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"Comparative Analysis of Hydrocarbon Generation by Probable Source Rocks in the Deep and Uplifted Parts of the East Barents Basin: Results from Basin Modeling"статья
- Авторы: Galushkin Yu I., Yakovlev G.E., Sitar K.A.
- Сборник: AAPG 3P Arctic Polar Petroleum Potential Conference & Exhibition, Stavanger, Norway, October 15- 18, 2013,
- Серия: Search and Discovery Article #10566 (2014), Posted January 27, 2014
- Год издания: 2014
- Первая страница: 1
- Последняя страница: 33
- Аннотация: For assessment of oil-gas perspective of the East Barents region, we compared the thermal and HC generation histories of the Paleozoic, Mesozoic and Cenozoic sedimentary rocks in the South Barents depression with the histories of the Admiralteyskoe rise. Our analysis is based on numerical modeling in the frame of the GALO basin modeling system, which was carried out for Krestovaya, Admiralteyskaya and Pachtusova areas in the Admiralteyskoe rise, for Ludlovskaya, Ledovaya, Shtokmanovskaya, Arkticheskaya areas in the South Barents depression. Evolution of the lithosphere in the South Barents depression includes the continental rifting in the Devonian and considerable thinning of the crust in the Permian and Triassic (β ≈ 2), associated with intensive sedimentation. Radioactive heat of thick sedimentary cover contributes sufficiently in recent heat flow of the region. The modeling suggests more intensive thermal activation of the lithosphere in the northern areas that in the southern ones. It corresponds to increase in present-day heat flow toward the North. According to the modeling, liquid hydrocarbons generated by the Ordovician, Silurian and Devonian deposits in the Admiralteyskaya and Pachtusova areas and by Devonian, Permian and considerable part of Triassic rocks in the South Barents depression were subjected (perhaps, partly) to secondary creaking. The Carboniferous, Permian and Lower Triassic rocks at the depths of 1,000 - 3,600 m in the present-day section of Admiralteyskaya and Pachtusova areas are predominantly oil generating, whereas deeper horizons can be considered as gas prone. In the recent sections of the Ledovaya, Shtokmanovskaya and Arkticheskaya areas, the rocks at the depths of 2,500 - 4,200 m are oil prone. Thus, sufficient part of the Permian-Triassic deposits in center of the South Barents depression occurs within the gas generation zone. Migration of gas hydrocarbons toward the East can be reason of movement of oil accumulations to the same direction. Formation of secondary oil and gas deposits can be caused also due to step-rising migration of hydrocarbons along the tectonic dislocations in the eastern slope of the Admiralteyskoe rise.
- Добавил в систему: Галушкин Юрий Иванович