The role of water-drive systems of ancient sedimentary basins in the processes of oil and gas accumulation

Abstract

The article presents the authors’ ideas about the role of post-expulsion water-drive systems in localization of hydrocarbon deposits. It substantiates the key factors of hydrodynamic stagnation, which is a characteristic feature of the large depths of ancient sedimentary basins; it reveals that, within their bounds, in conditions of regional reservoir pressure deficiency the formation of synclinal hydrocarbon deposits is possible, and under ultra-high reservoir pressure – that of zones of oil and gas accumulation of autoclave type, within which the hydrogenation of mixed humus–sapropel organic matter is viable.