Permian Oil in Xinguang bulge was mainly from Permian P1f source rock.
Permian oil in the Chepaizi area was mostly from Permian P2w source rock.
Xinguang Permian oils have higher thermal maturation than those from Chepaizi.
Two main petroleum chargings were recorded by fluid inclusion and fluorescence.
Laumontite has a considerable effect on the reservoir properties.