Effect of temperature and pressure on the composition of oils from the Bazhenovskaya Formation in the latitudinal segment of the Ob River area |
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| Authors: | O F Stasova A I Larichev N I Larichkina |
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| Institution: | (1) FGUP Siberian Research Institute of Geology, Geophysics, and Mineral Resources (SNIIGGiMS), Krasnyi pr. 67, Novosibirsk, 630091, Russia |
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| Abstract: | Detailed data obtained on surface oil samples from the Bazhenovskaya Formation in the latitudinal segment of the Ob River
area indicate that the composition of the oil is largely controlled by the P-T conditions in the reservoir. It was determined that the generation of hydrocarbon fluids starts at higher temperatures (T
f > 100°C) if the fluid reflux is hindered and the formation pressures are anomalously high. In systems with the free reflux
of hydrocarbon fluids, the processes generating oil and gas are different. The composition of oil in the Bazhenovskaya Formation
with the free reflux of hydrocarbon fluids is largely controlled by migration processes, which determine, along with the P-T parameters, the physicochemical characteristics of the oils and their concentrations of hydrocarbon groups and individual
hydrocarbons.
Original Russian Text ? O.F. Stasova, A.I. Larichev, N.I. Larichkina, 2006, published in Geokhimiya, 2006, No. 9, pp. 996–1005. |
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