摘要

Erlian basin is an important production base in north China. The controlling factors and accumulation pattern in Tanan sag is not clear. The author summarizes the main controlling factors of hydrocarbon accumulation in the control Tanan sag, and establish the accumulation mode, enriching the theory of hydrocarbon accumulation is of great significance. The Aershan formation is the main resource rock and the Tengger formation is the main reservoir. There are transporting along the unconformity surface accumulation mode, vertical transporting accumulation along the fault mode and lenticular sandstone reservoiring within the source mode.