Viscosity Matching
Viscosity is a measure of the resistance of a fluid to deform under shear stress and is fundamental in petroleum engineering modelling and simulation efforts. PVTP offers several viscosity modelling techniques delivering understanding of fluid viscosity behaviour from reservoir through the production path.
PVTP offers several viscosity matching models that capture the influences of thermal effects delivering accurate prediction of a given fluids viscous behaviour.
The viscosity models are based on reduced density and corresponding states theory providing full viscosity matching flexibility in context of the EOS characterization workflow.
The currently available viscosity matching models are as follows:
- Lohrenz Bray Clark - based on Jossi et al with reduced density written in terms of Vcs
- Pedersen et al - corresponding states model with methane as the reference substance
- Zhou et al - corresponding states model with nC14 as the reference substance
- Little Kennedy - correlation based on oil density, molecular weight, specific gravity and weight fraction of C7+
Thermal Conductivity
When a temperature gradient exists in a fluid, the fluid molecules will try to eliminate the temperature gradient by transferring energy from regions of higher temperature to regions of lower temperature.
Most techniques to calculate thermal conductivity of hydrocarbon mixtures are only applicable to mixtures with well-defined components or may only be used for gas or liquid phases.
PVTP offers a thermal conductivity calculation technique that is applicable to petroleum mixtures containing undefined heavy hydrocarbon fractions delivering consistent results for both gas and liquid phases.
