Geological structure of the Malyshevka Formation of the northeastern regions of Western Siberia according to the complex of geological and geophysical data

Abstract

Data on the geological structure of the Malyshevka Formation in the northeastern regions of Western Siberia in the Gydan and western parts of the Yenisei–Khatanga oil and gas regions are presented. Based on the results of dissection of the Middle Jurassic deposits, three main types of section of the Malyshevka Formation were identified. Zoning of the suite by section type is proposed. Based on a comprehensive analysis of the wave pattern of the Jurassic section on a series of temporal seismic profiles, well geophysical data, and faunal determinations, a detailed correlation of Middle Jurassic sediments was performed. Based on the results of the work, a seismogeological model of the Malyshevka Formation of the northeastern regions of Western Siberia was built, which made it possible to resolve controversial issues regarding its volumes in the southern part of the Gydan Peninsula.