| 西非第三系深水扇沉积特征及发育演化规律 |
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| 作者姓名： | 刘新颖 |
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| 作者单位： | 中海油研究总院,北京,100027 |
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| 基金项目： | 国家"十二五"重大科技专项 |
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| 摘 要： | 以西非主要深水油气产区——下刚果盆地和尼日尔三角洲盆地为样本,分析西非地区典型深水扇的沉积特征、发育演化规律及主控因素.结果表明:受物源供给类型、盆地结构、构造活动及地形、海平面升降等因素影响,两个盆地深水扇体系表现不同特征和演化模式,其中下刚果盆地深水扇体系表现为点物源河流直接供给的大型单扇模式,深水水道及溢岸沉积构成该类型深水扇的主要沉积单元;尼日尔三角洲盆地深水扇为线物源三角洲供给的中型群扇模式,深水沉积单元类型多样.由于沉积物流速和沉积物结构改变,控制重力流流体性质,导致深水扇体沉积特征及储层分布在平面和垂向上发生变化.
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| 关 键 词： | 西非 第三系 深水扇 沉积特征 演化规律 控制因素 |
Depositional characteristics and evolution of the Tertiary deep-water fan in west Africa |
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| Authors: | LIU Xinying |
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| Institution: | LIU Xinying(CNOOC Research Instisut,Beijing 100027,China) |
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| Abstract: | In this paper,the deep water fan of the Lower Congo Basin and the Niger Delta Basin was chosen as the typical sample of West Africa,which is one of the main deep-water oil and gas producing areas in the world.Based on the analysis of developmental evolution and main controlling factors of deep water fan in the two basins,it is known that the two deepwater fan system exhibit different characteristics and evolution mode,affected by the type of source supply,basin structure,tectonic activity and terrain,sea-level fluctuations and other factors.The deep-water fan system in Lower Congo basin shows a mode of point provenance with rivers directly supply and a large single fan,and a Medium-sized group of fans with line provenance supplied by Delta in the Niger Delta basin.Above all,it's changing in the nature of gravity flow of fluid which leading to the plane and vertical change of deepwater fan deposits and reservoir distribution. |
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| Keywords: | west Africa tertiary deep-water fan sedimentary features evolution controlling factors |
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