珠江口盆地文昌B凹陷及周边油气成藏特征与有利勘探领域

张迎朝; 陈志宏; 李绪深; 徐新德; 李琦

doi:10.11781/sysydz201103297

珠江口盆地文昌B凹陷及周边油气成藏特征与有利勘探领域

doi: 10.11781/sysydz201103297

1.
中国地质大学资源学院, 武汉430074
2. 中国海洋石油总公司湛江分公司研究院, 广东湛江524057
3. 中国海洋石油总公司湛江分公司研究院, 广东湛江524057
4. 中国地质大学, 北京100083

基金项目: 国家科技重大专项项目(2008ZX05023-01)资助

详细信息

作者简介:
张迎朝(1971- ),男,博士,高级地质师,主要从事南海油气勘探、科研工作.E-mail:zhangyingzh@cnooc.com.cn.

中图分类号: TE122.3
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出版历程
- 收稿日期: 2011-01-18
- 修回日期: 2011-04-09
- 刊出日期: 2011-06-28

Petroleum accumulation characteristics and favorable exploration directions in Wenchang B Sag and its surrounding areas, Pearl River Mouth Basin

1.
China University of Geosciences, Wuhan, Hubei 430074, China
2. Research Institute of Zhangjiang Branch Company, CNOOC, Zhanjiang, Guangdong 524057, China
3. China University of Geosciences, Beijing 100083, China

摘要

摘要: 利用烃源岩分析、油—源对比和成藏综合分析等技术,研究了文昌B凹陷及周边的油气来源和成藏历程,阐明了不同区带的主力烃源岩与油气成藏特征,深化了油气成藏主控因素认识,提出了有利油气勘探方向。研究认为,文昌B凹陷文昌组浅湖相烃源岩是凸起区成藏的主要贡献者,是该区除众所周知的中深湖相优质烃源岩外的另一种优质烃源岩。南断裂带下降盘文昌组湖相烃源岩沉积期末经历了构造反转抬升,具有"延迟生排油、多期持续油充注"的成藏过程,三号断裂带下降盘具有"早期生排油、多期油气充注"的成藏过程。良好的文昌组湖相烃源岩、多幕式断裂活动、多套区域性优质储盖组合是该区复式油气成藏的主控因素。提出文昌B凹陷反转陡坡带、北斜坡中深层古近系、琼海凸起珠江组一段上部是有利油气勘探方向。
- 浅湖相烃源岩 /
- 成藏过程 /
- 成藏主控因素 /
- 勘探方向 /
- 文昌B凹陷及周边 /
- 珠江口盆地
Abstract: Based on source rock analysis,oil—source correlation and accumulation comprehensive analysis,oil source and accumulation process in the Wenchang B Sag and its surrounding areas were studied.Main source rock and hydrocarbon accumulation features in different regions were illustrated.Main controlling factors of hydrocarbon accumulation and favorable exploration directions were pointed out.Sha-llow lacustrine source rock of the Wenchang Formation in the Wenchang B Sag was the main contributor for accumulation in uplifting region besides the well-known middle—deep lacustrine source rock.At the end of deposition,lacustrine source rock of the Wenchang Formation in the downthrow of southern fault experienced tectonic inversion,resulting in the delay of oil generation and expulsion as well as the multi-stages of oil charging.The downthrow of fault No.3 was also characterized by early oil generation and expulsion as well as multi-stages of oil charging.Favorable lacustrine source rock of the Wenchang Formation,multi-stages of fault activities and sets of reservoir—caprock assemblages worked as the main controlling factors for hydrocarbon accumulation.Favorable exploration directions were pointed out,including the inverse abrupt slope and the middle—deep buried Paleogene of the northern slope in the Wenchang B Sag as well as the first member of Zhujiang Formation in the Qionghai uplift.
- shallow lacustrine source rock /
- accumulation process /
- main controlling factors for accumulation /
- exploration direction /
- Wenchang B Sag and its surrounding areas /
- Pearl River Mouth Basin

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参考文献(14)

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