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Investigation of desalination process in the development of saline clastic reservoirs of Verkhnechonskoye ield

Authors: I.A. Vinogradov, A.A. Zagorovsky, V.A. Grinchenko (TNNC LLC, RF, Tyumen), Ya.I. Gordeev (Verkhechonskneftegaz OJSC, RF, Irkutsk)
E-mail: IAVinogradov2@tnk-bp.com,AAZagorovskiy@tnk-bp.com, VAGrinchenko@tnk-bp.com
Key words: terrigenous formation, surficial salination, halite, desalination,washout of saline deposits, highly saline water, core experiments.

The paper addresses the issues of desalinization of terrigenous reservoir in theVerkhnechonsky horizon, pore throats of which are lined with halite. Thepaper presents general results of core laboratory tests. It demonstrateschanges in fresh water salinity and rheology during the process of its filtrationthrough salinized core sample. The scale of porosity and permeabilitychange during rock desalinization is shown. Critical factors controlling oil displacementefficiency are identified.

References
1. Verigin N.N., Sherzhukov B.S., Collection of works “Razvitie issledovaniy po
teorii fil'tratsii v SSSR” (Development of research in the theory of filtration in the
USSR), Moscow: Nauka Publ., 1966, pp. 237-313.
2. Verigin N.N., Vasil'ev S.V., Sarkisyan V.S., Sherzhukov B.S., Gidrodinamicheskiei fiziko-khimicheskie svoystva gornykh porod (Hydrodynamic and physicaland chemical properties of rocks), Moscow: Nedra Publ., 1977.
E-mail: IAVinogradov2@tnk-bp.com,AAZagorovskiy@tnk-bp.com, VAGrinchenko@tnk-bp.com
Key words: terrigenous formation, surficial salination, halite, desalination,washout of saline deposits, highly saline water, core experiments.

The paper addresses the issues of desalinization of terrigenous reservoir in theVerkhnechonsky horizon, pore throats of which are lined with halite. Thepaper presents general results of core laboratory tests. It demonstrateschanges in fresh water salinity and rheology during the process of its filtrationthrough salinized core sample. The scale of porosity and permeabilitychange during rock desalinization is shown. Critical factors controlling oil displacementefficiency are identified.

References
1. Verigin N.N., Sherzhukov B.S., Collection of works “Razvitie issledovaniy po
teorii fil'tratsii v SSSR” (Development of research in the theory of filtration in the
USSR), Moscow: Nauka Publ., 1966, pp. 237-313.
2. Verigin N.N., Vasil'ev S.V., Sarkisyan V.S., Sherzhukov B.S., Gidrodinamicheskiei fiziko-khimicheskie svoystva gornykh porod (Hydrodynamic and physicaland chemical properties of rocks), Moscow: Nedra Publ., 1977.


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