Search for missed deposits at Srednebotuobinskoye field in Eastern Siberia

UDK: 550.834.017
DOI: 10.24887/0028-2448-2021-5-80-83
Key words: search for missed deposits, Osinskian horizon, Yuryakh horizons, Khamakin horizon, basement protrusions, Nepa-Botuoba anteclise
Authors: E.I. Dolgova (RN-Exploration LLC, RF, Moscow), A.S. Chirgun (Taas-Yuryakh Neftegazodobycha LLC, RF, Irkutsk), A.V. Gaiduk (RN-Exploration LLC, RF, Moscow), S.N. Perevozchikov (Rosneft Oil Company, RF, Moscow)

The article is devoted to the search for missed deposits at the Srednebotuobinsky oil-gas-condensate field, which is one of the largest oil fields in Eastern Siberia. The field has been in operation since 2013. As a result the search for new deposits in an already exploited and well-studied field, new promising objects have been identified, many of which have already been proven by drilling and will soon be put into development. Often, the vector of exploration work in most fields is directed to several main layers, while the rest of the section remains unexplored, despite the high drilling depth and the availability of 2D/3D seismic data. Using the knowledge-intensive geological and geophysical approaches applied in the perimeter of the Rosneft allowed to map promising objects in the carbonates of the Osinskian and Yuryakh horizons at the already exploited field. These reservoirs reserves will be put into development in the next 2-3 years. A new object has also been identified in the sandstones of the Khamakin horizon, where the first exploratory drilling is planned in 2022. Thanks to an integrated approach, using all available geological and geophysical data, it was possible to find additional deposits within the field, provide new reserves to support production and shift the vector of exploration from the main reservoir to new, already proven promising horizons. This project is a clear and successful example of the fact that the search for missed deposits must be carried out at any field, regardless of what stage it is at.


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