Petrogenic Water, Hydrothermal Process and Oil Migration in a Tectonically Activated Buried Continental Rift (West Siberia)

It was established that with convective heat and mass transfer in the region of the Krasnoleninskij swell (West Siberia), the pulsating lateral pressure regime used to contribute to interlayer water avalanche liberation from the Upper Jurassic-Lower Cretaceous smectites in the process of their hydromicatization. The resurgent (petrogenic) water constituted the basis of the hydrothermal solutions responsible for the processes of ultra-acid leaching, metasomatosis, hydrocarbon generation and migration. Enhanced evacuation of micro-oil from the source layers prevented its oxidation and promoted subsequent oil pool formation. That was mostly related to the periods of tectonichydrothermal activation of sedimentary basins, whether they were complicated or uncomplicated with rifting.