Conditions for the formation of the subcoal and supracoal units of the Yu1 horizon in the northwestern part of the Kalgach inclined megaswell

Abstract

The work is devoted to the reconstruction of the formation conditions of the Yu horizon in the south of the Tomsk region. The investigation objects are situated in the region of transition from marine conditions to terrestrial, which affected the variegated lithofacies composition of the deposits and the complex geometry of sedimentary bodies. The study was based on the results of sedimentological analysis of the core, carried out by lithologists of the IPGG and the Tomsk State University, published in stock materials, as well as well logging data for 381 wells.