Page 136 - PVT Property Correlations

Gas Condensates Chapter | 5 113

NOMENCLATURE
API density of stock-tank liquid, API
B g gas formation volume factor, rcf/scf
B o oil formation volume factor, rbbl/STB
CGR condensate gas ratio
CVD constant volume depletion
EOS equation of state
GE gas equivalent to one stock-tank barrel of condensate, scf/STB
GE w gas equivalent to one barrel of surface water, scf/bbl
GPM gallons per thousand
G p total reservoir gas production, scf
G p;ps gas production from primary separator, scf
G p;ss gas production from secondary separator, scf
G p;st gas production from stock-tank, scf
MBO modified black oil
molecular weight of component “i”, lbm/lbm mol
M i
molecular weight of stock-tank liquid, lbm/lbm mol
M o
n number of moles, lbm mol
number of moles produced in a pressure step (during CVD experiment), lbm mol
n p
N p stock-tank condensate production, STB
OGIP original gas in place
p pressure, psia
p d dew point pressure, psia
R s solution gas oil ratio, scf/STB
R v vaporized oil gas ratio, STB/scf
y i mole fraction of the components in the gas, fraction
V eq vapor equivalent of primary separator liquid, scf/STB
z z-factor at pressure, dimensionless
z d z-factor at dew point pressure, dimensionless
γ o specific gravity of stock-tank liquid, water 5 1.0
γ oi specific gravity of component “i” as a liquid at standard conditions, water 5 1.0
ρ oi density of component “i” as a liquid at standard conditions, lbm/ft 3

REFERENCES

Ahmadi, M.A., Elsharkawy, A., 2017. Robust correlation to predict dew point pressure of gas
condensate reservoirs. Petroleum 3 (3). Available from: https://doi.org/10.1016/j.
petlm.2016.05.001.
Ahmed, T., 2016. Equations of State and PVT Analysis, second ed Gulf Professional Publishing,
United States. ISBN 9780128017524.
Al-Dhamen, M., and Al-Marhoun, M. 2011. New correlations for dew-point pressure for gas
condensate. In: Paper SPE 155410 Presented at the SPE Saudi Arabia section Young
Professionals Technical Symposium. 14 16 March, Dhahran, Saudi Arabia.
Alzahabi, A., El-Banbi, A.H., Trindade, A.A., Soliman, M., 2017. A regression model for esti-
mation of dew point pressure from down-hole fluid analyzer data. J. Pet. Explor. Prod.
Technol. Available from: https://doi.org/10.1007/s13202-016-0308-9.