| 鄂尔多斯盆地上三叠统延长组沉积体系特征及演化 |
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| 引用本文： | 蔺宏斌,侯明才,陈洪德,董桂玉. 鄂尔多斯盆地上三叠统延长组沉积体系特征及演化[J]. 成都理工大学学报(自然科学版), 2008, 35(6) |
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| 作者姓名： | 蔺宏斌 侯明才 陈洪德 董桂玉 |
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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;中国石油长庆油田分公司,西安,710021;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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| 基金项目： | 四川省重点学科"构造地质学"建设基金资助项目 |
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| 摘 要： | 在野外剖面观察、岩心描述及测井、测试资料分析的基础上,综合前人研究成果,对鄂尔多斯盆地上三叠统延长组沉积体系的类型、特征进行了详细分析,并深入讨论了鄂尔多斯盆地延长组沉积体系垂向上的演化规律.结果表明: 鄂尔多斯盆地延长组主要发育冲积扇、扇三角洲、河流、河流三角洲、湖泊和湖泊浊积扇六大类沉积体系.长8期湖盆开始形成,主要发育神木-乌审旗、安塞和正宁-合水等三角洲沉积体系;长7期湖盆进一步扩展,三角洲规模萎缩;长6期湖水大面积退缩,三角洲前缘连片,面积最大,东北三角洲前缘已推进至吴旗-甘泉一线,西南缘推进至华池-庆阳一带;长4 5期以浅湖亚相为主;长3、长2期以三角洲平原沉积为主;长1期湖盆继续萎缩至消亡,局部出现沼泽环境.盆地沉积体系的演化,在纵向上构成了五套储盖组合.
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| 关 键 词： | 鄂尔多斯盆地 上三叠统 延长组 沉积体系 |
Characteristics and evolution of the sedimentary system of Upper Triassic Yanchang Formation in Ordos Basin,China |
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| LIN Hong-bin,HOU Ming-cai,CHEN Hong-de,DONG Gui-yu. Characteristics and evolution of the sedimentary system of Upper Triassic Yanchang Formation in Ordos Basin,China[J]. Journal of Chengdu University of Technology: Sci & Technol Ed, 2008, 35(6) |
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| Authors: | LIN Hong-bin HOU Ming-cai CHEN Hong-de DONG Gui-yu |
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| Affiliation: | LIN Hong-bin1,2,HOU Ming-cai1,CHEN Hong-de1,DONG Gui-yu11.Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,China,2.Changqing Oilfield Branch Company of CNPC,Xi'an 710021 |
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| Abstract: | Based on observing outcrops, describing cores and analyzing the data of well logging and tests,as well as labor measurements,this paper analyzes the sedimentary system of the Upper Triassic Yanchang Formation in Basin involving the classification and characteristics of the system,and detailed discusses the rule of vertical evolution of the sedimentary system.The result shows that the depositional system of the Yanchang Formation in Ordos Basin composes of alluvial fans,fluvial deposits,fan deltas, braid del... |
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| Keywords: | Ordos Basin Upper Triassic Yanchang Formation sedimentary system |
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