Page 169 - PVT Property Correlations

Volatile Oils Chapter | 6 143

FIGURE 6.20 Gas formation volume factor using MBO correlation. MBO, modified black oil.

NOMENCLATURE

B g gas formation volume factor, rcf/scf
B o oil formation volume factor, rbbl/STB
CCE constant composition expansion
CVD constant volume depletion
DL differential liberation
EOS equation of state
GOR gas oil ratio, scf/STB
P sat saturation pressure, psia
P sep1 primary separator pressure, psia
P sep2 secondary separator pressure, psia
r s vaporized oil gas ratio, STB/MMscf
R s solution gas oil ratio, scf/STB
R si initial solution gas oil ratio, scf/STB
R v vaporized oil gas ratio, STB/MMscf
SG 1 primary separator gas specific gravity, dimensionless
secondary separator gas specific gravity, dimensionless
SG 2
STO stock-tank oil gravity, API

reservoir temperature, F
T r
REFERENCES
Ahmed, T., 2016. Equations of State and PVT Analysis, 2nd ed Gulf Professional Publishing,
USA, ISBN: 9780128017524.
Cordell, J.C., Ebert, C.K., 1965. A case history-comparison of predicted and actual performance
of a reservoir producing volatile crude oil. J. Pet. Tech. 17, 1291 1293.