Prospective exploration targets in the Tournaisian clinoforms of the Aktanish-Chishmy trough

Current petroleum exploration is characterized by a high degree of maturity in traditional plays and an increasing need to identify new, complex hydrocarbon traps. One of the most relevant research directions is the detailed structural analysis of the Kama-Kinel Trough System (KKTS) margins. This study focuses on the Tournaisian carbonate clinoform complex within the Aktanysh-Chishmy Trough (Republic of Bashkortostan). An extensive dataset, including well and seismic data, formed the basis for a detailed seismo-geological analysis. A structural-sedimentary model of the Tournaisian clinoform complex was developed. Five genetic types of exploration targets were identified, including carbonate debris fans, undaform (shelf) units and associated drape structures. Diagnostic features for each type were substantiated, and recommendations for further seismic-based studies were provided. The application of the approaches described in this paper will improve the reliability of geological modeling and the accuracy of hydrocarbon potential forecasting for carbonate clinoforms, not only within the Republic of Bashkortostan but also across adjacent areas of the Volga-Ural petroleum province. The clinoform complexes of the Kama-Kinel Trough System (KKTS) retain significant potential for further detailed exploration.