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本文在深入研究泥岩盖层封闭游离相天然气机理及其能力演化的基础上，通过泥岩盖层毛细管（或压力）封闭能力形成时期与气源岩大量排气期的匹配关系，分析研究了对泥岩盖层封闭游离相天然气有效性及其主要类型，提出一套研究泥岩盖层封闭游离相天然气有效性的方法，其应用结果证明了此方法的可行性，同时阐明了泥岩盖层封闭游离相天然气有效性在天然气藏形成中的重要意义。
Based on the deep research on the mechanism and capability evolution of the closed-phase natural gas in mudstone caprock, the paper studies the relationship between the formation of capitals capillaries (or pressure) A method to study the effectiveness of closed-phase natural gas in mudstone caprock is put forward. The application results prove the feasibility of this method. At the same time, it is clarified that mudstone capped closed-phase natural gas The significance of effectiveness in the formation of natural gas reservoirs.