Integration of Forward Stratigraphic and Petroleum System Modelling in Northeastern West Siberia – New Concepts

Northern part of the West Siberian petroleum basin attracts much of scientific attention focused on exploration studies. Characteristics of imbricated petroleum systems and relations to giant oil and gas fields are far to be clearly understood. This integrated study achieved in 2014 was based on the basin modelling of Southern Gydan Peninsula, Messoyakha Arch and Bolshekhet Depression. It was performed for petroleum potential assessment, reservoirs and seals mapping, as well as evaluation of Lower Cretaceous in place resources. Comprehensive workflow included 3D forward stratigraphic modelling (Dionisos) used for detailed sedimentary facies distribution and stratigraphic traps identification, and 3D petroleum system modeling (TemisFlow). The geochemical database included pyrolysis (source rocks analysis), and GC-MS analysis (oil-source correlations). Numbers of complex processes were taken into account such as rifting events, climate changes and glaciations, Tertiary cryosphere formation and degradation, erosions, biodegradation processes, impact of the diagenesis on the pore pressure prediction. The study enable to assess the “yet to find” around the Messoyaha Arch. It also improved our understanding of petroleum systems at basin scale, confirming the importance of the Bazhenov source rock and highlighting the role of the biodegradation in the distribution of oil and gas fields.