EFFECT OF CYCLIC FLOW INTERRUPTIONS ON PERFORMANCE OF VERTICALLY DIRECTED MISCIBLE FLOODS

Spatial variation in permeability can result in a wide range of critic al rates in heterogeneous carbonate reservoirs undergoing vertical mis cible floods. Such situations provide an opportunity for new design st rategies where gravity, viscosity, and forces are used to advantage to improve miscible flood performance. One such design strategy is use o f cyclic interruptions in the form of well flow shut-in. Field observa tions and laboratory experiments are presented.