Laptev Oil- and Gas-Bearing Basin (OGB)
Laptev Oil- and Gas-Bearing Basin (OGB) – occupies almost the entire shelf of the Laptev Sea. Geophysical studies confirm the existence of sedimentary deposits, defined as OGB. It was formed on the large Laptev Plate, built by rocks of the Mesozoic–Cenozoic age. Signs of oil and gas in them were identified in the wells drilled on the coast of the bays of Khatanga and Olenyok. In the rock outcrops on the coast, there are numerous oil shows, including the largest deposit of asphalts (the Olenyok River). The highly promising target for the search of oil and gas in the Laptev OGB is the extensive Trofimovskiy uplift, located on the northern coast of the Lena River delta and occupying part of the delta and the seawaters. Probably, it is complicated by a number of individual oil traps, forming a large tectonic structure of the type of a tectonic rampart or a structural high in which oil and gas deposits may merge into one giant field. The possibility of drilling deep wells on the banks of river branches of the Lena’s delta creates favorable conditions for rapid search and exploration in the southern part of the uplift.