鄂尔多斯盆地南部上三叠统延长组层序地层格架内沉积相特征与演化
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摘要
应用高分辨率层序地层学和沉积学的原理与方法,综合岩心、钻井以及测井和地震资料,对鄂尔多斯盆地南部上三叠统延长组进行了深入的研究,识别出5个层序界面,划分出4个三级层序和11个四级层序,建立了鄂尔多斯盆地南部上三叠统延长组层序地层格架。在研究区识别出曲流河三角洲、辫状河三角洲、深水重力流和湖泊4种沉积相。分析了层序格架内沉积相时空展布特征,揭示了层序格架内沉积相的时空演化规律,归纳了层序格架内砂体发育与展布的特点。讨论了层序界线划分与以往地层界的区别及其实际意义,探讨了重力流沉积对鄂尔多斯盆地油气勘探的重大意义。
According to the theory and approach of high resolution sequence stratigraphy and sedimentology,combining with core,drilling well,well-logging and seisimic data,detailed studies has been carried out on the Upper Triassic Yanchang Formation of the southern Ordos Basin.Totally five sequence boundaries,four 3rd and eleven 4th sequences were identified and the sequence stratigraphy framework was built up.Four types of sedimentary facies were developed in this area,including meandering fluvial delta,braided fluvial delta,lacustrine and deep-water gravity flow facies.The characteristic distribution of sedimentary facies in sequence stratigraphic framework was illustrated,and the law of evolution and distribution of sedimentary facies in sequence stratigraphic framework was established and the distribution of sandbodies in sequence stratigraphy was generalized.Taking the constantly deepening understanding of the sedimentary facies as the guidance,great breakthrough has been made in the petroleum exploration of the Yanchang Formation in the Ordos Basin.
According to the theory and approach of high resolution sequence stratigraphy and sedimentology,combining with core,drilling well,well-logging and seisimic data,detailed studies has been carried out on the Upper Triassic Yanchang Formation of the southern Ordos Basin.Totally five sequence boundaries,four 3rd and eleven 4th sequences were identified and the sequence stratigraphy framework was built up.Four types of sedimentary facies were developed in this area,including meandering fluvial delta,braided fluvial delta,lacustrine and deep-water gravity flow facies.The characteristic distribution of sedimentary facies in sequence stratigraphic framework was illustrated,and the law of evolution and distribution of sedimentary facies in sequence stratigraphic framework was established and the distribution of sandbodies in sequence stratigraphy was generalized.Taking the constantly deepening understanding of the sedimentary facies as the guidance,great breakthrough has been made in the petroleum exploration of the Yanchang Formation in the Ordos Basin.
引文
陈飞,樊太亮,高志前,等.2009.鄂尔多斯盆地南部上三叠统延长组物源方向与沉积体系分析[J].西安石油大学学报(自然科学版),24(6):24-28.
党犇,赵虹,李文厚,等.2007.鄂尔多斯盆地陕北地区上三叠统延长组不同级次层序界面的识别[J].中国地质,34(3):414-421.
邓宏文.1995.美国层序地层研究中的新学派——高分辨率层序地层学[J].石油天然气地质,16(2):90-97.
邓秀芹,付金华,姚泾利,等.2011.鄂尔多斯盆地中及上三叠统延长组沉积相与油气勘探的突破[J].古地理学报,13(4):443-455.
樊太亮,吕延仓,丁明华.2000.层序地层体制中的陆相储集层发育规律[J].地学前缘,7(4):315-321.
付金华,郭正权,邓秀芹.2005.鄂尔多斯盆地西南地区上三叠统延长组沉积相及石油地质意义[J].古地理学报,7(1):34-44.
傅强,李益.2006.鄂尔多斯盆地三叠系延长组长8—长7油层组高分辨率层序地层格架及其地质意义[J].现代地质,20(4):579-584.
李凤杰,王多云,宋广寿,等.2004.陕甘宁盆地坳陷型湖盆缓坡带三角洲前缘短期基准面旋回与储集层成因分析[J].沉积学报,22(1):73-78.
刘池洋.2007.叠合盆地特征及油气赋存条件[J].石油学报,28(1):1-7.
宋凯,吕剑文,杜金良,等.2002.鄂尔多斯盆地中部上三叠统延长组物源方向分析与三角洲沉积体系[J].古地理学报,4(3):59-66.
王建民.2006.鄂尔多斯盆地南部中生界大中型油田形成条件与勘探策略[J].石油勘探与开发,33(2):145-149.
王世虎,焦养泉,吴立群,等.2007.鄂尔多斯盆地西北部延长组中下部古物源与沉积体空间配置地[J].地球科学——中国地质大学学报,32(2):201-208.
武富礼,李文厚,李玉宏,等.2004.鄂尔多斯盆地上三叠统延长组三角洲沉积及演化[J].古地理学报,6(3):307-315.
杨斌虎,白海强,戴亚权,等.2008.鄂尔多斯盆地庆阳地区晚三叠世延长期长8沉积期物源与沉积体系研究[J].古地理学报,10(3):251-259.
杨华,刘显阳,张才利,等.2007.鄂尔多斯盆地三叠系延长组低渗透岩性油藏主控因素及其分布规律[J].岩性油气藏,19(3):1-6.
杨俊杰,李克勤,宋国初,等.1992.中国石油地质志(卷四)[M].北京:石油工业出版社,62-67.
杨明慧,刘池洋,郑孟林,等.2007.鄂尔多斯盆地中晚三叠世两种不同类型边缘层序构成及对构造活动响应[J].中国科学(D辑),37(增Ⅰ):173-184.
杨友运.2005.鄂尔多斯盆地南部延长组沉积体系和层序特征[J].地质通报,24(4):369-372.
赵俊兴,李凤杰,申晓莉,等.2008.鄂尔多斯盆地南部长6和长7油层浊流事件的沉积特征及发育模式[J].石油学报,29(3):389-394.
郑荣才,彭军.2002.陕北志丹三角洲长6油层组高分辨率层序分析与等时对比[J].沉积学报,20(1):92-100.
张兴阳,罗平,顾家裕,等.2006.三级基准面旋回内三角洲砂体骨架模型的建立——以陕北安塞三角洲露头为例[J].沉积学报,24(4):540-548.
Cross T A.1993.Applications of high-resolution sequence stratigraphy inpetroleum exploration and production[C].Short Course Notes:Ca-nadian Society of Petroleum Geologists.Calgary,Alberta,August,15:290.
Cross T A.1994.Applications of high-resolution sequence stratigraphy toreservoir analysis[C].The Interstate Oil and Gas Compact Commis-sion.1993Annual Bulletin:24-39.
Emery D,Myers K.1996.Sequence Stratigraphy[M].Oxford,UK:Black-well Science,1-297.
党犇,赵虹,李文厚,等.2007.鄂尔多斯盆地陕北地区上三叠统延长组不同级次层序界面的识别[J].中国地质,34(3):414-421.
邓宏文.1995.美国层序地层研究中的新学派——高分辨率层序地层学[J].石油天然气地质,16(2):90-97.
邓秀芹,付金华,姚泾利,等.2011.鄂尔多斯盆地中及上三叠统延长组沉积相与油气勘探的突破[J].古地理学报,13(4):443-455.
樊太亮,吕延仓,丁明华.2000.层序地层体制中的陆相储集层发育规律[J].地学前缘,7(4):315-321.
付金华,郭正权,邓秀芹.2005.鄂尔多斯盆地西南地区上三叠统延长组沉积相及石油地质意义[J].古地理学报,7(1):34-44.
傅强,李益.2006.鄂尔多斯盆地三叠系延长组长8—长7油层组高分辨率层序地层格架及其地质意义[J].现代地质,20(4):579-584.
李凤杰,王多云,宋广寿,等.2004.陕甘宁盆地坳陷型湖盆缓坡带三角洲前缘短期基准面旋回与储集层成因分析[J].沉积学报,22(1):73-78.
刘池洋.2007.叠合盆地特征及油气赋存条件[J].石油学报,28(1):1-7.
宋凯,吕剑文,杜金良,等.2002.鄂尔多斯盆地中部上三叠统延长组物源方向分析与三角洲沉积体系[J].古地理学报,4(3):59-66.
王建民.2006.鄂尔多斯盆地南部中生界大中型油田形成条件与勘探策略[J].石油勘探与开发,33(2):145-149.
王世虎,焦养泉,吴立群,等.2007.鄂尔多斯盆地西北部延长组中下部古物源与沉积体空间配置地[J].地球科学——中国地质大学学报,32(2):201-208.
武富礼,李文厚,李玉宏,等.2004.鄂尔多斯盆地上三叠统延长组三角洲沉积及演化[J].古地理学报,6(3):307-315.
杨斌虎,白海强,戴亚权,等.2008.鄂尔多斯盆地庆阳地区晚三叠世延长期长8沉积期物源与沉积体系研究[J].古地理学报,10(3):251-259.
杨华,刘显阳,张才利,等.2007.鄂尔多斯盆地三叠系延长组低渗透岩性油藏主控因素及其分布规律[J].岩性油气藏,19(3):1-6.
杨俊杰,李克勤,宋国初,等.1992.中国石油地质志(卷四)[M].北京:石油工业出版社,62-67.
杨明慧,刘池洋,郑孟林,等.2007.鄂尔多斯盆地中晚三叠世两种不同类型边缘层序构成及对构造活动响应[J].中国科学(D辑),37(增Ⅰ):173-184.
杨友运.2005.鄂尔多斯盆地南部延长组沉积体系和层序特征[J].地质通报,24(4):369-372.
赵俊兴,李凤杰,申晓莉,等.2008.鄂尔多斯盆地南部长6和长7油层浊流事件的沉积特征及发育模式[J].石油学报,29(3):389-394.
郑荣才,彭军.2002.陕北志丹三角洲长6油层组高分辨率层序分析与等时对比[J].沉积学报,20(1):92-100.
张兴阳,罗平,顾家裕,等.2006.三级基准面旋回内三角洲砂体骨架模型的建立——以陕北安塞三角洲露头为例[J].沉积学报,24(4):540-548.
Cross T A.1993.Applications of high-resolution sequence stratigraphy inpetroleum exploration and production[C].Short Course Notes:Ca-nadian Society of Petroleum Geologists.Calgary,Alberta,August,15:290.
Cross T A.1994.Applications of high-resolution sequence stratigraphy toreservoir analysis[C].The Interstate Oil and Gas Compact Commis-sion.1993Annual Bulletin:24-39.
Emery D,Myers K.1996.Sequence Stratigraphy[M].Oxford,UK:Black-well Science,1-297.
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