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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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四川盆地海相层系天然气成因类型与tsr改造沥青证据
Keywords: 四川盆地,海相层系,天然气成因,固体沥青,tsr改造
Abstract:
？？？？？？？？通过对四川盆地海相层系天然气组分和碳同位素以及储层固体沥青元素分析，四川盆地海相层系天然气地球化学特征不同于我国典型煤成气，而与油型气相似，热演化程度普遍很高，已处于油气裂解阶段。烷烃气碳同位素组成普遍存在局部倒转现象，即δ13c1>δ13c2<δ13c3。造成烷烃气碳同位素倒转的原因可能是后期热化学硫酸盐还原反应（tsr）改造;四川盆地海相层系储层沥青元素与陆相碎屑岩明显不同;在川东北地区非海相砂岩中储层固体沥青贫s并具有较低反射率；而海相层系固体沥青中富s。海相层系固体沥青主要为原油热裂解和tsr共同作用产生的，而陆相则仅为原油裂解产生。
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