Pseudo-component Delumping for Multiphase Equilibrium in Hydrocarbon-Water Mixtures

Pseudo-component Delumping for Multiphase Equilibrium in Hydrocarbon-Water Mixtures

An analytical and consistent delumping procedure is implemented for fluids of petroleum interest containing water, non-hydrocarbon gases (such as N 2 , CO 2 , and H 2 S) and hydrocarbon (HC) compounds. Two sorts of difficulties are associated with these fluids: they often exhibit three or more equil...

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Bibliographic Details
Published in:Petroleum science and technology Vol. 26; no. 17; pp. 2058 - 2077
Main Authors: Nichita, D. V., Broseta, D., Elhorga, P., Montel, F.
Format: Journal Article
Language:English
Published: Colchester Taylor & Francis Group 01-01-2008
Taylor & Francis
Subjects:
Applied sciences
Carbon dioxide
Chemical Physics
Crude oil
Crude oil, natural gas and petroleum products
delumping
Energy
equation of state
Exact sciences and technology
Fluid dynamics
Fluid flow
Fluids
Fuels
hydrocarbon-water mixture
Interaction parameters
lumping
Mathematical analysis
Petroleum products, gas and fuels. Motor fuels, lubricants and asphalts
phase equilibrium
Phases
Physics
Processing of crude oil and oils from shales and tar sands. Processes. Equipment. Refinery and treatment units
pseudo-component
equation of state
Equations of state
Hydrocarbon
pseudo-component
Carbon dioxide
Hydrogen sulfides
lumping
delumping
Phase equilibrium
Petroleum
hydrocarbon-water mixture
phase equilibrium
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Description
Summary:An analytical and consistent delumping procedure is implemented for fluids of petroleum interest containing water, non-hydrocarbon gases (such as N 2 , CO 2 , and H 2 S) and hydrocarbon (HC) compounds. Two sorts of difficulties are associated with these fluids: they often exhibit three or more equilibrium phases, and their thermodynamics cannot be described by conventional cubic equations of state (EoS). In this work, the Søreide-Whitson modification of the Peng-Robinson EoS, in which different binary interaction parameters are used in the aqueous and non-aqueous phases, is used. The method is successfully tested on two cases in the two- and three-phase regions: one synthetic HC/N 2 /CO 2 /H 2 O fluid and a "real" water/reservoir fluid.
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ISSN:1091-6466
1532-2459
DOI:10.1080/10916460701429084