Abstract

Focusing on the Smoerbukk (Smorbukk) fields it is proposed to introduce imbibition capillary pressure by a new method which entails representing Pc analytically starting from the primary drainage curve. Predicted saturation is shown to agree with wireline log data from a Smoerbukk South well were the initial distribution of saturation was likely established by an imbibition process. Numerical simulation shows that introducing imbibition capillary pressure siguificantly reduced predicted water cut in downflanks producers as compared to simulations presuming no capillary transition zone. This allowed repositioning the producers closer to the oil-water contact, thereby increasing recovery.

Finally, it is demonstrated that numerical simulation efficiency improved by introducing imbibition capillary pressure.

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