THE POSSIBILITY OF USING SEQUENCE STRATIGRAPHIC METHOD TO BUILD GEOLOGICAL MODELS FOR THE RECONSTRUCTION OF EVOLUTION OF PETROLEUM BASIN
The article is devoted to the evaluation of the possibilities of using the sequential-stratigraphic method in constructing geological models for reconstructing the evolution of the oil and gas basin. The task of modeling the geological structure and processes of formation of reservoirs and hydrocarbon deposits to minimize geological risks at all stages of geological exploration is determined by the need to optimize their industrial development. Analysis of the historical and geological evolution of sedimentary deposits is of key importance for the discovery and understanding of the processes of oil and gas formation and oil and gas accumulation, which is important for assessing the prospects of oil and gas bearing particularly deep horizons reaching 4 km or more, especially poorly studied during geophysical research and / or drilling. The author analyzed the possibilities of the sequential-stratigraphic method, which together with other geological and geophysical methods, reliably recreates the evolution of the oil and gas basin, which in turn allows modeling of lithological-structural traps at different stages of geological exploration. The work deals with the hierarchy of sequential stratigraphic units and the principles of sequencing and parasequences. The essence of the method of sequential stratigraphy is to identify the features of the formation of sedimentary basins and the shelf zone where sedimentation occurred in variable marine, lagoon-continental and continental conditions. The sequencing-stratigraphic method is most efficiently used within the stable (passive) shelves and uncompensated basins of the platforms in the process of detailed study of stratigraphic, lithologic-facial and paleogeographic conditions. It is concluded that the use of this type of stratigraphic analysis makes it possible to build geological models separately for each stage of geological prospecting. At the same time, the regional geological model, built on the basis of sequential stratigraphy, allows to use it after the corresponding additions at the next stage of geological exploration.