Geology and Petroleum Resources of Basins in the Asian Arctic and Offshore East Greenland

摘要

The region discussed contains 15 or 16 almost unexplored sedimentary basins. This report considers the tectonic framework and history of development of the basins, the stratigraphy and facies of their sedimentary filling, and their petroleum geology. Emphasis is put on the main factors controlling oil and gas productivity, such as the quality and maturity of potential source rocks, the presence and quality of reservoir rocks and regional seals, and the availability and expected structural style of traps. As many as nine sedimentary basins are distinguished on the shelf of East Siberia. Two of the basins, South Laptev and Novosibirsk, are filled with Paleozoic-Mesozoic rocks. Others are filled with Cretaceous and Tetiary sediments. The most probable amounts of undiscovered petroleum resources in all these offshore basins are estimated at 5.8 x 10 exp 9 bbl of oil and 70.9 x 10 exp 12 ft exp 3 of gas. The onshore Yenisey-Lena basin possesses good potential (most probably 7.4 x 10 exp 9 bbl of oil and 95.1 x 10 exp 12 ft exp 3 of gas), whereas the Indigirka-Zyryanka basin is estimated to be rather poor (0.5 x 10 exp 9 bbl and 9.5 x 10 exp 12 ft exp 3 ). The offshore South Kara subbasin is a continuation of the West Siberian basin. It is potentially very rich, with most probable undiscovered resources of 5.7 x 10 exp 9 bbl of oil and 163.8 x 10 exp 12 ft exp 3 of gas. Basins of the East Greenland shelf probably contain undiscovered resources of 4.3 x 10 exp 9 bbl of oil and 24.1 x 10 exp 12 ft exp 3 of gas. 107 references, 21 figures, 6 tables. (ERA citation 09:027844)