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Updated: Jan 12, 2026

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Progress on Emulsification, Viscosity, Phase Inversion Characteristics, and Prediction Methods of Crude Oil-Water

Haijun Luo1, Yuzhang Jia1, Yongrui Lu1

  • 1School of Petroleum Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China.

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|November 3, 2025
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Summary
This summary is machine-generated.

This research reviews crude oil-water emulsions, detailing how internal factors like asphaltenes and external factors like temperature affect viscosity and phase inversion. Understanding these properties is crucial for optimizing oilfield production and pipeline transport.

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Area of Science:

  • Petroleum Engineering
  • Colloid and Surface Science

Background:

  • Oil and water mixtures in pipelines form emulsions due to shear forces.
  • These emulsions increase mixture viscosity, impacting flow characteristics and pressure drop.
  • Emulsion properties depend on internal factors (crude oil properties, surfactants) and external factors (shear, water content, temperature).

Purpose of the Study:

  • To review research progress on emulsification, viscosity, phase inversion, and prediction methods for crude oil-water systems.
  • To highlight the significance of phase inversion point for oilfield operations.
  • To identify future research directions for enhanced understanding and application.

Main Methods:

  • Literature review of research on crude oil-water mixed systems.
  • Analysis of internal factors (crude oil physical properties, natural surfactants like asphaltenes) influencing emulsion stability.
  • Examination of external factors (shear force, water content, temperature) affecting emulsification and viscosity.

Main Results:

  • Internal factors influence interfacial tension, film strength, particle distribution, and electric double-layer status, affecting emulsion stability.
  • External factors dynamically regulate emulsification degree and viscosity.
  • The phase inversion point is a critical parameter for oilfield production and transportation.

Conclusions:

  • Future research should investigate aqueous phase properties' impact on emulsification.
  • A unified viscosity prediction model for stable and unstable systems is needed.
  • Big data technology can improve the universality and applicability of research findings for oilfield development.