The vast majority of the
total reserves are found in the Burgan Formation
reservoirs, with the Wara reservoir providing the
next-largest share. Unconfirmed estimates of
probable reserves in Jurassic intervals are reported
to be as high as 13.6 BBO. The Burgan and Wara
oils are light (average 32 oAPI), except in a ~50 ft
zone just above the OWC, where the oil is heavy
and viscous.