Its oil?gas accumulation rules is different from that of central depression area of Songliao basin.Its oil?gas source rocks are Shahezi formation, Yingcheng formation and Denglouku formation.

• 在部分断层不能成为油气垂向油气通道的条件下 ,油气在烃源层内以横向运移为主 ,形成原生油气藏。