Dana Petroleum plc, London, has completed a study of field reserves in Sortymskoye oil field in western Siberia and has decided on an export route for oil as a prelude to development.
Sortymskoye reservoir is covered by two licenses, in each of which Dana has a 30% interest. Russian partners are Tyumenneftegaz and Obneftegazgeologiya.
An independent study of reserves in the East Sortymskoye license area puts estimated proved and probable reserves at 57.3 million bbl of oil, with a further 20 million bbl of possible reserves identified.
Tom Cross, Danas chief executive officer, said this confirms the current estimate of total reserves in western and eastern sections of the field at a combined 130 million bbl.
Earlier this year Dana disclosed a plan to bring Sortymskoye into production as early as 1996, tying in four or five wells in the eastern license area by flowline to a nearby field (OGJ, Oct. 30, p. 14).
Since then, Cross said, Dana has decided that early oil production almost certainly will be routed to Mamontovskoye, less than 10 km away, which is a large oil field offering pumping and tie-in options.
Cross said most of Sortymskoyes reserves are in a Cretaceous reservoir, with more in a Jurassic layer beneath this.
Dana plans to begin producing the Cretaceous formation, and after the first six wells are on production, to drill two wells into the Jurassic.
Full scale development of Sortymskoye is expected to begin about 18 months after initial exports. Dana and Russian partners are still negotiating plans for the western part of Sortymskoye. n
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