In Himalaya period,the basin was compressed.As Tertiary deposits increased,Jurassic source rocks started secondary hydrocarbon generation, thus resulting in the activation and reconstruction of the petroleum system.

• 燕山运动中晚期，侏罗系大规模冲隆及剥蚀，侏罗系源岩生烃作用终止，含油气系统被破坏。