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.
Guantao gascapreservoir of KD34 block is located in neritic area of Shengli petroliferous province, and its gas formations can't perform systematic well testing on production platform.
垦东34块馆上段气顶油藏位于胜利油气区极浅海海域，矿场无稳定试井资料。
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Gas may be found either dissolved in reservoir fluids or as free gas that tends to form a gascap beneath the top seal on the reservoir trap.