Sj. Ashcroft et al., HIGH-PRESSURE PVT MEASUREMENTS ON SEPARATOR CRUDE-OIL CARBON-DIOXIDE MIXTURES, Chemical engineering research & design, 72(A2), 1994, pp. 156-162
Apparatus for the measurement of PVT properties and bubble points of p
etroleum reservoir fluids is described. The limits of operation are 70
0 bar and 100-degrees-C. An appraisal has been made of the sources of
error in the measurements. The equipment has been tested with pure CO2
at a series of temperatures and the results have been shown to be in
good agreement with the IUPAC equation of state, the average absolute
deviation of 53 density data points being 0.11%. PVT data have been ob
tained for a separator crude oil from a British field at temperatures
in the range 20.6-degrees-C to 65.6-degrees-C, and for its mixtures wi
th CO2 at 65.6-degrees-C. The phase behaviour of the system has been d
iscussed in the light of related literature data. Bubble points and is
othermal compressibilities have been measured and tabulated.