The Main Types of Sections of the Oil-Bearing Bazhenov Formation on the Northeastern Surgut Arch

摘要

The lithological study of the core samples of the Bazhenov Formation that are exposed on the northeastern Surgut arch allowed us to distinguish three types of sections, which are ascribed to the different parts of an ancient intrabasin uplift. Moving from the arch to its peripheral parts, these types demonstrate a successive change in the prevailing sedimentation type from carbonate–clayey–siliceous via siliceous to clayey–siliceous types.