--> Abstract: Petroleum System Play and Electronic Geochemical Mapping for Russian Petroliferous Basins, by N. V. Lopatin, T. P. Emets, E. N. Cheremisina, and O. I. Simonenkova; #90942 (1997).

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Abstract: Petroleum System Play and Electronic Geochemical Mapping for Russian Petroliferous Basins

LOPATIN, N. V.*, T. P. EMETS, E. N. CHEREMISINA, O. I. SlMONENKOVA

The West Siberian, Volgo-Ural, Timan-Pechora, Barents Sea and Northern Precaspian basins contain the largest demonstrative reserves of gas (more than 60 trillion m3) and oil (about 20 billion tons). The main productive reservoirs are the Cretaceous and Carboniferous. The Volgian, Kimmeridgian and Upper Devonian black shales formations have extremely high values of petroleum potential (from 15.10 to 220.90 mg HC's/g rock) and hydrogen index (270 to 965 mg HC's/g TOC). Organic Geochemistry input to petroleum system play include the Rock-Eval pyrolysis data set, biomarker and carbon stable isotope measurements for "oil-to-oil" and "oil-to-source rock" correlation, thermal maturity determination by R0 (%) measurements, 1D and 2D basin modeling and chemical-kinetic experiments, lithofacies analysis for source rocks and electronic mapping using "INTEGRO" programs. As a result we constructed the series of computer maps: lithofacies distribution, organic carbon and residual petroleum potential richness, kerogen quality, maturation, oil expulsion efficiencies and others. Organic geochemistry on petroleum exploration has determined the presence of petroleum generative depressions and immature area of the Volgian and Kimmeridgian shales source rocks, some vertical migration pathway from overpressure source rock to lower-pressure Cretaceous sandstone reservoirs, the timing of oil expulsion and estimation of volume of hydrocarbon delivered to traps and the mapping of prospective traps where economic petroleum accumulations are located.

AAPG Search and Discovery Article #90942©1997 AAPG International Conference and Exhibition, Vienna, Austria