Description and prospects of oil and gas potential of the Middle Devonian – Lower Frasnian complex of the south-east of the Timan-Pechora province

Abstract

The article is devoted to the assessment of the petroleum potential of the deep Middle Devonian – Lower Frasnian oil and gas complex in the south-east of the Timan-Pechora oil and gas province. Within the Verkhnepechorskaya depression of the Pre-Ural foredeep and in the south of the Pechora-Kolvinsky aulakogen, several wells were drilled with a depth of more than 5 km, some of which opened deposits of the Lower Paleozoic. These strata are difficult to access and poorly studied, and the prospects for their oil and gas potential are unclear. The article describes the composition of the complex, gives geochemical characteristics, describes reservoir properties, and presents the results of 1 and 2D basin modeling. Models of the zoning of catagenesis are presented. The oil and gas complex includes a variety of oil and gas source rocks. It is possible to allocate collectors, as well as seals. In the Middle Devonian – Lower Frasnian sediments, the processes of oil, gas and gas condensate generation took place, which could ensure the formation of deposits both in the deep strata of the Middle Paleozoic, and in the overlying horizons. The generation and accumulation of hydrocarbons in deep-buried sediments occurred at a favorable time for the formation of deposits.