CHARACTERISTICS OF HYDROCARBON ACCUMULATION IN NORTH SEA BASIN

This study is devoted to the characteristics of hydrocarbon accumulation in North Sea Basin. The result shows that North Sea Basin is an oil-bearing rift basin, characterized by the hydrocarbon distribution pattern of "Oil in the North and Gas in the South". There are several types of oil and gas traps in this basin. In the southern basin, the traps are controlled by the evaporite of Zechstein Formation and the late Cretaceous inversion,while traps in the northern basin are affected by regional extension during Late Jurassic-Early Cretaceous. The genetic types of hydrocarbon accumulation can be basically classified as "new source to old reservoir" and "old source to new reservoir" in North Sea Basin. The plays are typed as "new source to old reservoir" in the southern basin. However, in the northern basin, plays belong to a complex type including both the "new source to old reservoir" and "old source to new reservoir".