Determination of sediment conditions of the Jurassic deposits of the Akkuduk field based on the analysis of ichnofossils

Abstract

In this paper were presented the results of the lithological-sedimentological description of the core material of the Middle-Upper Jurassic deposits with additional study of the vital activity traces of organisms in Akkuduk field to determine the environmental condition and identification of facies. The Akkuduk field is characterized by a rather complicated environmental conditions and understanding of sedimentation processes. In the course of the work, 9 main ichnogenus were identified in the core samples that make up the section of the field, which contain numerous traces of the vital activity of organisms that do not differ in diversity. Associations were determined to identify facies in the section and their dependence on trace fossils. The generalization of the obtained materials enabled to build columns with the definition of facies and envionmental conditions, which subsequently can be used for conducting facies modeling in the geological model of the field. Keywords: lithology; sedimentology; ichnofossils; traces fossils; ichnofacies; facies.