INFLUENCE OF THE CRUDE OIL CHARACTERIZATION ON MMP CALCULATION J.-N. JAUBERT and L. ARRAS
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چکیده
Dans cet article, nous tudions lÕinfluence de la modlisation des coupes dÕun ptrole brut sur la valeur calcule de la pression minimale de miscibilit (MMP). En particulier, il est expliqu quels types de constituants peuvent tre regroups sous forme d'un peusdo-constituant sans pour autant dgrader la valeur de la MMP. La procdure suivie dans cet article est simple : partir dÕun ptrole brut donn, nous utilisons dans un premier temps une reprsentation par 37 composants, exploitant lÕinformation analytique standard disponible sur ce fluide. La modlisation des fractions lourdes utilise est celle dveloppe par Avaulle et al. (1997a), dans laquelle nous avons ajust deux paramtres du rsidu de distillation C20+ sur les pressions de saturation exprimentales. Sur le fluide tudi, nous mettons en vidence le bon niveau de restitution des grandeurs volumtriques, des donnes exprimentales de gonflement ainsi que de la MMP mesure lors d'une exprience de dplacement en tube mince. Dans un deuxime temps, les composs intermdiaires lourds, les intermdiaires moyens et les composants lgers font successivement lÕobjet de regroupement en pseudo-constituant. L'influence de tels regroupements sur la valeur calcule de la MMP est alors analyse.
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