DOI: 10.24412/2076-6785-2021-3-22-27
Abstract
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.
Materials and methods
Materials: Materials: an analytical database of the properties of oils and condensates of the lower-middle jurassicdeposits of the Nadym-Taz oil and gas region, the stages of catagenetic transformations of OM of rocks, as well as the values of geological reserves. Methods: comparison of lithofacies environments of sedimentation of deposits of an oil and gas complex, cartographic construction, graphical representation of the dependences of geochemical parameters and the size of hydrocarbon accumulations.
Keywords
lower-middle jurassic deposits, traps of non-anticlinal type, forecast of the phase state, oil, condensates, scale of accumulations
