Multifunctional nanoemulsion drag reducer for shale gas fracturing and preparation method thereof

A nano-emulsion and multi-functional technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as high cost, heavy workload, and complicated operation, so as to reduce friction, improve utilization rate, and reduce construction cost. The effect of fees

Active Publication Date: 2021-03-05
BEIJING GEPETTO OIL TECH
View PDF7 Cites 2 Cited by
  • 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%; Sexual monomer, 10-20%; 2-phenoxyethyl acrylate, 3-5%; first emulsifier, 1-3%; second emulsifier, 1-3%; the rest is water; The first emulsifier includes one or more of Tween series 20, 40, 60, 80, 85; the second emulsifier includes OP-4, OP-10, OP-15, OP- One or more of 20; the base oil includes one or more of white oil, kerosene, coconut oil or cyclohexane

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multifunctional nanoemulsion drag reducer for shale gas fracturing and preparation method thereof
  • Multifunctional nanoemulsion drag reducer for shale gas fracturing and preparation method thereof
  • Multifunctional nanoemulsion drag reducer for shale gas fracturing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 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

[0021] 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

[0023] 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 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
surface tensionaaaaaaaaaa
resistance reduction rateaaaaaaaaaa
Login to view more

Abstract

The invention discloses a multifunctional nano-emulsion drag reducer for shale gas fracturing, which belongs to the technical field of oil and gas stimulation. The drag reducer is formed by reverse emulsion polymerization by combining a water phase solvent and an oil phase solvent, and the weight percentage of each component of the water phase solvent is: methacryloyloxyethyltrimethylammonium 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%; Water-soluble monomer, 10‑20%; 2‑ Phenoxyethyl acrylate, 3‑5%; primary emulsifier, 1‑3%; secondary emulsifier, 1‑3%; balance water. The present invention also provides a preparation method of the above-mentioned nanoemulsion drag reducer. The invention integrates multiple functions such as resistance reduction, sterilization, anti-expansion, and drainage assistance, can effectively reduce frictional resistance, has excellent sand-carrying performance, and has good effects of anti-expansion and drainage assistance.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap