Abstract
The geophysical position of the main zone of oil generation, using a model of uniform continuous subsidence of the oil-surface layer, is considered. The change in temperature, depth, and time at three levels of the main zone of petroleum generation and one level of the main zone of gas generation in association with the rate of subsidence of the oil-source layer and different geothermal gradients in the sedimentary basins has been analyzed. Other conditions being equal, the greater the rate of subsidence of the sedimentary basins, the earlier the main stage of oil generation begins under these more rigid thermobaric conditions. With equal rates of subsidence of the sedimentary basins, the greater the geothermal gradient, the greater the temperature and the lower the depth of the main zone of oil-generation levels; in this case, the oil-source layer appears earlier and the main source of petroleum generation passes more rapidly, and the thickness and temperature interval of the main zone of oil generation are increased. The space-time position of the main zone of oil generation model of uniform continuous subsidence has been compared with the present position and the paleo-reconstructions of the main source of oil generation in the various basinsmore » of the USSR, France, USA, Canada, Algeria, and West Germany.« less
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