The most effective phase of hydrocarbon migration is in the oil phase or free gas phase, which directly forms the reservoirs without changing the phases.
石油以油相运移、天然气以气相运移最为有效,无需相态转变就能直接成藏。
The petroleum migration mainly in an oil phase, as for natural gas migration, it can occur in water-solution, oil-solution, free gas and diffusion phase.
石油运移的相态主要是油相,天然气可以是水溶相、油溶相、气相和扩散相。
The amount of gas released from oil increases from east to west, it can be 12.82% of gas in free phase expelled from source rock, it is important part of gas accumulation in Western Slope.
油溶释放气量可占到源岩游离相天然气排出量的12.82%,应是西部斜坡区天然气成藏的重要组成部分。
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