• 天然气地质学 • 下一篇
王伟锋,张仲达
Wang Wei-feng,Zhang Zhong-da
摘要: 准噶尔盆地五彩湾地区石炭系烃源岩生烃潜力良好,现今处于成熟—高成熟阶段,已生成大量油气,自二叠纪以来的生烃过程对石炭系油气成藏具有重要影响。对该地区石炭系烃源岩基本特征进行评价,恢复演化历史,开展油气成藏条件分析,进而对油气成藏过程进行研究。结果表明:五彩湾地区石炭系烃源岩具有大规模生成油气的生烃条件,并且经历了多个重要的生烃时期。石炭系经历了多期成藏,分别是二叠纪末期、三叠纪末期、侏罗纪晚期和白垩纪末期。其中,前三者为早期成藏,由于侏罗纪末期—白垩纪早期构造活动,早期形成的油气藏遭受完全破坏,油气散失;白垩纪末期是该地区石炭系烃源岩的最后一次生烃高峰,生成的大量成熟—高成熟油气在石炭系内部储集体中聚集形成现今的油气藏。
中图分类号:
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