An element model was used to investigate the effect of using the existing crestal gas injectors in the Statfjord Fm at the Statfjord Field for additional updip water injection. The element was extracted from a history matched full field model and refined. The simulations gave accelerated production and increased oil recovery of approximately 5% with updip water injection, primarily because of better pressure maintenance, better sweep of lower parts of the formation and less problems with gas production constraints. Sensitivities on selected parameters did not indicate anything in disfavour of updip water injection. Full field simulations have confirmed the potential of updip water injection, and the scheme is found to fit very well into the overall Statfjord Field strategy.

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