Petroleum Migration and Accumulation in Tertiary for Xihu Sag, East China Sea

Xihu sag, East China Sea passed through four superimposed and reformed phases in Tertiary. This paper modeled and analyzed the dynamic process of petroleum migration and accumulation using TSM Basin Modeling System. The result would be summarized as following:1. Regional tectonic movement is closely related with oil and gas migration, 2. Structure reversion of Longjing movement is the key factor and period for oil and gas migration and accumulation, 3. Western slope and central anticlinal zone are main direction of oil and gas migration, 4. Oil and gas could migrate to circumferential zone except Xihu sag.