oa The Benefit of Geochemistry and Basin Modeling Integration for Oil & Gas Exploration. The Case Study for Migration Analysis

Petroleum systems analysis has been carried out to better understand migration and filling processes in the eastern edge of the West Siberian basin (Yamalo-Nenets Autonomous District, Russia). Within an area of 37 793 km2 two main petroleum kitchens for Upper – Jurassic Bazhenov formation were distinguished which generated petroleum and guaranteed oil volumes to form fields in the Upper - Jurassic section of sedimentary cover. The migration processes are dominated by downward and lateral fluid flow with filled-to-spill mechanism.

The results of this research provided understanding of the lateral limit and maximum distance for migration, which were later supported by the results of drilling of the well. Allowed to evaluate geological risks, correct exploration plans and change priorities in the list of prospects. It also helped to better understand geological reasons for fluid properties in Upper - Jurassic section and plan research of deeper section to find additional source rocks in Lower - Jurassic section which was previously never taken into account in this zone. Later this statement was proved by the results of geochemical pyrolysis analysis. The upgraiding of the model is planned in 2021 to solve more local issues for production process.