Vol. 8 pp. 339-353

E.N. Ivanov, M. A. Balandin, A. I. Budko, T. A. Chikisheva

MINIMIZING THE RISK OF WELL NON-STARTUP, CONSIDERING THE PRESENCE OF A HIGH-VISCOSITY OIL LAYER IN THE RESERVOIR: A CASE STUDY OF THE OSINSKY HORIZON

Annotation. The study addresses challenges in developing carbonate reservoirs containing abnormally high-viscosity oil (up to 1586 cP) in the water-oil contact zone (WOC), using the Osinsky horizon of the Srednebotuobinskoye field as an example. Based on the analysis of vertical heterogeneity in the physicochemical properties of oil and hydrodynamic research data, a methodology for modeling the high-viscosity oil (HVO) layer within the reservoir has been proposed. Recommendations have been developed for adjusting the strategy of horizontal wellbore placement considering the position and properties of the HVO layer. This approach allows minimizing the risks of well non-startup and improving the economic efficiency of field development. The results of this work have practical significance for the development planning of fields with similar geological conditions.

Keywords: carbonate reservoirs, high-viscosity oil (HVO), water-oil contact (WOC), well non-startup risks, hydrodynamic studies, core pyrolysis, hard-to-recover reserves, economic efficiency.

For citation: Ivanov E.N., Balandin M. A., Budko A. I., Chikisheva T. A. [Minimizing the risk of well non-startup, considering the presence of a high-viscosity oil layer in the reservoir: a case study of the Osinsky horizon]. Upravlenie tekhnosferoi, 2025, vol. 8, issue 2, рр. 339–353. DOI: 10.35634/UdSU.2025.76.70.015. (In Russ.).

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About the Authors

Ivanov Evgeny Nikolaevich

Candidate of Technical Sciences, Associate Professor, Department of Oil and Gas Geology, Faculty of Geology, Irkutsk State University (ISU), 3 Lenin St., Irkutsk, 664011, Russia;

Manager for Production Optimization and Waterflooding, Field Development Department, LLC "Taas-Yuryakh Neftegazodobycha", 291 Baikalskaya St., Irkutsk, 664011, Russia.

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Balandin Mikhail Andreevich

4th-year Student, Bachelor’s Program "Geology" (05.03.01), Specialization: "Oil and Gas Geology", Faculty of Geology, Irkutsk State University (ISU), 3 Lenin St., Irkutsk, 664011, Russia;

Technician, Department of Geological and Hydrodynamic Modeling, LLC "Taas-Yuryakh Neftegazodobycha", 291 Baikalskaya St., Irkutsk, 664011, Russia.

Budko Artem Igorevich

Head of the Department of Geological and Hydrodynamic Modeling, LLC "Taas-Yuryakh Neftegazodobycha", 291 Baikalskaya St., Irkutsk, 664011, Russia.

Chikisheva Tatyana Alexandrovna

Candidate of Geological and Mineralogical Sciences, Associate Professor, Department of Mineral Resources, Geochemistry, Mineralogy, and Petrography, Faculty of Geology, Irkutsk State University (ISU), 3 Lenin St., Irkutsk, 664011, Russia.

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