Definition of the geological structure of deposits of Tyumen suite based on the results of tectonic-sedimentary analysis of the eastern part of the Krasnoleninsky arch of Western Siberia

Abstract

We present in this article results of an analysis of materials of a complex of geological and geophysical studies, including a description of the core data, facies' characteristics, tectonic features of the evolution of the territory, field development geophysical data. The initial materials for the research were the drilling data and the results of seismic surveys, as well as publications of geologists and geophysicists dealing with the problem of finding ways to increase the efficiency of the development of hard-to-recover reserves of Tyumen suite. The research area is confined to the eastern slope of the Krasnoleninsky arch of Western Siberia, within which several oil fields of various sizes have been identified that are now being actively development.Based on the work carried out on the group of layers of Tyumen suite, areas of distribution of lithofacies of fine-medium-grained and multi-grained sandstones within the forecast area of development of channels and cones of deltas and facies of channel valleys were identified, taking into account the structural factor and isopach maps. The transverse dimensions of the boundaries of the development of riverbed valleys with a very complex configuration range from 0.5 to 2.5 km. The predicted effective sandstone thicknesses of individual strata in areas with improved filtration and capacitive properties reach 12-14 m.The analysis of the geological structure of the deposits of Tyumen suite will serve as an information basis for creating the molds of reliable geological model, based on which, with the help of digital modeling, an assessment of the prospects for further work on the object under study and the search for the necessary methods for its development will be