Energy-saving technologies for producing water-cut oil using downhole oil-water gravity separation systems

Authors: V.M. Valovsky, G.Yu. Basos, K.V. Valovsky (TatNIPIneft Tatneft OAO), R.G. Zabbarov (Engineering Centre of Tatneft OAO)
The paper discusses ways to improve efficiency of wells producing heavily water-cut oil using technologies based on downhole gravity oil and water separation. The technological solutions include systems for alternate discharge of oil and water to the inlet of downhole pump, devices for separate lift of oil and water, ESP-based dual-action pumping systems providing for lift of water-free oil to surface and simultaneous pumping of segregated water to water-absorbing formation.

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