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Gas condensate reservoirs: Characterization and calculation of dew-point pressure
ALAROUJ Mutlaq,ALOMAIR Osamah,ELSHARKAWY Adel
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Gas condensate reservoirs: Characterization and calculation of dew-point pressure
A large data bank of more than 700 gas-condensate samples collected from literature and experiments was established. On this basis, empirical correlations and equations of state commonly used to calculate dew-point pressure (DPP) were evaluated. A new model for estimating DPP was proposed. All the empirical correlations and the Peng-Robinson state equation were compared, and sensitivity of parameters was analyzed. The current standards used to identify gas condensate were evaluated and found to be not accurate enough. The Peng-Robinson state equation has no unique solution and is affected by multiple factors such as the characterization of C7+ components and the splitting scheme. The Nemeth-Kennedy correlation has the highest accuracy when applied to the data bank established in this study, followed by Elsharkawy correlation and Godwin correlation. While Shokir correlation cannot be used for samples without C7+ components, it is therefore the lowest in accuracy. The newly proposed model has an average absolute error, root mean square error and coefficient of determination of 7.5%, 588, and 0.87, respectively, and is better than the above four correlations statistically. The proposed model proved to be more accurate and valid when compared to experimental results and simulation with the Peng-Robinson state equation.
gas condensate reservoir / dew-point pressure / empirical relation / equation of state {{custom_keyword}} /
| [1] | ELSHARKAWY A. Predicting the dew point pressure for gas condensate reservoirs: Empirical models and equations of state. Fluid Phase Equilibria, 2002,193(1/2):147-165. |
| [2] | ELSHARKAWY A M, FODA S G. EOS simulation and GRNN modeling of the constant volume depletion behavior of gas condensate reservoirs. Energy Fuels, 1998,12(2):353-364. |
| [3] | ESMAEILZADEH F, ROSHANFEKR M. A new cubic equation of state for reservoir fluids. Fluid Phase Equilibria, 2006,239(1):83-90. |
| [4] | PATEL N C, TEJA A S. A new cubic equation of state for fluids and fluids mixtures. Chemical Engineering Science, 1982,37(3):463-473. |
| [5] | PENG D, ROBINSON D B. A new two constants equation of state. Industrial and Engineering Chemistry Fundamentals, 1976,15(1):59-64. |
| [6] | REDLICH O, KWONG J N S. On the thermodynamics of solutions. V: An equation of state. Fugacities of gaseous solutions. Chemical Reviews, 1949,44(1):233-244. |
| [7] | SOAVE G. Equilibrium constants from a modified Redlich Kwong equation of state. Chemical Engineering Science, 1972,27(6):1197-1203. |
| [8] | ASHOUR I, AL-RAWAHI N, FATEMI A, et al. Applications of equations of state in the oil and gas industry: MORENO J C. Thermodynamics-kinetics of dynamic systems. London: InTech, 2011. |
| [9] | BONYADI M, ESMAEILZADEH F. Prediction of gas condensate properties by Esmaeilzadeh-Roshanfekr equation of state. Fluid Phase Equilibria, 2007,260(2):326-334. |
| [10] | EILERTS K, SMITH R V. Specific volumes and phase boundary-properties of separator-gas and liquid-hydrocarbon mixtures. BM-RI-3642, 1942. |
| [11] | GODWIN O N. A new analytical method for predicting dew point pressures for gas condensate reservoirs. SPE.162985 2012. |
| [12] | KURATA F, KATZ D L. Critical properties of volatile hydrocarbon mixtures. Trans. AIChE, 1942,38:995-1021. |
| [13] | NEMETH L K, KENNEDY H T. A correlation of dewpoint pressures with fluid composition and temperature. Society of Petroleum Engineers Journal, 1967,7(2):99-104. |
| [14] | OLDS R H, SAGE B H, LACEY W N. Volumetric and phase behavior of oil and gas from Paloma Field. Transactions of the AIME, 1945,160(1):77-99. |
| [15] | ORGANICK E I, GOLDING B H. Prediction of saturation pressures for condensate-gas and volatile oil mixtures. Journal of Petroleum Technology, 1952,4(5):135-148. |
| [16] | HUMOUD A A, AL-MARHOUN M A. A new correlation for gas condensate dew point pressure prediction. SPE.68230 2001. |
| [17] | MARRUFFO I, MAITA J, HIM J, et al. Correlations to determine retrograde dew pressure and C7+ percentage of gas condensate reservoirs on basis of production test data of eastern Venezuelan fields. SPE 75686, 2002. |
| [18] | OLDS R H, SAGE B H, LACEY W N. Volumetric and viscosity studies of oil and gas from a San Joaquin valley Field. Transactions of the AIME, 1949: 179(1):287-302. |
| [19] | POTSCH K T, BRAEUER L. A novel graphical method for determining dewpoint pressures of gas condensates. SPE.36919 1996. |
| [20] | REAMER H H, SAGE B H. Volumetric behavior of oil and gas from Louisiana Field. International Journal of Petroleum Technology, 1950,2(9):261-268. |
| [21] | MCCAIN W. Properties of petroleum fluids. Tulsa, Oklahoma: PennWell Publishing Company, 1990. |
| [22] | DANESH A. PVT and phase behavior of petroleum reservoir fluids. London: Elsevier Science B.V., 1998. |
| [23] | LAKE L W, HOLSTEIN E D. Petroleum engineering handbook. Houston, Texas: Gulf Publishing Company, 2007. |
| [24] | BEGGS H D. Gas production operations. 5th ed. Tulsa, Oklahoma: Oil and Gas Consultants International, Inc., 2002. |
| [25] | AHMED T. Equations of state and PVT analysis: Applications for improved reservoir modeling. Houston, Texas: Gulf Publishing Company, 2016. |
| [26] | SHOKIR E, EL-M M. Dewpoint pressure model for gas condensate reservoirs based on genetic programming. Energy Fuels, 2008,2(5):3194-3200. |
| [27] | KATZ D. Overview of the phase behavior of oil and gas production. SPE 9995-PA, 1983. |
| [28] | LOHRENZ J, BRAY B G, CLARK C R. Calculating viscosities of reservoir fluids from their compositions. Journal of Petroleum Technology, 1964,16(10):1171-1176. |
| [29] | PEDERSEN K, THOMASSEN P, FREDENSLUND A. Phase equilibria and separation process. Lyngby, Denmark: Institute for Kemiteknik, Denmark Tekniske Hojeskole, 1982. |
| [30] | AHMED T, CADY G, STORY A. A generalized correlation for characterizing the hydrocarbon heavy fraction. SPE.14266 1985. |
| [31] | KESLER M G, LEE B I. Improved prediction of enthalpy of fractions. Hydrocarbon Processing, 1976,55(3):153-158. |
| [32] | RIAZI M R, DAUBERT T E. Characterization parameters for petroleum fractions. Industrial and Engineering Chemical Research, 1987,26(4):755-759. |
| [33] | CAVETT R H. Physical data for distillation correlations: Vapor-liquid equilibrium: Proceedings of the 27th Meeting. San Francisco, CA: API, 1962. |
| [34] | WINN F W. Simplified monographic presentation, characterization of petroleum fractions. Petroleum Refiner, 1957,36:157. |
| [35] | THOMASSEN P, PEDERSEN K S, FREDENSLUND A. Adjustments of C7+ molecular weights in the characterization of petroleum mixtures containing heavy hydrocarbons. SPE 8617, 1986. |
| [36] | EDMISTER W C. Applied hydrocarbon thermodynamics. Part 4. Compressibility factors and equations of state. Petroleum Refiner, 1958,37:173-179. |
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