A lithofacies model for the Upper Devonian Pamyatno-Sasovskoye reef (oilfield) (Volgagradskoe Povolzhye, Russia)

Based on the exploratory drilling data provided by LLC LUKOIL-Nizhnevolzhskneft, we studied the structure, composition, and conditions of formation of the middle-upper Frasnian sections of the Pamyatno-Sasovskoye oilfield, Central Russia, which are related to a complex organogenic build-up. We also conducted a lithofacies section modeling based on the data derived from classification of secondary dolomitic limestones (as per Dunhamʹs classification), palaeontological components (e.g., algae, stromatoporoids, crinoids, gastropods, protozoans), structural constructions, and logging data.