Abstract
Retrograde Gas Condensate reservoirs are economically valuable assets but constitute a complex system in its management and development. Condensate banking due to liquid condensation below the dew point pressure raises technical and economic concerns in unlocking reservoir potentials. As pressure decreases with production below the dew point, liquid drop out phenomena is inevitable. This has two major consequences for an operator. First, the condensation of liquid/condensates which are immobile and remains trapped in the reservoir pores due to capillary-induced interfacial tension creates a permanent formation damage/impairment signified by a reduction in gas relative permeability and productivity. Secondly, the bulk of heavier and valuable components are lost to the pores of the reservoir rock. In this study, the interactions among fluid flow and reservoir rock properties were integrated in modeling and simulation of a retrograde gas condensate reservoir undergoing gas cycling. Economic evaluations based on reservoir performance indicate that, with gas cycling, a 70% and 90% recovery in condensate and gas respectively with an Internal Rate of Return (IRR) of 41% is feasible.
