A mixed-fluid reservoir will stratify according to fluid density, with gas at the top, oil in the middle, and water below.
具有混合流体的储层将会依流体密度分层，气在顶部，油在中部，而水在底部。
Gas may be found either dissolved in reservoir fluids or as free gas that tends to form a gas cap beneath the top seal on the reservoir trap.
气体可能在储层流体中以溶解形式或作为游离气而存在，游离气趋于在储层圈闭的盖层下面形成气顶。
The major volcanic reservoirs are mainly in the effusive facies, and the best reservoir belts are in the gas cavity belts on top and at base of the effusive facies.
火山岩储层主要发育在溢流相，尤其是溢流相顶底部的气孔带是最为有利的储集相带。
The major volcanic reservoirs are mainly in the effusive facies, and the best reservoir belts are in the gas cavity belts on top and at base of the effusive facies.
火山岩储层主要发育在溢流相，尤其是溢流相顶底部的气孔带是最为有利的储集相带。
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