Features of the forecast of oil and gas potential in the northern part of the West Siberian Plate based on the tectonic dislocation model of the sedimentary cover
In this article, the authors represent a new oil and gas prediction criterion for the territory of the northern part of the West Siberian oil and gas province, based on a quantitative assessment of the degree of dislocations of sedimentary cover sediments. The main mechanism that determines the dislocation of deposits of oil and gas complexes of Western Siberia from the point of view of the authors is the inverse nature of the development of the study area. During the Mesozoic-Cenozoic time, the northern part of the West Siberian Plate experienced an inverse type of tectonic development, which led to the constant transformation of the paleosurfaces of the study area, which created significant geodynamic loads on sediments. The authors emphasize that any rock, which during the geological development underwent a constant change in the direction of tectonic movements, experienced great geodynamic loads. As a result of such impacts, both plicative (folding) and tectonic (disjunctive disturbances) dislocations are observed as consequences. The authors believe that the more intensive the change in direction of tectonic movements occurred, the more sedimentary cover rocks are dislocated. The paper substantiates the relationship between tectonic dislocation due to tectonic inversions and oil and gas potential. The identification of dislocated zones in the plan and section of the sedimentary cover is based on the authors methodology of normalizations of paleotectonic maps. Using this method, the authors constructed a three-dimensional model of the tectonic dislocation parameter of the study area. As a result of the analysis of the constructed model, it was found that giant oil and gas accumulation zones within the northern part of Western Siberia corresponds to zones with a maximum degree of tectonic dislocation, which allows us to use this model to predict oil and gas potential.