| 珠江口盆地惠州凹陷烃源岩发育的主控因素分析 |
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| 作者姓名： | 马宁 侯读杰 施和生 朱俊章 |
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| 作者单位： | 中国地质大学(北京)能源学院;中国地质大学(北京)海相储层演化与油气富集机理教育部重点实验室;中海石油(中国)有限公司深圳分公司 |
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| 基金项目： | 国家自然科学基金项目(40972097) |
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| 摘 要： | 根据烃源岩地球化学、岩石学、沉积学等特征,分析惠州凹陷2套烃源岩的地球化学特征及烃源岩发育的主控因素.结果表明:文昌组中深湖相烃源岩形成于缺氧的还原环境,母质输入主要为低等水生生物和菌藻类,生烃潜力较好;恩平组河沼相煤系泥岩母质输入以陆源高等植物为主,生油潜力不及文昌组中深湖相泥岩;文昌组时期的表层水中浮游植物繁盛和湖底贫氧环境有利于优质烃源岩的形成,同时烃源岩的非均质性受沉积相和基准面旋回升降变化的控制,在最大湖泛面附近容易形成优质烃源岩.
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| 关 键 词： | 优质烃源岩 浮游藻类 孢粉相 微量元素 惠州凹陷 |
Analysis of the main controlling factors of source rocks of Huizhou sag in the Pearl River Mouth Basin |
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| Authors: | MA Ning HOU Du-jie SHI He-sheng ZHU Jun-zhang |
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| Institution: | 1.School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083,China;2.The Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism,Ministry of Education,China University of Geosciences(Beijing),Beijing 100083,China;3.Shenzhen Branch of CNOOC Ltd.,Guangzhou 510240,China) |
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| Abstract: | According to the characteristics of geochemistry,petrology,sedimentology in source rocks,geochemical characteristics of the two sets of source rocks in Huizhou sag and the main controlling factors of high-quality hydrocarbon source rocks were comprehensively analyzed.The results show that the deep lacustrine source rocks in the Wenchang Formation which was formed in anoxic reducing environment have low aquatic organisms and algae input and good hydrocarbon potential.The River marsh coalmudstone in Enping Formation has terrigenous higher plants input,its oil-generating potential is less than the deep-lacustrine mudstone in the Wenchang Formation.Surface water was phytoplankton flour-ish and lakes had oxygen-poor environment in the Wenchang period,which conducive to the formation of high-quality source rocks.The heterogeneity of the source rocks were controlled by the change of con-trol of the movements of sedimentary facies and base-level cycles,it is easy to form high-quality source rocks near the maximum flooding surface. |
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| Keywords: | quality source rocks planktonic algae palynofacies trace elements Huizhou sag |
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