Related Papers
New explicit correlation for the compressibility factor of natural gas: linearized z-factor isotherms
Adewale Kareem, M. Al-marhoun, T. Iwalewa
The compressibility factor (z-factor) of gases is a thermodynamic property used to account for the deviation of real gas behavior from that of an ideal gas. Correlations based on the equation of state are often implicit, because they require iteration and are computationally expensive. A number of explicit correlations have been derived to enhance simplicity; however, no single explicit correlation has been developed for the full range of pseudoreduced temperatures 1.05 <Tpr <3 and pseudo-reduced pressures 0.2 <Ppr <15 , which represents a significant research gap. This work presents a new z-factor correlation that can be expressed in linear form. On the basis of Hall and Yarborough’s implicit correlation, we developed the new correlation from 5346 experimental data points extracted from 5940 data points published in the SPE natural gas reservoir engineering textbook and created a linear z-factor chart for a full range of pseudo-reduced temperatures 1:15 < Tpr<3 and pseudo-reduced pressures 0:2<Ppr <15.
Romanian Journal of Petroleum & Gas Technology
The Influence of Pressure and Temperature on the Compressibility Factor
2021 •
Florinel Dinu
The natural gas compressibility factor indicates the compression and expansion characteristics of natural gas under different conditions. It is a thermodynamic property used to take into account the deviation of the behaviour of real natural gases from that of an ideal gas. Compressibility factor, Z, values of natural gases are necessary for most petroleum gas engineering calculations. In this study, a comparison between five different calculation methods is presented to determine this critical parameter for the same natural gas at different conditions (pressure and temperature), using Canadian Association of Petroleum Producers, Azizi, Behbahani and Isazadeh, Dranchuk- Purvis- Robinson, Dranchuk-Abu-Kassem and Standing- Katz methods. The correlations are based on the equation of state are often implicit because they require iteration. Many correlations have been derived to enhance simplicity; however, no correlation has been developed for the entire range of pseudo-reduced pressure...
CALCULATION OF Z FACTORS FOR NATURAL GASES USING EQUATIONS OF STATE GAS TECHNOLOGY Calculation of Z Factors For Natural Gases Using Equations of State
Emaline Chiele Ferrari
[William Lyons] Working Guide to Petroleum and Nat(BookFi.org)
Tiago Da Silva
Estimation of Natural Gas Compressibility Factors Using Mathematical
2019 •
Khaled Mezughi
Knowledge of the pressure-volume-temperature (PVT) behavior of natural gases is necessary to solve many petroleum engineering problems. Gas reserves, gas metering, gas pressure gradients, pipeline flow and compression of gases are some of the probl ems requiring the gas compressibility factor, or Z factor. Typically, the Z factor is determined by laboratory measurement. However, labo ratory data is only applicable for the conditions and condition investi ga ed. When conditions Estimation of Natural Gas Compressibility Factors ــ ـ ـــــ ــــــــــــــــــــــــــــــــــــ ــــــــــــــ ـــ University Bulletin – ISSUE No.21Vol. (5) – Augus t2019. 76 of interest are different from those of the laborat y studies or data is not available, correlations must be used. This study has been conducted on four gas fields of Sirte Oil Company, namely Zeltinfield, Al Ragouba field, Al H otayba field and Al Braiga field. The Z factor has been calculated for the different fields using mathematica...
Forschung im Ingenieurwesen
Compressibility charts for gases with different acentric factors and evaluation of the Redlich-Kwong-Soave equation of state
1991 •
K. Antonopoulos
Journal of Natural Gas Chemistry
An efficient correlation for calculating compressibility factor of natural gases
2010 •
Reza Mosayebi Behbahani
Predicting the compressibility factor of natural gases containing various amounts of CO2 at high temperatures and pressures
2020 •
adel elsharkawy
In recent years, many natural gas reservoirs have been discovered with varying CO2 contents, many of which are at supercritical conditions. Calculation of compressibility factors for such reservoirs is important. Therefore, this research presents an extensive review of the various methods to calculate the compressibility factor for different natural gases containing CO2 at various temperatures and pressures. It also provides a comprehensive evaluation of the accuracy of well-known and recently published mixing rules, as well as various Z-factor correlations. Finally, a set of new correlations is presented to calculate the gas compressibility factor with reasonable accuracy. The Z-factor from the proposed correlations, as well as the PR and SRK equations of state are examined against several measured Z-factors for natural gases at supercritical conditions. The proposed correlations have a correlation coefficient of 96% and can be used to calculate compressibility at high pressures an...
The Canadian Journal of Chemical Engineering
An improved algorithm for calculation of the natural gas compressibility factor via the Hall-Yarborough equation of state
2014 •
Moein Assar
Computation of the Compression Factor and Fugacity Coefficient of Real Gases
Roel Saavedra
