Prospects of Oil and Gas Potential of the Middle Paleozonic Deposits of Eastern Yakutia from Historical Viewpoint of Geological Development

The article considers the prospects of oil and gas potential of the Middle Paleozoic deposits of Eastern Yakutia. Based on the study of the peculiarities of bitumen content intervals of the Silurian-Devonian deposits of Selennyakhsky block, it was concluded about high oil and gas potential of the domanicoid Middle Paleozoic deposits of the Omulevsky terrain. Under favorable structural and tectonic conditions and immersion to shallow depths, Middle Paleozoic deposits can contain oil and gas deposits to clarify the most promising subsoil areas, the author’s version of the geological development history of Eastern Yakutia is proposed. The diagrams of the completenses of the main sedimentary complexes are compiled: Middle Devonian-Lower Carboniferous, Upper Paleozoic-Lower Mesozoic, Upper Jurassic-Lower Cretaceous and Upper Cretaceous-Cenozoic. Based on the constructed diagrams of the thicknesses of sedimentary complexes and the shown horizontal displacements, the Tastakhsky depression is identified as the most promising territory. It is assumed that there is a section of the Middle Paleozoic rift basin, slightly affected by the collision. Additionally, the prospects of oil and gas potential of the Upper Jurassic-Lower Cretaceous complex of deposits are substantiated and presented.