No.1(25),2021 рр.18-40 | Neftyanaya Provintsiya Journal

Neftyanaya Provintsiya

No.1(25),2021

Lithological structure of the Osinskian horizon and identification of potential reservoir development zones using J. Lusia’s method by the example of Srednebotuobinskoye field

Е.N. Maksimova, К.N. Chertina, К.D. Bobylev, Е.S. Zyuzev, L.V. Torgashova, О.А. Krokhaleva

DOI: https://doi.org/10.25689/NP.2021.1.18-40

PP.18-40

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Abstract

References

Abstract

In 2017, Rosneft started pilot operations in the Osinsky sub-horizon, and the first industrial inflows were received. Further replication was complicated by a lack of understanding of the areal development of zones with better properties.

The Osinsky subhorizon is composed of sedimentary carbonate rocks-Dolomites and limestones with different filtration and reservoir properties in area and section. The majority of reservoirs are low-permeable with an average value of less than 2 MD. Void space in most cases is represented by pores and small cavities. Fractures have a zonal distribution.

Taking into account the complex structure and lithological heterogeneity, a complex petrophysical model was created taking into account the sedimentological features of the rocks of the Osinsky subhorizon. As the main approach, the J. Lucia method was chosen, based on the typing of voids that are closely related to the structural and textural features of carbonate rocks. Taking into account the limited knowledge of special GIS methods and the limited core research, at the time of model construction, the neural network training method was used for typing purposes, and standard (model) dependencies were adapted for a specific field.

Key words:

patch-reefs, Cambrian, Osinsky sub-horizon, reef facies, J. Lucia, Siberian platform

References

Kosentino L. Sistemnye podkhody k izucheniyu plastov [System approaches to formation evaluation]. M.-Izhevsk: Institute of Computer Science, 2001, 400 p. (translated from English)
Kuznetsov V.G., Ilyukhin L.N., Dmitrievsky S.A. et al. Drevnie karbonatnye tolshchi Vostochnoy Sibiri i ikh neftegazonosnost [Ancient carbonate rocks of Eastern Siberia and associated oil and gas potential]. Moscow: Nauchny mir Publ., 2000. 104 p. (in Russian)
Maksimova Е.N., Chertina К.N. Tsiklicheskoe stroenie osinskogo gorizonta na primere odnogo iz mestorozhdeniy Nepsko-Botuobinskoy anteklizy [Cyclic structure of the Osinskian horizon by the example of one field of the Nepsko-Botuobinskaya anticlise]. Proceedings of IX All-Russian Lithological Meeting: Lithology of sedimentary sequences of Eurasia and offshore regions. Kazan, 2019, 271—272 pp. (in Russian)
Melnikov N.V., Shabanov Yu.Ya., Shabanova О.S. Stratigraficheskaya skhema kembriyskikh otlozheniy Turukhano-Irkutsko-Olekminskogo regiona Sibirskoy platformy [Stratigraphic scheme of Cambrian sediments of Turukhan-Irkutsk-Olekminsky Region of the Siberian platform]. Geologiya i geofizika, 5(6), 2010, 863-875 pp. (in Russian)
Melnikov N.V. Yakshin М.S., Shishkin B.B. et al. Stratigrafiya neftegazonosnykh basseynov Sibiri. Rifey i vend Sibirskoy platformy i ee skladchatogo obramleniya [Stratigraphy of Siberian petroleum basins. The Riphean and Vendian of the Siberian platform and its folded margins]. Novosibirsk: Geo Publ., 2005, 428 p. (in Russian)
Chertina К.N., Maksimova Е.N., Vilesov А.P., Krokhaleva О.А. Kontseptualnaya sedimentologicheskaya model patch-rifov osinskogo gorizonta Srednebotuobinskogo mestorozhdeniya (Nepsko-Botuobinskaya antekliza) [Conceptual depositional model of patch reefs of the Osinskian horizon of Srednebotuobinskoye field (Nepsko-Botuobinskaya anticlise)]. Proceedings of All-Russian Lithological Meeting: Reef geology. Syktyvkar: Geoprint Publ., 2020, 127-129 pp. (in Russian)
Shapovalov М.Yu., Mankuta V.А. et al. Obrabotka i kompleksnaya interpretatsiya seysmicheskikh dannykh 3D sezonov 2016-2018 godov s tselyu postroeniya seysmogeologicheskoy modeli Srednebotuobinskogo neftegazokondensatnogo mestorozhdeniya [Processing and integrated interpretation of 3D seismic data of 2016-2018 for construction of seismic model of Srednebotuobinskoye oil-gas-condensate field]. Final report under agreement with Taas-Yuryakh Neftegazodobycha, Tyumen, 2019. (in Russian)
Hopley D.. Encyclopedia of modern coral reefs: Structure, Form and Process. Springer, 2011. 1205 p. (in English)
Lucia Jerry F. Carbonate Reservoir Characterization. Springer, 2007. 337 p. (in English)

Authors

E.N. Maksimova, LLC «Tyumen Petroleum Research Center»