Investigation of Relationship of Interfacial Tension (IFT) And Velocity Dependent Relative Permeability (VDRP) To Liquid Saturation In Wellbores In Gas Condensate Reservoirs Under Dynamic Conditions

Abstract

The study aims to understand the effects of interfacial tension (IFT) and velocity dependent
relative permeability (VDRP) to gas production, especially once the wellbore pressure is below the dew
point under dynamic conditions beyond the conventional steady-state assumptions. The main impact of this
occurrence is liquid loading in the wellbore that may block the gas influx. The interfacial tension (IFT) and
velocity dependent relative permeability (VDRP) alteration along with the liquid filling will affect gas
production process. A realistic conceptual simulation model is developed by activating the IFT and VDRP
options in the base case. The analysis enables us to outline how critical the effects of both parameters to
liquid production. Firstly, the liquid drop-out from gas phase, then accumulation, while still immobile until
they establish a condensate banking and block a part of the wellbore region so that the gas cannot flow up to
the surface, resulting in impairment in well deliverability. This study uses three parameters of IFT, for
instance, IFT 1, IFT 5, and IFT 10 as well as activates the VDRP option for another parameter in the
scenarios. The scenario IFT 1 shows that liquid production increases up to 0.205%, scenario IFT 5 increases
up to 0.371%, and scenario IFT 10 increases up to 0.422%. Meanwhile, the VDRP option exhibits that liquid
production increase by up to 57.40%. The analysis indicates that liquid production significantly escalates
while the IFT is getting higher, and VDRP options display the liquid loading even more due to the effects of
IFT. The novelty of this study is the ability to analyze the dynamic condition of fluid behavior in the
wellbore compared to the steady-state condition that has been investigated by several authors in the
literature.