The development covers the research in determination of the genetic types of oil fluids, the assessment of oil and gas potential of rocks, and the building of a model of hydrocarbon accumulation.

 The proposed methods are based on the original sets of geological and geochemical parameters for determination of the genesis and potential of hydrocarbon accumulation. The methods are tested on a number of deposits in the Timan-Pechora basin. Based on geochemical data and paleothermal modeling, prerequisites for hydrocarbon accumulation are determined and the explanation is given to the impact of the vertical and horizontal migration of hydrocarbons from the containing strata. The influence of epigenetic processes is determined on the stability of oil composition and on the formation of hydrogen sulfide in oil.