Numerical Algorithms for Determination of Retrograde Region of Gas Condensate Reservoir

• Autorzy: Tarom N. , Jalali F. , Al-Sayegh A. , Moshfeghian M.
• Języki publikacji: EN

Abstrakty

EN

Twomathematical algorithms based on a cubic EOS are developed to determine the retrograde region for reservoir fluids. The first method is based on marching and the second one utilizes regression analysis. In marching method, a series of flash calculations is performed to calculate maximum L/F (moles of liquid/moles of feed). In the regression method, a non-linear regression and an optimizationmethod in addition to a limited number of flash calculations are used to determine the maximum L/F. Based on these mathematical algorithms a computer program to predict a full phase envelope containing the retrograde curve was developed. The computer program consists of three basic parts of bubble point, dew point, and flash calculations. These three basic parts are used to determine the retrograde region. In the course of determination of the retrograde condensation region, the coordinates of critical point and cricondentherm point were also determined and used to speed up the search method. Several cases were studied and it was found that the regression method is faster and more accurate.

Słowa kluczowe

EN

retrograde region; phase envelope; equation of state; critical point

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2006
• Tom: Vol. 80, nr 1
• Strony: 51--64
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Tarom N.

autor

Jalali F.

autor

Al-Sayegh A.

autor

Moshfeghian M.

• Institute of Petroleum Engineering, University of Tehran, Tehran, P.O. Box 11365-4563, Iran

Bibliografia

• 1. Katz P. L. And Lee R. T., Natural Gas Engineering Production and Storage, McGraw Hill publishing Company, NY, 1990.
• 2. Vand der Waals, Doctoral Dissertation, Leiden, The Netherlands, 1973.
• 3. Soave G., Chem. Eng. Sci., 27, 1197 (1972)
• 4. Peng Y. D. and Robinson D. B., Inol. Eng. Chem.Fundam., 15, 59, (1976)
• 5. Nasrifer Kh. And Moshfeghian M., Fluid Phase Equillib., 190, 73 (2001).
• 6. Two C. H., Coon J. E. And Cunningham J. R., Fluid Phase Equillib., 75, 65 (1992)
• 7. Rigges J. B., An introduction to Numerical Methods for Chemical Engineering, Second Edition, Texas Tech., University Press, Lubbock, Texas, 1994.
• 8. Wu. R. S., and Fish R. M., J. Can. Petrol. Technol., 28, 112 (1989).
• 9. Firoozabadi A., Therodynamic of hydrocarbon Reservoir, McGraw-Hill Book Company, NY, 1994.
• 10.Stradi B. A., Brenneeke J. F., Kohn J. P. and Stadtherr M. A., Reliable Computation of Mixture Critical Points, Department of Chemical Engineering, University of Notre Dame, Notre Dame, IN USA, July 2000.