INFLUENCE OF THE CRUDE OIL CHARACTERIZATION ON MMP CALCULATION J.-N. JAUBERT and L. ARRAS

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چکیده

Dans cet article, nous Žtudions lÕinfluence de la modŽlisation des coupes dÕun pŽtrole brut sur la valeur calculŽe de la pression minimale de miscibilitŽ (MMP). En particulier, il est expliquŽ quels types de constituants peuvent tre regroupŽs sous forme d'un peusdo-constituant sans pour autant dŽgrader la valeur de la MMP. La procŽdure suivie dans cet article est simple : ˆ partir dÕun pŽtrole brut donnŽ, nous utilisons dans un premier temps une reprŽsentation par 37 composants, exploitant lÕinformation analytique standard disponible sur ce fluide. La modŽlisation des fractions lourdes utilisŽe est celle dŽveloppŽe par AvaullŽe et al. (1997a), dans laquelle nous avons ajustŽ deux paramtres du rŽsidu de distillation C20+ sur les pressions de saturation expŽrimentales. Sur le fluide ŽtudiŽ, nous mettons en Žvidence le bon niveau de restitution des grandeurs volumŽtriques, des donnŽes expŽrimentales de gonflement ainsi que de la MMP mesurŽe lors d'une expŽrience de dŽplacement en tube mince. Dans un deuxime temps, les composŽs intermŽdiaires lourds, les intermŽdiaires moyens et les composants lŽgers font successivement lÕobjet de regroupement en pseudo-constituant. L'influence de tels regroupements sur la valeur calculŽe de la MMP est alors analysŽe.

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تاریخ انتشار 1999