| 川东—渝北地区飞仙关组层序-岩相古地理特征 |
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| 引用本文： | 戴荔果 郑荣才 李,爽 郑,超,胡忠贵.川东—渝北地区飞仙关组层序-岩相古地理特征[J].中国地质,2009,36(1):110-119. |
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| 作者姓名： | 戴荔果 郑荣才 李 爽 郑 超 胡忠贵 |
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| 作者单位： | 1. 成都理工大学"油气藏地质及开发工程"国家重点实验室,四川,成都,610059
2. 中国石油西南油气田分公司重庆气矿,重庆,400021 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，国家自然科学基金 |
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| 摘 要： | 以沉积相分析和层序界面识别为依据,将川东-渝北地区下三叠统飞仙关组划分为2个三级层序(SQ1和SQ2)和6个体系域,编制各沉积体系域的层序-岩相古地理图.研究表明,SQ1层序时期,研究区受晚二叠世长兴末期的区域构造抬升影响,属于区域性缓慢海进-缓慢海退沉积旋回的产物,一度开阔深水的台盆逐渐变浅而转化为开阔台地沉积环境,台地边缘与台内鲕滩的沉积相分异和沉积作用十分活跃,是形成飞仙关组鲕滩储层的主要时期,尤以海侵期鲕滩最为发育;SQ2层序发育期,受海平面大幅度下降、水循环受限和干旱炎热气候的影响,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最重要的第一套区域性致密盖层发育层位.
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| 关 键 词： | 下三叠统飞仙关组 层序-岩相古地理 鲕滩 储层 川东-渝北地区 |
Sequence-based lithofacies and paleogeography of Lower Triassic Feixianguan Formation in eastern Sichuan and northern Zhongqing area |
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| DAI Li-guo,ZHENG Rong-cai,LI Shuang,ZHENG Chao,HU Zhong-gui.Sequence-based lithofacies and paleogeography of Lower Triassic Feixianguan Formation in eastern Sichuan and northern Zhongqing area[J].Chinese Geology,2009,36(1):110-119. |
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| Authors: | DAI Li-guo ZHENG Rong-cai LI Shuang ZHENG Chao HU Zhong-gui |
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| Institution: | 1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation;Chengdu University of Technology;Chengdu 610059;Sichuan;China;2.Chongqing Gas District of Southwest Oil and Gas Company of CNPC;Chongqing 400021;China |
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| Abstract: | The Lower Triassic Feixianguan Formation in northeast Sichuan can be divided into two third-order sequences and six system tracts in terms of sedimentary facies and sequence interfaces.Characteristics of sequence stratigraphy of the Feixianguan Formation were analyzed and sequence-palaeogeography maps were compiled.It is indicated that,influenced by regional tectonic uplifting of the Late Permian Changxing Stage in the study area during the development of SQ1 sequence,the product was formed in a regional sl... |
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| Keywords: | Feixianguan Formation Lower Triassic sequence stratigraphy sedimentary facies and palaeogeography oolitic bank eastern Sichuan-northern Chongqing area |
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