Abstract: The occurrence and homogenization temperature of fluid inclusion as well as the fluorescent indicator of organic inclusion from Xiali formation (Middle Jurassic) and Suowa formation (Upper Jurassic) in Longwei area of north Qiangtang basin are analyzed, indicating that the inclusion in this area is of multiple types with braded and banded distribution. The homogeneous temperature is of multiple peak values. The organic inclusion is of characters of blue-white and yellow-green fluorescence. It is believed by combination of the source rock's organic matter evolution and oil source studies that there existed two large-scale processes of hydrocarbon generation, migration and accumulation in late stage of Late Jurassic to early stage of Early Cretaceous and Kangtuo stage of Miocene, respectively.

Key words: North Qiangtang basin, fluid inclusion, homogeneous temperature, hydrocarbon accumulation