippery Water fracturing fluids are widely used and in great demand. However, there are a series of problems in drag reducing agents for slick wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/64C09K8/82C08F220/34C08F220/06C08F220/30C08F226/02C08F220/56C08F220/58C08F220/60C08F2/32C08F2/30
CPCC09K8/64C09K8/82C08F2/30C08F2/32C08F220/06C08F220/34C08F220/58C08F220/60C08F226/02C09K2208/28C09K2208/12C08F220/585C08F220/606C08F220/301C08F220/56
Inventor 徐太平曾斌周京伟
Owner BEIJING GEPETTO OIL TECH
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