STRATIGRAPHIC AND STRUCTURAL PETROLEUM TRAPS IN WESTERN SIBERIA NEOCOMIAN CLINOFORMS
The development of stratigraphic and structural petroleum traps is characteristic of the most clinoforms containing a significant amount of sandstones in some areas of the Western Siberian petroleum basin. The geological nature of these traps is due to the fact that the crystalline base of the plate is not uniform. In our interpretation it consists of terranes of different times of formation and structure, it is obvious that less durable terranes could not withstand the “stamp” of clinoform cyclites and sank under the influence of the latter. As the load moved, inversion of previously sagging areas occurred, which led to partial erosion of the marginal part of the shelf terrace and the formation of tectonically screened hydrocarbon traps from the remaining sandstone formations caused by the manifestation of depressive-inverse tectonics in the marginal parts of the shelf terraces.