RELATIVE PERMEABILITY CURVES FOR HIGH PRESSURE, HIGH TEMPERATURE RESERVOIR CONDITIONS

Ahmed Gawish, Emad Al-Homadhi

Аннотация


The Objective of this paper is to clearly investigate the effect of some factors on oil- water relative permeability curves under certain reservoir pressure and temperature. In literature, the effect of different factors on relative permeability of oil-water systems have been studied under ambient room conditions. However, treatments studies dealing with the effect of factores under reservoir conditions are few. Therefore, in this study, wettability alterations, brine chemistry, clay content, and their impacts on relative permeability curves under particular reservoir pressure and temperature were studied. Pore pressure, pore pressure drawdown and their combined effect with overburden stress and brine chemistry on relative permeability curves were also investigated at reservoir conditions. The relative permeability was calculated using JBN method.
In conclusions, the change of wettability from water wet to mixed wet gives relatively higher relative permeability to oil at high and medium oil saturation in the core samples. But at low oil saturation the relative permeability to oil becomes lower in mixed wet than in water wet.
At reservoir temperature, the oil relative permeability increases at all oil saturations compare with room conditions. This effect may be not due to the change in wettability but due to the change in viscosity ratio.
The effect of clay content on all permeability types (absolute, effective, relative permeability, relative permeability ratio, and fractional water flow) was bad due its damaging effect.
The increase of net overburden pressure cause decrease in the relative permeability of oil, however, its effect on relative permeability of water was negligible

Полный текст:

PDF

Литература


>1. M. Honarpour, and S. M. Mahmood "Relative-permeability measurements an overview". SPE paper 18565.

2. F.F. Craig, Jr The Reservoir Engineering Aspects of waterflooding. Monograph series, SPE, Richardson, TX. 1993.

3. W.G. Anderson "Wettability Literature survey- part 5: the effects of wettability on relative permeability" JPT, pp 1453-1467, Nov. 1987.

4. D.N. Rao, M. Glrard, and, S. G. Sayegh "Impact miscible flooding on wettability, relative permeability, and oil recovery". SPE Reservoir Engineering, pp 204-528, May 1992.

5. J. S. Archer, and C. G. wall, Petroleum Engineering: Principles and Practice. Graham and Trotman Inc, Gaithersburg. MD., USA 1986 pp. 108.

6. J. Vivek, S. Chattopadhyay, and M. M. Sharma "Effect of capillary pressure, salinity, and aging on wettability alteration in sandstones and limestones". SPE paper 75189, presented in IOR symposium, Tulsa, OK, 13-17 April 2002.

7. M. Khairy,. and A. Al-Quraishi,, “The Effect of Pore Pressure on Oil-Water Relative Permeability Curves”, Al-Azhar Engineering 7th International Conference, Cairo, 7-10 April, 2003.

8. B. Pedrera, H. Bertin, G. Hamon, and A. Augustin,"Wettability effect on oil relative permeability during a gravity drainage", SPE paper 77542, presented at the SPE Symposium on IOR, Tulsa, OK, April 2002.

9. T.A. Edmondson "Effects of temperature on water flooding" J. Can. Pet. Tech. (Oct.-Dec. 1965) 236.

10. M. Polikar, S.M. Farouq Ali, and V.R. Puttagunts "High-temperature relative permeabilities for Athabasca oil sands". SPE Reservoir Engineering, pp 25-32, Feb. 1990.

11. F.J. Casse, and H.J. Ramey Jr. "The effect of temperature and confining pressure on single-phase flow in consolidated rocks". SPE paper 5877.

12. R.D. Sydansk "Discussion of the effect of temperature and confining pressure on single-phase flow in consolidated rocks". SPE paper Aug. 1980.

13. M.A. Miller, and H.J. Ramey Jr. "Effect of temperature on oil/water relative permeability of unconsolidated and consolidated sands". SPE paper 12116, December 1985.

14. S. J. Torabzaden, and L.L. Handy "The effect of temperature and interfacial tension on water/oil relative permeabilities of consolidated sands". SPE paper 12689, Symposium on EOR, Tulsa, OK, April 1984.

15. E.M. Braun, and R.J. Blackwell "A Steady-state technique for measuring oil-water relative permeability curves at reservoir conditions". SPE paper 10155.

16. B.D. Gobran, W.E. Brigham, H.J. Ramey Jr "Absolute permeability as a function of confining pressure, pore pressure, and temperature". SPE Formation Evaluation, pp 77-84, March 1987.

17. M Khairy,, A. Al-Quraishi, and A. Alsughayer, ”Effect of Oil Type, Temperature, and Salinity on the Relative Permeability Curves and Wettability of Sandstone”, Al-Azhar Engineering 7th International Conference, Cairo, 7-10 April, 2003.

18. J.M. Schembre, G-Q. Tang,, and A.R. Kovscek "Effect of temperature on relative permeability for heavy-oil diatomite reservoirs". SPE paper 93831 CA, USA, 30 March-1 April 2005.

19. H.S. Ali, M.A. AL-Marhoun, Abu-Khamsin, and M.S. Calik "The effect of overburden pressure on relative permeability". SPE paper 15730, Manama, Bahrain, March 7-10 1987.

20. J. P. Ekwere, S. Khataniar "The effect of Instability on relative permeability curves obtained by the dynamic-displacement method". SPE Formation Evaluation, December 1987.

21. T. Ahmed, Reservoir Engineering Handbook. Gulf Publishing Company, Houston, TX., 2001.

22. V.H. Nguyen, A.P. Sheppared, M.A. Knackstedt, and W.V. Pinczewski "The effect of displacement rate and wettability on imbibition relative permeabilities". SPE paper 95953 Dallas, TX., 9-12 Oct. 2005.

23. E.F. Johnson, D.P. Bossler, and V.O. Naumann "Calculation of relative permeability from displacement experiments". Petroleum Transactions, AIME Vol. 216 pp 370-372 , 1959.

24. J. Toth, T. Bodi, P. Szucs, and F. Civan "Direct determination of relative permeability from nonsteady-state constant pressure and rate displacements". SPE paper 67318. Production and operations symposium, OK, 24-27 march 2001.

25. J. Toth, T. Bodi, P. Szucs, and F. Civan "Determining relative permeability from unsteady-state radial fluid displacements". SPE paper 94994. Technical conference and exhibition, Dallas, TX, 9-12 Oct. 2005.

26. A.M. Tao, and A.T. Watson "Accuracy of JBN estimates of relative permeability: part 1-error analysis". SPEJ, pp 209-214, April 1984.

27. A.M. Tao, and A.T. Watson "Accuracy of JBN estimates of relative permeability: part 2-algorithms". SPEJ, pp 215-222, April 1984.


Ссылки

  • На текущий момент ссылки отсутствуют.