Due to increasing interest to oil shales, study of the Bazhenov Formation deposits of the West Siberian Petroleum Basin is progressing extensively. Despite the seeming homogeneity, in closer observation the composition of the Bazhenov Formation rocks vary significantly. The main objectives were to characteristic lithology and geochemistry of the Bazhenov Formation rocks containing sapropelite interlayers. The material for the present study were core samples from several wells located in the central part of the West Siberian Petroleum Basin. During this research, samples were selected, petrographic thin sections were made and described, and pyrolysis and kinetic studies were carried out by the HAWK pyrolysis from Wildcat Technology. The current study reveals, sapropelite interlayers are characterized by high content of alginitic organic matter. The origin is yet unknown but two possible ways of forming of such deposits were proposed. The Bazhenov Formation sapropelite consist of 30÷35 % alginate with quartz and chalcedonic inclusions. Pyrolysis characteristics of sapropelite interlayers differ from host deposits by anomalously high hydrogen index HI (up to 1015 mg HC/g TOC). According to bulk-kinetics study, the whole organic matter of sapropelites transforms to HCs at single Ea around 53 kcal/mol.
|Translated title of the contribution||Geochemical characteristics of sapropelite in the Bazhenov formation deposits|
|Publication status||Published - 2019|
|Event||21st Conference on Oil and Gas Geological Exploration and Development, GEOMODEL 2019 - Gelendzhik, Russian Federation|
Duration: 9 Sep 2019 → 13 Sep 2019
|Conference||21st Conference on Oil and Gas Geological Exploration and Development, GEOMODEL 2019|
|Period||9/09/19 → 13/09/19|