Pressure drop and flow pattern of oil–water flow for low viscosity oils: Role of mixture viscosity

• A new correlation for oil–water flow mixture viscosity for low viscosity oils.
• This correlation showed good agreement with the experimental data from this study and from other reported works.
• Oil–water pressure drop behavior and flow pattern for low viscosity oils.
• The pressure drop and inversion point were investigated at different oil fraction.
• Pressure drop reduces as the oil fraction approaches inversion point.