Looking for the Giants - Sedimentation and Basin Modelling Application for South Kara Basin

Regional modeling approach including Sedimentation and Basin modeling had been applicated with use of Beicip Franlab software tools (Temis and Dionisos) in Kara Sea regional studies at Gazpromneft Science and Technology Centre. As a result of the modeling, the possibility of further discoveries of giant fields in South Kara Basin is pretty high. Although gas accumulations are predominating in the basin, oil-and-gas condensate fields with sufficient part of liquid hydrocarbons could be found in the areas where the source rocks facies and maturation is favorable. We assume that the main source for the hydrocarbons, accumulated in the South Kara Basin in Cretaceous reservoirs are the Uppermost Jurrasic, as well as Lowermost and Middle Jurrasic shales with mostly marine type of kerogen. Lower Cretaceous (apt-alb) sediments enriched in terrigenous organic matter and containing coaly layers never entered the “oil window”, so they could produce only shallow biogenic gas, which can’t be assessed quantitatively using basin modeling technique and may affect the pools, mixing with the thermogenic gas from Jurrasic source rocks. Further studies and new geological and geochemical data required to refine the model and make sure that the geological and geochemical model assumptions were correct.