Low liquid film multifunctional emulsion viscosifier and method of making same

CN122103444APending Publication Date: 2026-05-29CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA NAT PETROLEUM CORP
Filing Date
2024-11-28
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing emulsion-type fracturing fluids have insufficient temperature resistance and viscosity-increasing properties in high-temperature and high-salt environments, and the lack of drainage aids in field operations limits the drainage effect, affecting the seepage channels and environmental safety of oil and gas fields.

Method used

A low-liquid-film multifunctional emulsion thickener was prepared by selecting wetting reversal polymer monomers and micellar thickening control mechanisms. This thickener enhances the driving force for filtrate drainage and its resistance to temperature and salt, reduces the thickness of the core liquid film, and achieves the effects of assisting drainage and preventing swelling.

Benefits of technology

It significantly reduces the thickness of the core fluid film by 40%, improves the temperature and shear resistance viscosity, enhances the flowback rate, reduces the reservoir water-locking effect, and improves oil and gas field production and environmental friendliness.

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Abstract

The present application relates to fracturing fluid additive technical field, it is a kind of low liquid film multifunctional emulsion thickening agent and its preparation method, the former raw material is acrylamide, acrylic acid, 2-acrylamido-2-methylpropane sulfonic acid, ethylene oxide, wetting reverse type polymerization monomer, white oil, initiator, tackifying agent, emulsifier, styrene monomer and water according to mass fraction count.This application enhances the displacement driving force and emulsion temperature resistance and salt tolerance of filtrate loss liquid and part of broken glue liquid by selecting wetting reverse type polymerization monomer, significantly reduces the filtration of most gas field fracturing fluid, has multiple functions such as cleanup, anti-swelling, core liquid film thickness reduction, etc., has greater application value, on the other hand, micellar tackifying control mechanism is introduced, micellar controllable tackifying is realized, and it has irreplaceable effect in flowback fluid utilization and high temperature resistance.
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