Lithology, organic geochemistry, and formation conditions of basic rocks in the Bazhenovka Formation (West Siberia)

The lithology and organic geochemistry of the major oil-producing formation in the West-Siberian petroliferous basin, Bazhenovka Formation, are consid ered. Two types of rocks making up the formation are described; biogenic (b azhenovites) and terrigenous (mudstones),. Their organic composition and di stribution of hydrocarbons-biomarkers are studied. The paper considers the cyclic character of sedimentation on the area of the West-Siberian sea basi n the Volgian and refines the model for this sedimentation. also, oil gener ation potentials of the bazhenovites and mudstones and some regularities of the petroleum potential of the West-Siberian basin are discussed and subst antiated.