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OALib Journal期刊
ISSN: 2333-9721
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辽河坳陷西部凹陷天然气成因类型与成藏模式
Keywords: 辽河坳陷,天然气,成藏模式,西部凹陷
Abstract:
？通过组分、同位素特征划分天然气成因类型，结合成藏条件对典型气藏进行解剖，探讨辽河西部凹陷不同成因天然气藏的成藏模式。研究认为，西部凹陷天然气以低熟煤成气和原油菌解气为主，分别以双台子地区和高升地区为典型。双台子地区原生气藏主要为东营期(35ma)以来，沙三段中上部泥岩热解的煤成气从原油中出溶，或直接经断层运移至浅部聚集而成。高升地区菌解气藏分布于稠油层上方，主要为东营末期(24ma)以来，原油在生物降解稠化过程中形成的生物气，经短距离运移后就近成藏。
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