The gas-cap oil reservoir is an oil reservoir overtopped with gas phase hydrocarbon that is in a unified hydrodynamic system with the underneath oil deposit and the water body.

• 气顶油藏是表述上方有天然共存的气相烃类蕴藏的油藏,它与下方的油藏和水体处于一个统一的水动力学体系中。