| 珠江口盆地西部珠三坳陷珠江组沉积演化 |
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| 引用本文： | 钟泽红,徐万兴,刘芳,何卫军,王亚辉.珠江口盆地西部珠三坳陷珠江组沉积演化[J].世界地质,2018,37(4):1122. |
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| 作者姓名： | 钟泽红 徐万兴 刘芳 何卫军 王亚辉 |
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| 作者单位： | 中海石油(中国)有限公司湛江分公司, 广东 湛江 524057 |
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| 基金项目： | 国家重大科技专项（2016ZX05024-002-009、2016ZX05024-006）. |
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| 摘 要： | 为了加强珠三坳陷珠江组的油气勘探理论,笔者从层序格架、岩芯特征、有孔虫分布、岩石类型及岩性组合等方面,分析珠三坳陷及周缘珠江组三个层序的沉积特征及沉积演化规律:从S50--S60～S40--S41层序,岩芯特征呈现规律性变化,砂岩粒度减小、分选性增强,水动力条件从强-较强-弱转变;有孔虫丰度变化从零星中低值--连续中高值--连续中值,水深从浅-深-较深,神狐隆起从局部出露到完全沉没。古珠江三角洲及海南隆起—粤桂隆起物源三角洲是S50-S60及S41-S50层序的重点沉积体系。从S50-S60～S40-S41层序,古珠江三角洲规模从"大--中--小"依次演变,海南隆起—粤桂隆起物源三角洲呈"大-大-小/无"变化,浅海迅速扩张,仅半深海分布较稳定。
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| 关 键 词： | 珠江口盆地 珠三坳陷 珠江组 有孔虫 岩石类型 三角洲 |
| 收稿时间： | 2018-03-15 |
| 修稿时间： | 2018-10-08 |
Sedimentary evolution of Zhujiang Formation in Zhu Ⅲ depression,West Pearl River Mouth Basin |
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| ZHONG Ze-hong,XU Wan-xing,LIU Fang,HE Wei-jun,WANG Ya-hui.Sedimentary evolution of Zhujiang Formation in Zhu Ⅲ depression,West Pearl River Mouth Basin[J].World Geology,2018,37(4):1122. |
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| Authors: | ZHONG Ze-hong XU Wan-xing LIU Fang HE Wei-jun WANG Ya-hui |
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| Institution: | Zhanjiang Branch of CNOOC Ltd., Zhanjiang 524057, Guangdong, China |
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| Abstract: | In order to strengthen the theory of oil and gas exploration about Zhujiang Formation in Zhu Ⅲ Depression, the authors analyze the sedimentary characteristics and the evolution regular of three sequences in Zhujiang Formation around Zhu Ⅲ Depression according to sequence framework, core characteristics, distribution of foraminifera, rock types and lithology combination. The results show that the grain sizes of sandstones were decreased and the sorting of sandstones was enhanced by core observation from S50-S60 to S40-S41 sequence. The hydrodynamics was changed from strong to less strong to weak from early to late stages. The abundance of foraminifera changed from fragmentary low-middle, continuous middle-high to continuous middle value. The water depth changed from shallow to deep to less deep. The Shenhu uplift changed from partly exposed to entirely being covered. The ancient pearl river delta and the deltas from Hainan uplift-Yuegui uplift are the main sedimentary systems in S50-S60 and S41-S50 succession. The ancient pearl river delta changed from big, middle to small in scale, and the deltas from Hainan uplift-Yuegui uplift changed from similar big in early 2 stages to small or disappeared in scale from S50-S60 to S40-S41 sequence. Neritic facies expanded rapidly, as bathyal facies kept basically unchanged. |
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| Keywords: | Pearl River Mouth Basin Zhu Ⅲ Depression Zhujiang Formation foraminifera rock types delta |
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