南堡凹陷东营组层序地层格架与沉积体系
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摘要
通过对地震、岩心、钻、测井资料综合分析,将东营组划分为1个二级层序、3个三级层序。并根据初次湖泛面和最大湖泛面特征将每个层序进一步划分为低位域、湖侵域和高位域等三个体系域。层序格架和展布受凹陷结构和断裂活动影响,高柳断层以北地区东营组沉积厚度薄,且后期剥蚀严重。南部滩海地区的各层序完整,厚度相对稳定。在层序格架内分析了南堡凹陷东营组的沉积体系,东北部陡坡带以发育水下扇、扇三角洲为主,西北部和南部缓坡带发育三角洲、扇三角洲和辫状河三角洲。层序界面、准层序(组)叠加样式以及沉积体系空间展布均受到构造活动的控制,强构造活动期形成退积式叠加模式,而弱构造活动期对应进积式叠加模式。对层序发育和油气成藏条件分析认为层序1低位域的扇三角洲砂体和层序2中的浊积砂体为寻找岩性油气藏的有利部位。
Comprehensively using the drilling,logging and seismic data,based on the boundary characteristics of the sequence systems tract,sequences of Ed Formation in Paleogene in the area of Nanpu sag were classified.Ed Formations were divided into three sedimentary sequences.By tracing MFS and FFS,lowstand,transgressive and highstand system tracts was ascertained.The basin palaeogeography and fault activity have influenced on framework and distributions of the sequence.On the area of hanging-wall of Gaoliu fault,Ed Formation was thin and eroded hardly,especially in Liuzan region.The centre of sequence thickness was located on Linque sub-sag,thickness is more than 2500m.While on the land,average sequence thickness is 1800m.Depositional systems were analysis on sequence stratigraphic framework.On the slope region in the northeast,alluvial fan and fan-delta were mainly depositional systems.And braided river-delta,fan delta and delta were distributed in the northwest and south slope.Tectonic activities were critical controlling factors on sequence system boundary;stack mode and distribution of deposition system.Strong active fault make retrogradation mode,and inertia fault make progradation.The favorable lithological traps are located mainly on fan-delta in the lowstand system tracts of sequence1 and on turbidite fan in the sequence 2.
Comprehensively using the drilling,logging and seismic data,based on the boundary characteristics of the sequence systems tract,sequences of Ed Formation in Paleogene in the area of Nanpu sag were classified.Ed Formations were divided into three sedimentary sequences.By tracing MFS and FFS,lowstand,transgressive and highstand system tracts was ascertained.The basin palaeogeography and fault activity have influenced on framework and distributions of the sequence.On the area of hanging-wall of Gaoliu fault,Ed Formation was thin and eroded hardly,especially in Liuzan region.The centre of sequence thickness was located on Linque sub-sag,thickness is more than 2500m.While on the land,average sequence thickness is 1800m.Depositional systems were analysis on sequence stratigraphic framework.On the slope region in the northeast,alluvial fan and fan-delta were mainly depositional systems.And braided river-delta,fan delta and delta were distributed in the northwest and south slope.Tectonic activities were critical controlling factors on sequence system boundary;stack mode and distribution of deposition system.Strong active fault make retrogradation mode,and inertia fault make progradation.The favorable lithological traps are located mainly on fan-delta in the lowstand system tracts of sequence1 and on turbidite fan in the sequence 2.
引文
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8朱筱敏.层序地层学[M].山东东营:石油大学出版社,2000[Zhu Xiaomin.Sequence Stratigraphy[M].Dongying Shandong:PetroleumUniversity Press,2000]
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10崔永刚,樊涛,孙昶旭,等.构造对三级层序的控制作用[J].地层学杂志,2007,31(2):179-183[Cui Yonggang,Fan Tao,Sun Changxu,et al.Tectonic controls on third order sequences[J].Jour-nal of Stratigraphy,2007,31(2):179-183]
11林畅松,刘景彦,张英志,等.构造活动盆地的层序地层与构造地层分析——以中国中、新生代构造活动湖盆分析为例[J].地学前缘,2005,12(4):365-374[Lin Changsong,Liu Jingyan,Zhang Zhiying,et al.Sequence stratigraphy and tectonic stratigraphic analy-sis of tectonically active basins:a case study on the Cenozoic-Mesozoic lacustrine basins in China[J].Earth Science Frontiers,2005,12(4):365-374]
12邱桂强,王居峰,张昕,等.东营三角洲沙河街组三段中亚段地层格架初步研究及油气勘探意义[J].沉积学报,2001,19(4):569-574[Qiu Guiqiang,Wang Jufeng,Zhang Xin,et al.Preliminary study on stratigraphy architecture of Middle2Shasan interval of Dongying Delta and its significance to hydrocarbon exploration[J].Acta Sedimentologica Sinica,2001,19(4):569-574]
13朱筱敏,康安,王贵文.陆相坳陷型和断陷型湖盆层序地层样式探讨[J].沉积学报,2003,21(2):283-287[Zhu Xiaomin,Kang An,Wang Guiwen.Sequence stratigraphic models of depression and faulted-down lake basins[J].Acta Sedimentologica Sinica,2003,21(2):283-287]
14张喜林,朱筱敏,钟大康,等.苏北盆地高邮凹陷第三系—上白垩统层序地层格架特征[J].沉积学报,2004,22(3):393-399[Zhang Xilin,Zhu Xiaomin,Zhong Dakang,et al.The character of sequence framework of Tertiary and Upper Cretaceous in Gaoyou Sag,Subei Basin[J].Acta Sedimentologica Sinica,2004,22(3):393-399]
2周海民,魏忠文,曹中宏,等.南堡凹陷的形成演化与油气的关系[J].石油与天然气地质,2000,21(4):345-349[Zhou Haimin,Wei Zhongwen,Cao Zhonghong,et al.Relationship between forma-tion,evolution and hydrocarbon in Nanpu sag[J].Oil&Gas Geology,2000,21(4):345-349]
3周海民,丛良滋.浅析断陷盆地多幕拉张与油气的关系——以南堡凹陷的多幕裂陷作用为例[J].地球科学—中国地质大学学报,1999,24(6):625-629[Zhou Haimin,Cong Liangzi.Polyphase exten-sion and its impact on hydrocarbon accumulation in fault basin:a case study of polyphase rifting in Nanpu depression[J].Earth Science—Journal of China University of Geosciences,1999,24(6):625-629]
4周海民,范文科.高成熟探区深化勘探的潜力与措施——以冀东油田南堡凹陷陆地为例[J].中国石油勘探,2001,6(3):63-70[Zhou Haimin,Fan Wenke.Potential and measurement in highly explored re-gion—a case study of Nanpu Depression[J].Oil Exploration in China,2001,6(3):63-70]
5徐安娜,郑红菊,董月霞,等.南堡凹陷东营组层序地层格架及沉积相预测[J].石油勘探与开发,2006,33(4):437-443[Xu Anna,Zheng Hongju,Dong Yuexia,et al.Sequence stratigraphic framework and sedimentary facies prediction in Dongying Formation of Nanpu Sag[J].PetroleumExploration and Development,2006,33(4):437-443]
6袁选俊,薛叔浩,王克玉.南堡凹陷第三系沉积特征及层序地层学研究[J].石油勘探与开发,1994,21(4):87-94[Yuan Xuanjun,Xue Shuhao,Wang Keyu.Characteristic of sedimentary and stratigraphic framework of Paleaogene in Nanpu Sag[J].Petroleum Exploration and Development,1994,21(4):87-94]
7冯有良,潘元林,郑和荣.东营凹陷中始新统上部——上始新统层序地层模式及其石油地质意义[J].沉积学报,2000,18(3):376-383[Feng Youliang,Pan Yuanlin,Zheng Herong.Top Middle Eogene Upper Eogene sequence model and its petroleum geological signifi-cance,Dongying Sag[J].Acta Sedimentologica Sinica,2000,18(3):376-383]
8朱筱敏.层序地层学[M].山东东营:石油大学出版社,2000[Zhu Xiaomin.Sequence Stratigraphy[M].Dongying Shandong:PetroleumUniversity Press,2000]
9胡宗全.层序地层研究的新思路——构造—层序地层研究[J].现代地质,2004,18(4):549-554[Hu Zongquan.A new method for se-quence stratigraphy study:structure-sequence research[J].Geosci-ence,2004,18(4):549-554]
10崔永刚,樊涛,孙昶旭,等.构造对三级层序的控制作用[J].地层学杂志,2007,31(2):179-183[Cui Yonggang,Fan Tao,Sun Changxu,et al.Tectonic controls on third order sequences[J].Jour-nal of Stratigraphy,2007,31(2):179-183]
11林畅松,刘景彦,张英志,等.构造活动盆地的层序地层与构造地层分析——以中国中、新生代构造活动湖盆分析为例[J].地学前缘,2005,12(4):365-374[Lin Changsong,Liu Jingyan,Zhang Zhiying,et al.Sequence stratigraphy and tectonic stratigraphic analy-sis of tectonically active basins:a case study on the Cenozoic-Mesozoic lacustrine basins in China[J].Earth Science Frontiers,2005,12(4):365-374]
12邱桂强,王居峰,张昕,等.东营三角洲沙河街组三段中亚段地层格架初步研究及油气勘探意义[J].沉积学报,2001,19(4):569-574[Qiu Guiqiang,Wang Jufeng,Zhang Xin,et al.Preliminary study on stratigraphy architecture of Middle2Shasan interval of Dongying Delta and its significance to hydrocarbon exploration[J].Acta Sedimentologica Sinica,2001,19(4):569-574]
13朱筱敏,康安,王贵文.陆相坳陷型和断陷型湖盆层序地层样式探讨[J].沉积学报,2003,21(2):283-287[Zhu Xiaomin,Kang An,Wang Guiwen.Sequence stratigraphic models of depression and faulted-down lake basins[J].Acta Sedimentologica Sinica,2003,21(2):283-287]
14张喜林,朱筱敏,钟大康,等.苏北盆地高邮凹陷第三系—上白垩统层序地层格架特征[J].沉积学报,2004,22(3):393-399[Zhang Xilin,Zhu Xiaomin,Zhong Dakang,et al.The character of sequence framework of Tertiary and Upper Cretaceous in Gaoyou Sag,Subei Basin[J].Acta Sedimentologica Sinica,2004,22(3):393-399]
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