Determination dans le domaine haute pression des proprietes thermophysiques d'une coupe lourde en dilution dans de l'hexane

摘要

Measurements of ultrasonic wave velocity were performed on three ternary or quaternary synthetic systems with the use of a pulse method in order to acquire different thermophysical properties such as density, compressibility coefficients, and specific heat ratio, over a wide range of pressures (0.1 - 150 MPa) and temperatures (293 - 373 K). The first system, which simulates a heavy distillation cut, is made up of C_(17) substances (40 alkane, 35 naphthene, and 25 aromatic compounds) so as to correspond to the average compositions observed in reservoir fluids. The other two systems are composed of 20 and 40 of this system in dilution with hexane.