Application of the Data on ?13C and ?18O of Carbonates for the Study of Unconventional Reservoirs on the Example of the Bazhenov Source Rocks, Western Siberia, Russia

This paper addresses potential application of data on stable carbon and oxygen isotope composition carbonates for study organic rich source rocks the example Late Jurassic–Early Cretaceous Bazhenov Formation (West Siberian petroleum basin, Russia). Geochemical studies were conducted sections located in central (most productive) peripheral (northern southern) regions distribution area, containing deposits formed under different conditions. We identified key factors impacting carbonate minerals established relation their to formation Using a thermodynamic model exchange carbonate–water–carbon dioxide system, it is shown that variations secondary are affected by isotopic primary sediments reactions with water dioxide, generated during transformation. Our results demonstrate together standard geochemical methods can be efficiently applied determine sedimentation conditions alteration processes oil rocks.