3D seismic exploration opportunities in studying margins of Riphean carbonate platforms (Mesoproterozoic, East Siberia)
https://doi.org/10.51890/2587-7399-2023-8-4-8-17
Abstract
Introduction. The Salair part of the Omorinsky license area is located southeast of the Yurubtchen-Tokhoma oil and gas condensate field. In paleostructural terms, it is confined to the transition zone from the shallow-shelf Riphean deposits of the Kamo Arch to the powerful deposits of the Irkineeva-Vanavara intracratonic depression. In the period 2006-2012, exploratory drilling and 3D seismic exploration were carried out here.
Aim. The goal of this work is to present the results of interpretation of seismic data obtained from reprocessing.
Materials and methods. The 3D seismic survey produced heterogeneous data using both explosive and pulsed sources. In 2020, reprocessing seismic data was carried out in a single graph. The processing step of seismic date in the time domain was implemented including PrSTM migration. The used graph based on advanced 3D technologies and an iterative approach made it possible to solve the main problems of the project in the time domain. The quality material was obtained as a result of the performed processing. Update seismic date made it possible to characterize the architecture of the margin of Rifean carbonate platforms with a high degree of detail and reconstruct the history of their development.
Results. Within the Salair part of the Omorinsky license area in the interval between the reflectors R3 and R4, uncluding the Madrа, Yurubtchen and Kuyumba Formations of the Middle Riphean, three 2-nd order sequences are identified with the consistent development of carbonate platforms. These sequences are well distinguished and traced in seismic lines due to the high contrast of seismic recording.
Conclusion. Materials from the Salair part of Omorinsky license area demonstrate that modern 3D seismic is an efficient approach for studying the morphology and history of the formation of such complex and large-scale Precambrian sedimentary bodies as Riphean carbonate platforms. The 3D seismic survey makes it possible to outline sedimentary system tracts in detail, identify sequence boundaries and reconstruct the architecture of sedimentary bodies in the margin zones of Riphean carbonate platforms.
About the Authors
A. P. VilesovRussian Federation
Aleksandr P. Vilesov— Сand. Sci. (Geol.-Min.), Expert on the sedimentology of carbonate reservoirs
3–5 Pochtamtamtskaya str., 190000, Saint Petersburg
Scopus Author ID: 57198131907
V. A. Fagereva
Russian Federation
Veronika A. Fagereva — Leading geophysicist
Pochtamtamtskaya str., 190000, Saint Petersburg
Scopus Author ID: 57205616168
R. R. Khusnitdinov
Russian Federation
Rustam R. Khusnitdinov — Product manager
Pochtamtamtskaya str., 190000, Saint Petersburg
Scopus Author ID: 56358756600
D. A. Slutskiy
Russian Federation
Dmitry A. Slutskiy — Deputy head of the Eastern Siberia Project program on geology and development
Pochtamtamtskaya str., 190000, Saint Petersburg
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Review
For citations:
Vilesov A.P., Fagereva V.A., Khusnitdinov R.R., Slutskiy D.A. 3D seismic exploration opportunities in studying margins of Riphean carbonate platforms (Mesoproterozoic, East Siberia). PROneft. Professionally about Oil. 2023;8(4):8-17. (In Russ.) https://doi.org/10.51890/2587-7399-2023-8-4-8-17