Abstract
The distribution patterns of oil, oil-gas-condensate, and gas-condensate accumulations in the Jurassic and Cretaceous sediments of the Kuma-Tyulenevo swell in Eastern Ciscaucasia, as well as the regular changes in the physicochemical properties of the oils, by-products gases, and condensates, are associated with the features of differential entrapment of the hydrocarbons along their migration routes. The pattens of differential entrapment of hydrocarbons under different geological conditions are discussed: in the regionally distributed strata during lateral migration along a series of parallel and intersecting or merging anticlinal zones; along different regionally distributed strata in an anticlinal zone; during vertical overflow, etc. The pattens of spatial distribution of oil and gas accumulations may be used for directed prospecting.
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