Water, CO2, and steam flooding in oil wells are common today as many of the premium reservoirs are becoming significantly more difficult to efficiently produce. Much of the technology for optimizing the recovery in these assets revolves around well placement and production controls. When early flood-front breakthrough occurs, the options for improved asset economics are generally limited to near-wellbore controls to minimize the costs of producing, separating, and disposal of nonhydrocarbon production. Often, these controls have short-term effectiveness, and intervals or wells are prematurely abandoned. Altering flood fronts deep in the reservoir will offer much greater effect and longer-lasting control of nonhydrocarbon production. Successful alteration of the sweep pattern deep in the reservoir yields better sweep efficiency, lower operating costs and higher ultimate recovery.

This paper explores the benefits of well completions that incorporate a combination of near-wellbore and deep reservoir controls to modify the fluid-flow pattern when production coincides with an active water flood. By using numerical simulation of various completion methodologies with and without these controls, the benefits will become apparent. Optimization of these controls for a given completion will be illustrated for a single producer horizontal with vertical injector and for a producer pair of horizontals with a horizontal injector.

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