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Geology and History of Petroleum Formation in Northern West Siberian Basin

Alexey E. Kontorovich1, Lev M. Burshtein1, Sergey A. Guskov1, Sergey V. Ershov1, Georgy G. Shemin1, Eirk Fjellanger2, Scott A. Barboza3, and Martine J. Hardy2
1Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia.
2ExxonMobil International Ltd, Leatherhead, United Kingdom.
3ExxonMobil Upstream Research Company, Houston, TX.

The study represented herewith is of regional character, aiming to refine on conceptualization of petroleum formation in the northern and deepest part of West Siberian basin (including the Kara Sea off-shore area).

The geological model of the studied area, reflecting its modern state, contains tectonic map for the sedimentary cover, a set of regional structural maps for Jurassic, Cretaceous, and Cenozoic reference horizons, actual thicknesses maps for specific stratigraphical complexes with lithological varieties defined, as well as present-day temperatures and heat-flow maps; thickness maps for Cenomanian -Cenozoic eroded section, and glacier and permafrost thickness maps. The model includes a series of paleo-geographic maps of the northern West Siberian petroleum province at various time intervals.

Special geochemical studies resulted in building maps for OM katagenetic transformation and for Corg content, complemented by geochemical characteristics of OM of hydrocarbon producing rocks, and oils, gases and condensates generated by them. In addition, analyses were done to establish kinetic parameters of kerogens.

Based on this, a numeric model was built, reflecting present-day structure of the Mesozoic sedimentary cover of the studied area and its most essential geological and geochemical characteristics.

In the study to follow-up the geological and geochemical modeling, there were built 4D (3D+T) oil and gas generation, migration and accumulation simulations at various scales, both for the entire study area and for focused localities within its borders.

 

AAPG Search and Discover Article #90096©2009 AAPG 3-P Arctic Conference and Exhibition, Moscow, Russia