| 川东北地区飞仙关组层序—岩相古地理特征和鲕滩预测 |
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| 引用本文： | 郑荣才,罗平,文其兵,徐发波,李瑜,耿威.川东北地区飞仙关组层序—岩相古地理特征和鲕滩预测[J].沉积学报,2009,27(1):1-8. |
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| 作者姓名： | 郑荣才 罗平 文其兵 徐发波 李瑜 耿威 |
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| 作者单位： | 成都理工大学“油气藏地质及开发工程”国家重点实验室 成都 610059 |
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| 摘 要： | 以沉积相和界面识别为依据，将川东北地区下三叠统飞仙关组划分为2个三级层序和6个体系域，在此基础上对飞仙关组层序地层学特征进行了分析，编制了各沉积体系域的层序—岩相古地理图和对鲕滩发育规律进行预测。结果表明:SQ1层序发育期，飞仙关组受持续海侵影响，形成以深水台盆为中心的台盆—台地边缘—开阔—局限—蒸发台地的相带展布格局，以海侵体系域的台地边缘和台内鲕滩最为发育，该体系域也是飞仙关组鲕滩相储层最发育的层位；SQ2层序发育期，受海平面大幅度下降和水循环受限及干旱炎热气候影响，区域沉积格局由开阔台地转化为局限台地，鲕滩逐渐消失，最终进入频繁暴露的蒸发台地环境，以沉积膏云岩为主，为飞仙关组天然气藏极其重要的第一套区域性致密盖层发育层位。
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| 关 键 词： | 川东北 下三叠统飞仙关组 层序地层 岩相古地理 鲕滩 |
| 收稿时间： | 1900-01-01 |
Characteristics of Sequence-based Lithofacies and Paleogeography,and Prediction of Oolitic Shoal of the Feixianguan Formation in the Northeastern Sichuan |
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| ZHENG Rong-cai,LUO Ping,WEN Qi-bin,XU Fa-bo,LI Yu,GENG Wei.Characteristics of Sequence-based Lithofacies and Paleogeography,and Prediction of Oolitic Shoal of the Feixianguan Formation in the Northeastern Sichuan[J].Acta Sedimentologica Sinica,2009,27(1):1-8. |
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| Authors: | ZHENG Rong-cai LUO Ping WEN Qi-bin XU Fa-bo LI Yu GENG Wei |
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| Institution: | State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059 |
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| Abstract: | The Feixianguan Formation of Lower Triassic in the northeast Sichuan can be divided into 2 third-order sequences, six system tracts in terms of sedimentary facies and sequence interfaces. Characteristics of sequence stratigraphy of the Feixianguan Formation are analyzed, sequence-palaeogeography maps compiled and development regularity of oolitic shoal predicted. It is indicated that, during the development of SQ1 sequence, the effect of transgression brings about such distribution framework of facies zones... |
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| Keywords: | Northeastern Sichuan Feixianguan Formation Lower Triassic sequence stratigraphy sedimentary facies and palaeogeography oolitic shoal |
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