Self-oscillating nature of fluid dynamic mode of a sedimentary basin in the area of the pre-Caspian fields location
The paper presents the results of the numerical modeling of fluid dynamic mode of the sedimentary basin located in the Eastern board of the Pre-Caspian Lowland and Astrakhan giant carbonate deposit. The fluids flow of enough complex composition in sub-salt layers lying at big depths are studied. The impermeable barriers are located at different levels and have limited sizes. The going upward hydrocarbons retard on the lower cover for some time and then direct towards upper one. It results in formation of giant gas-condensate deposits in the areas with the most proper conditions of hydrocarbons accumulation. The processes of hydrocarbons accumulation and outflux have a self-oscillating mode.