南堡凹陷东营组高精度层序地层格架及沉积体系分析
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摘要
在高分辨率三维地震、钻井以及大量地质资料研究基础上,根据层序地层界面特征,将南堡凹陷东营组划分为1个二级层序和4个三级层序。以初始洪泛面和最大洪泛面识别特征为依据,进一步将三级层序划分出体系域。通过层序地层格架特征及其发育位置分析,认为柳南次凹层序地层格架发育的主控因素为构造、物源和湖平面变化。应用层序地层学原理及南堡凹陷沉积充填背景研究,认为柳南次凹的沉积体系类型为冲积扇、扇三角洲、水下扇、重力流及湖泊沉积体系。冲积扇及水下扇体系在低位体系域中发育,高位体系域中扇三角洲体系和重力流发育,湖扩体系域中湖泊体系非常发育。
Based on comprehensive analysis of high resolution 3D seismic,well and lots of geological data and characteristics of sequences boundaries,Dongying Formation could be divided into 1 first-order sequence,2 second-order sequences and 4 third-order sequences.Then sequence composition is analyzed and the system tracts are identified,finally the regional third-order sequence model is established.According to sequence framework analysis,we find that master control factors are tectonism,provenance and lacustrine water level change.Sequence stratigraphic and geological setting analysis indicates that sedimentary facies of Liunan sag include five types: alluvial fan,fan delta,subaqueous fan,gravity flow,and lake system.Alluvial fan and subaqueous fan develop in LST,fan delta and gravity flow develop in HST,and lake system develop in EST.
Based on comprehensive analysis of high resolution 3D seismic,well and lots of geological data and characteristics of sequences boundaries,Dongying Formation could be divided into 1 first-order sequence,2 second-order sequences and 4 third-order sequences.Then sequence composition is analyzed and the system tracts are identified,finally the regional third-order sequence model is established.According to sequence framework analysis,we find that master control factors are tectonism,provenance and lacustrine water level change.Sequence stratigraphic and geological setting analysis indicates that sedimentary facies of Liunan sag include five types: alluvial fan,fan delta,subaqueous fan,gravity flow,and lake system.Alluvial fan and subaqueous fan develop in LST,fan delta and gravity flow develop in HST,and lake system develop in EST.
引文
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[2]齐井顺,李广伟,孙立东,等.徐家围子断陷白垩系营城组四段层序地层及沉积相[J].吉林大学学报:地球科学版,2009,39(6):983-990.QI Jing-shun,LI Guang-wei,SUN Li-dong,et al.Theresearch on sequence stratigraphy and sedimentary faciesof the Member 4 of Yingcheng Formation in Xujiaweizidepression[J].Journal of Jilin University:Earth Sci-ence Edition,2009,39(6):983-990.
[3]曹瑞成,李军辉,卢双舫,等.海拉尔盆地呼和湖凹陷白垩系层序地层特征及沉积演化[J].吉林大学学报:地球科学版,2010,40(3):535-541.CAO Rui-cheng,LI Jun-hui,LU Shuang-fang,et al.Se-quence stratigraphic character and sedimentary evolutionin Cretaceous in Huhehu depression in Hailaer basin[J].Journal of Jilin University:Earth Science Edition,2010,40(3):535-541.
[4]孔庆莹,程日辉,胡艳飞.周口坳陷谭庄—沈丘凹陷早白垩世沉积相类型和层序地层特征[J].吉林大学学报:地球科学版,2006,36(4):557-562.KONG Qing-ying,CHENG Ri-hui,HU Yan-fei.Types ofsedimentary facies and sequence stratigraphy,Early Cre-taceous in Tanzhuang-Shenqiu depression of Zhoukou sag[J].Journal of Jilin University:Earth Science Edition,2006,36(4):557-562.
[5]冯有良,周海民,李思田,等.陆相断陷盆地层序类型与隐蔽油气藏勘探:以南堡凹陷古近系为例[J].地球科学:中国地质大学学报,2004,29(5):603-608.FENG You-liang,ZHOU Hai-min,LI Si-tian,et al.Se-quence types and subtle trap exploration in continental riftbasin:a case study of Lower Tertiary of the Nanpu de-pression[J].Earth Science:Journal of China Universityof Geosiences,2004,29(5):603-608.
[6]周海民.小型断陷盆地油气勘探理论与实践[M].北京:石油工业出版社,2001:257-313.ZHOU Hai-min.Exploration theory and practices of rift-subsidence basin[M].Beijing:Petroleum IndustryPress,2001:257-313.
[7]冯有良.断陷盆地层序格架中岩性地层油气藏分布特征[J].石油学报,2005,26(4):17-22.FENG You-liang.Distribution of stratigraphic and litho-logic reservoirs in sequence framework of rift-subsidencebasin[J].Acta Petrolei Sinica,2005,26(4):17-22.
[8]李思田,潘元林,陆永潮,等.断陷湖盆隐蔽油藏预测及勘探的关键技术:高精度地震勘探预测基础上的层序地层学研究[J].地球科学:中国地质大学学报,2002,27(5):592-598.LI Si-tian,PAN Yuan-lin,LU Yong-chao,et al.Keytechnology of prospecting and exploration of subtle trapsin lacustrine fault basins:sequence stratigraphic resear-ches on the basis of high resolution seismic survey[J].Earth Science:Journal of China University of Geosci-ences,2002,27(5):592-598.
[9]Vail P R,Mitchum R M.Seismic stratigraphy and globalchanges in sea level,part 1:overview[C]//Payton C E.Seismic stratigraphy:application to hydrocarbon explora-tion.Tulsa:America Association of Petroleum Geologist,Memoir 26,1977:51-212.
[10]蔡希源,李思田.陆相盆地高精度层序地层学隐蔽油气藏勘探基础、方法与实践[M].北京:地质出版社,2003:150-212.CAI Xi-yuan,LI Si-tian.High resolution sequence stra-tigraphy of continental basins:basin ideas,methologhyand practice for exploring subtle oil pools[M].Beijing:Geological Publishing House,2003:150-212.
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