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→Water cut
===Water cut===
===Water cut===
Water cut is the fraction of a liquid production stream that is water, where oil cut = 1 - water cut. Like GOR, water cut will change during the life of a reservoir, and periodic mapping can serve as a performance indicator for reservoir management. A variety of performance features can be indicated by water cut maps, including [[Production problems#Water-gas coning|water coning]], [[directional permeability]] or channeling, and [[Rock-water reaction: formation damage#formation damage]].
Water cut is the fraction of a liquid production stream that is water, where oil cut = 1 - water cut. Like GOR, water cut will change during the life of a reservoir, and periodic mapping can serve as a performance indicator for reservoir management. A variety of performance features can be indicated by water cut maps, including [[Production problems#Water-gas coning|water coning]], [[directional permeability]] or channeling, and [[Rock-water reaction: formation damage|formation damage]].
===Cumulative production===
===Cumulative production===