News & Events
- January 11-15, 2009 PETROTECH 2009, New Delhi, India
- December 23, 2008 PVTsim 18 released
- July 15th, 2008 Flowasta 1.0 released
Hydrate
Calsep has more than 20 years of experience in modeling gas hydrates. This accumulated knowledge goes into all hydrate studies carried out by Calsep consultants. This extensive experience allows Calsep to accurately simulate hydrate formation conditions in gas, oil, and condensate mixtures. Hydrate inhibition by salts and liquid inhibitors as well as loss of inhibitor to hydrocarbon phases are accurately accounted for.
Calsep undertakes evaluations of the hydrate potential for whole pipeline systems, taking into account the pressure drop and heat exchange with the surroundings. The hydrate potential can be evaluated under normal operation, shutdown, and start-up.
Hydrate Model
The hydrate model was developed and published by Calsep in the late 1980's. Calsep has further published a number of papers about the loss of hydrate inhibitor to hydrocarbon phases. All publications appear in peer-reviewed journals - a hallmark of all Calsep models.
The hydrate model accounts for hydrate structures I, II and H as well as hydrocarbon and aqueous phases, solid salt phases, and ice. Calsep has verified the hydrate model using all published experimental data, including data with up to 50 weight percent liquid inhibitor and saturated salt solutions.
Hydrate Kinetics in Flow-lines
Hydrate growth kinetics in multiphase flow lines is the most recent extension of the consulting services provided by Calsep.
The applied hydrate kinetics model is based on two Calsep Ph.D. projects from the 1990's. It is rigorous and fully compositional. Calsep has implemented the hydrate kinetics model in a pipeline flow simulator that accounts for the effects of pressure drop, heat exchange, hydrate formation heat, slurry viscosity and flow patterns on the hydrate growth rate.
