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- W2087110114 abstract "Abstract The paper deals with the unique experience of Odoptu-more (Northern dome) field development by Rosneft. The field is located 5–7 km from the Shore of Sakhalin Island under the Sea of Okhotsk waters. Onshore extended-reach wells (ERW) with horizontal section are drilled in severe arctic conditions. Similar ERD technology is used worldwide: in the North Sea (BP, Wytch Farm) [1], for example, on South China Sea shelf, at Tiera del Fuego coast (Total, Hidra field) [2]. The successful experience of extended-reach drilling (ERD) gained by Rosneft since 1998 was adopted in 2003 by Exxon Neftegaz Ltd. - Sakhalin-1 Project consortium operator - who revised his initial plans of using expensive fixed sleetproof offshore platform and started Chayvo field development applying onshore ERW [3]. The paper describes the results of geosteering of ERW with up to 800 m long horizontal section in 3–4 m layer at 1500 m TVDSS. Horizontal displacement of 6000 m is typical for this wells. ERD in such geological conditions is a very delicate job considering geological uncertainties related to structure dip angle variation and reservoir discontinuity. It is the first successful application of ERD on the Russian shelf. Moreover, paper touches upon the optimal object development pattern reasoning. Main design solutions that helped to avoid a number of problems connected with subsurface geology and technological restrictions are described. Introduction Oil and gas field Odoptu-more, discovered in 1977, is near the Sakhalin island coastal line. Exploration during 1977–1982 was conducted under the General Agreement signed by Sodeco (Japan) and the Ministry of Foreign Trade of the USSR. Three prospect and 12 exploration well were drilled at that period. In 1984 SakhalinNIPImorneft scientific research institute presented the estimation of reserves and the feasibility study of oil recovery according to which field development from fixed sleetproof offshore platform was declared unprofitable and reserves were stated as non-commercial. In 1993 Odoptu-more field was included in Sakhalin-1 project, established by Sakhalimnmorneftegaz (SMNG), Exxon and Sodeco. In 1994 following the feasibility study of Chayvo, Arktun-Dagi and Odoptu fields joint development Odoptu field development itself was considered uneconomic and therefore Odoptu-more (Northern Dome) license block was separated from the project and the operating license passed to SMNG. In 1998 pilot development of Odoptu-more was started." @default.
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- W2087110114 date "2008-10-28" @default.
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- W2087110114 title "The Unique Experience of Odoptu-more Field Development - a New Stage in Russian Offshore Projects" @default.
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- W2087110114 doi "https://doi.org/10.2118/114436-ms" @default.
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