Hydrocarbon systems and combined traps of the lower-middle jurassic deposits of the northern regions of Western Siberia
The features of oil and gas complexes (OGC) of the lower-middle jurassic deposits of the Nadym-Taz region in the north of the West Siberian oil and gas basin (OGB) and the confinement of accumulations to traps of non-anticlinal structure are considered.The lithological and geochemical characteristics of the deposits are given, the degree of catagenetic transformation of organic matter (OM) is estimated, the accumulations are typified by chemical types and subtypes based on the hydrocarbon composition (HC) and the phase state of HC deposits is predicted. The deposits are differentiated by the amount of geological reserves. The prospects of the lower-middle jurassic deposits are shown.