Prospects for finding new deposits on the periphery of mature fields at a late stage of development

UDK: 550.834.02

DOI: 10.24887/0028-2448-2025-12-15-19

Key words: 3D Common Depth Point (CDP) seismic survey, tectonic faults, organogenic structures, seismogeological analysis, Kama-Kinel trough system, Lower Carboniferous terrigenous stratum, horizontal wells, drilling

Authors: R.F. Timerkhanov (RN-BashNIPIneft LLC, RF, Ufa); A.M. Vagizov (RN-BashNIPIneft LLC, RF, Ufa); E.D. Antonov (RN-BashNIPIneft LLC, RF, Ufa); T.R. Khisamiev (RN-BashNIPIneft LLC, RF, Ufa); A.T. Gareev (RN-BashNIPIneft LLC, RF, Ufa); T.R. Akhtareev (Bashneft-Dobycha LLC, RF, Ufa); I.I. Saygafarov (Bashneft-Petrotest LLC, RF, Ufa)

This paper presents the results of the search for new oil accumulations based on the application of 3D Common Depth Point (CDP) seismic surveys in the peripheral areas of a mature oil field. The 3D CDP seismic survey conducted in 2016 revealed a structural high associated with the Bobrikovo-Radaevsky horizon and led to the discovery of new accumulations in terrigenous strata and in the overlying carbonate deposits. Analysis of data acquired after the initial well penetrated the reservoir highlighted the need for further investigation of the accumulation through deep drilling to delineate its complex geometric outline and determine the geological structure of the flank zones. Subsequently drilled pilot holes enabled the refinement of reservoir boundaries and oil-water contacts. The commissioning of the first horizontal well targeting the Bobrikovo-Radaevsky horizon confirmed predictions of high reservoir productivity. The study demonstrates how multidisciplinary collaboration among geologists, seismologists, geophysicists, and reservoir engineers enabled high-quality seismic-geological analysis of the 3D CDP data, justifying an optimal development strategy aimed at maximizing the oil recovery factor. The obtained results indicate the potential for modernizing approaches to the development of mature fields, which can extend the period of active production for fields with a long development history, thereby increasing production efficiency and opening new prospects for replenishing the resource base.

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