Calsep Websites


PVTsim is a versatile PVT simulation program developed for reservoir engineers, flow assurance specialists, PVT lab engineers and process engineers.

The PVT simulation package PVTsim is being used by leading oil producing and operating companies throughout the world.

Based on an extensive data material collected over a period of more than 25 years, PVTsim carries the information from experimental PVT studies into simulation software in a consistent manner and without losing valuable information on the way.

PVTsim allows reservoir engineers, flow assurance specialists and process engineers to combine reliable fluid characterization procedures with robust and efficient regression algorithms to match fluid properties and experimental data. The fluid parameters may be exported to produce high quality input data for reservoir, pipeline and process simulators.

PVTsim is petroleum phase behavior at the tip of your fingers.

What is New in PVTsim 21

The Eclipse Black Oil Module

Improved method for correcting for non-monotony.

Changed to accept non-monotonic saturated Rv's. Lines with non-monotonic undersaturated Rv's deleted

Consistency with Hysys

Extended with ability to get consistent densities using the PVTsim file reader without having to manually set up a GCEOS in Hysys.

Improved Slim Tube MMP Functionalities

Import Eclipse Compositional Files

Eclipse Comp text files with multiple compositions can now be imported and will automatically be saved as fluids.

Stars Interface

Interface to the Stars reservoir simulator from CMG.

Wax Open Structure

In addition to Flash and Hydrate Open Structure PVTsim 21 offers now Wax Open Structure library.