2008
DOI: 10.1080/10916460701429084 View full text |Buy / Rent full text
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Abstract: 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 interact… Show more

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“…recently proposed a delumping procedure based on a reduction method (Nichita and Minescu, 2004) that is analytical and consistent (in the sense of Leibovici, 1993) and accurately takes into account non-zero BIPs. This delumping procedure was successfully applied to multiphase flashes , various processes involving significant compositional variations (Nichita et al, 2007), water-hydrocarbon systems (Nichita, Broseta et al, 2008), and wax precipitation (Nichita, Pauly et al, 2008). If the results of a flash on the lumped mixture are available, the key element of any delumping procedure is the equation that relates the K values of the detailed mixture to the available information from the flash of the lumped mixture.…”
Section: The Delumping Proceduresmentioning
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“…recently proposed a delumping procedure based on a reduction method (Nichita and Minescu, 2004) that is analytical and consistent (in the sense of Leibovici, 1993) and accurately takes into account non-zero BIPs. This delumping procedure was successfully applied to multiphase flashes , various processes involving significant compositional variations (Nichita et al, 2007), water-hydrocarbon systems (Nichita, Broseta et al, 2008), and wax precipitation (Nichita, Pauly et al, 2008). If the results of a flash on the lumped mixture are available, the key element of any delumping procedure is the equation that relates the K values of the detailed mixture to the available information from the flash of the lumped mixture.…”
Section: The Delumping Proceduresmentioning
“…It was later successfully used for modeling phase equilibrium of light gas þ brine systems for reservoir and geochemical studies (e.g. Nichita et al, 2008;Plennevaux et al, 2013;Qiao et al, 2016;Wei and Zhang 2013;Yan et al, 2011).…”
Section: Equation Of State Calibration 41 Model Backgroundmentioning
“…The new three pseudo-component approach was also used to calculate the three-phase equilibrium in a gaseous hydrocarbon fluid. The composition (in moles) of a real reservoir fluid described by 18 components (Nichita et al 2008) and component properties are given in Table 4. The results of optimum values of pseudo-component properties are listed in Table 5.…”
Section: Case-studymentioning