济阳坳陷民丰洼陷古近系沙河街组三段中亚段沉积相展布与演化
摘要
在地震、测井、录井及岩芯沉积特征研究的基础上,采用单因素分析多因素综合作图法,划分了民丰洼陷沙三段中亚段各个时期沉积体系的展布范围并分析了各沉积体系之间的相互关系。从沉积体系类型来看,研究区主要发育三角洲、扇三角洲和近岸水下扇沉积体系。其中三角洲沉积体系是沉积的主体,包括永安镇三角洲和东营三角洲的一个分支,纵向上可以分为6个期次,从早期到晚期自东向西推进,同时两者之间由于物源供应强度的变化发生侧向的迁移,并最终交汇在一起。扇三角洲和近岸水下扇沉积仅在洼陷北部靠近陈家庄凸起的地区发育,且主要发育在沙三段中亚段的早期。在洼陷的沉积体系中发现了三种不同类型的可容空间转换现象,并对其成因模式进行了总结。
Minfeng sub-sag lies in the southeast of Jiyang Depression,and has super oil-generative and depositional conditions.At present,the degree of lithologic hydrocarbon reservoir exploration is low,so the exploration potential is great.Delta,fan delta and near shore subaqueous fan depositional systems can be found in this area according to the research of seismic,logs and core.Distribution and interaction of depositional systems has been researched based on the identification and analysis of sedimentary feature in the middle of the third Member of Shahejie Formation,Paleogene System(Es 3)in Minfeng sub-sag,using single factor analysis and multifactor comprehensive mapping method. Delta depositional system is the most important one,which can cover the most part of the sub-sag,including Yong' anzhen delta and a part of Dongying delta.It mainly contains delta front and fore-delta sub-facies,and the main rocks are in the fine sandstone,siltstone,and dark mudstone,etc.Underwater distributary channel facies visible trough cross bedding,wedge-shaped cross bedding,wavy bedding and washing-filling sedimentary structure.Lithology cycles generally show the upward fining cycles,logging curve shapes are the bell-shaped and box-shaped.In distributary stream mouth bar,the sandstone are sorted well and tabular cross-bedding,wavy bedding and bimodal cross-bedding can be found.Lithology cycles generally show the backward fining cycles,logging curve shapes are the funnel-shaped or dentelated funnel-shaped.In distributary bay,horizontal beddings and lenticular beddings are the most popular sedimentary structure,also,wave-generated ripples,shell deposition and phytoclasts can be found.The slump turbidity sandstone interlining in the thin mudstone can be found in fore-delta sub-facies.There are some typical deformation structure and liquefaction structure in the core and finger-shaped and bayonet-shaped in the log curves.The delta can be divided into 6 units which means 6 depositional phases according to the lithological changes in the single well and the forward characters of events in the seismic profiles.Three of them on the top partly omission in the east of the sub-sag.The fan delta and near shore subaqueous fan only deposited in the north of sub-sag closed to Chenjiazhuang uplift during earlier stage of Es3.Looking at the sedimentary evolution from building several profiles in different location,we can found a typical phenomenal that the forward and backward occurred in the same time sometimes.There are three different types:in the early stage,delta in the south continually forward while the near shore subaqueous fan in the north backward;in the middle stage,one lobe of Yong'anzhen delta's forward while another backward;in the latter stage,the Yong'anzhen delta forward to the south while the Dongying delta backward to the south.These can be summarized into three kinds of transformation of accommodation space according to the genesis:①the transformation of accommodation space caused by tectonic movement between two different sedimentary systems in different structure layers;②the transformation of accommodation space caused by deposition between two different sedimentary systems in same structure layer;③the transformation of accommodation space caused by deposition between two different parts of a sedimentary system in same structure layer.
Minfeng sub-sag lies in the southeast of Jiyang Depression,and has super oil-generative and depositional conditions.At present,the degree of lithologic hydrocarbon reservoir exploration is low,so the exploration potential is great.Delta,fan delta and near shore subaqueous fan depositional systems can be found in this area according to the research of seismic,logs and core.Distribution and interaction of depositional systems has been researched based on the identification and analysis of sedimentary feature in the middle of the third Member of Shahejie Formation,Paleogene System(Es 3)in Minfeng sub-sag,using single factor analysis and multifactor comprehensive mapping method. Delta depositional system is the most important one,which can cover the most part of the sub-sag,including Yong' anzhen delta and a part of Dongying delta.It mainly contains delta front and fore-delta sub-facies,and the main rocks are in the fine sandstone,siltstone,and dark mudstone,etc.Underwater distributary channel facies visible trough cross bedding,wedge-shaped cross bedding,wavy bedding and washing-filling sedimentary structure.Lithology cycles generally show the upward fining cycles,logging curve shapes are the bell-shaped and box-shaped.In distributary stream mouth bar,the sandstone are sorted well and tabular cross-bedding,wavy bedding and bimodal cross-bedding can be found.Lithology cycles generally show the backward fining cycles,logging curve shapes are the funnel-shaped or dentelated funnel-shaped.In distributary bay,horizontal beddings and lenticular beddings are the most popular sedimentary structure,also,wave-generated ripples,shell deposition and phytoclasts can be found.The slump turbidity sandstone interlining in the thin mudstone can be found in fore-delta sub-facies.There are some typical deformation structure and liquefaction structure in the core and finger-shaped and bayonet-shaped in the log curves.The delta can be divided into 6 units which means 6 depositional phases according to the lithological changes in the single well and the forward characters of events in the seismic profiles.Three of them on the top partly omission in the east of the sub-sag.The fan delta and near shore subaqueous fan only deposited in the north of sub-sag closed to Chenjiazhuang uplift during earlier stage of Es3.Looking at the sedimentary evolution from building several profiles in different location,we can found a typical phenomenal that the forward and backward occurred in the same time sometimes.There are three different types:in the early stage,delta in the south continually forward while the near shore subaqueous fan in the north backward;in the middle stage,one lobe of Yong'anzhen delta's forward while another backward;in the latter stage,the Yong'anzhen delta forward to the south while the Dongying delta backward to the south.These can be summarized into three kinds of transformation of accommodation space according to the genesis:①the transformation of accommodation space caused by tectonic movement between two different sedimentary systems in different structure layers;②the transformation of accommodation space caused by deposition between two different sedimentary systems in same structure layer;③the transformation of accommodation space caused by deposition between two different parts of a sedimentary system in same structure layer.
引文
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3王居峰.陆相断陷盆地陡坡带沉积相类型与沉积演化特征——以东营凹陷民丰地区沙三段、沙四段为例[J].天然气地球科学,2008,19(5):611-617[Wang Jufeng.Sedimentary facies types and e-volution features on steep slope belt in terrestrial fault-depressed basin:A case in Sha3 and 4 Member of Minfeng area in Dongying Depression[J].Natural Gas Geoscience,2008,19(5):611-617]
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5王居峰.东营三角洲——浊积扇高频层序叠加样式与岩性圈闭[J].沉积学报,2005,23(2):303-309[Wang Jufeng.High frequencysequence stacking mode of Dongying delta-turbidite fans and lithologicaltrap[J].Acta Sedimentologica Sinica,2005,23(2):303-309]
6邱桂强,王居峰,李从先.东营凹陷沙三中东营三角洲地层格架与油气勘探[J].同济大学学报,2001,29(10):1195-1199[QiuGuiqiang,Wang Jufeng,Li Congxian.Preliminary study on stratigra-phy architecture of middle-Shasan Dongying delta and its significance tohydrocarbon exploration[J].Journal of Tongji University,2001,29(10):1195-1199]
7王化爱,张建中,张宇,等.陆相断陷盆地三角洲地层划分与对比——以济阳坳陷东营三角洲为例[J].油气地质与采收率,2004,11(3):1-3[Wang Huaai,Zhang Jianzhong,Zhang Yu,et al.Strati-graphic classification and correlation on delta in terrestrial rift basin:Taking Dongying delta in Jiyang Depression as an example[J].Petrole-um Geology and Recovery Efficiency,2004,11(3):1-3]
8 Zhang Shanwen.The application of an integrated approach in explora-tion of lacustrine turbidites in Jiyang Sub-basin,Bohai Bay Basin,Chi-na[J].Journal of Petroleum Science and Engineering,2004,41:67-77
9刘军锷,王天正,许淑芳,等.民丰洼陷沙三中亚段永安镇三角洲沉积特点[J].中国石油大学胜利学院学报,2008,22(2):9-11[Liu June,Wang Tianzheng,Xu Shufang,et al.Sedimentary charac-ters of Yonganzhen delta in the middle of the third member of ShahejieFormation in Minfeng sub-sag[J].Journal of Shengli College China U-niversity of Petroleum,2008,22(2):9-11]
10陈清华,吴孔友,王绍兰.永安镇油田构造特征[J].石油大学学报:自然科学版,1998,22(5):23-25[Chen Qinghua,Wu Kongyou,Wang Shaolan.Structural features and oil-gas accumulation in Yonga-nzhen oilfield[J].Journal of the University of Petroleum,China,1998,22(5):23-25]
11蔡进功,姜秀芳,范存堂.东营盆地始新统沉积体系及盆地演化[J].沉积学报,1995,13(增刊):27-37[Cai Jingong,Jiang Xi-ufang,Fan Cuntang.Basin evolution and distribution of lacustrinesystems in the middle and Upper Eocene,Dongying Basin[J].ActaSedimentologica Sinica,1995,13(Supp.):27-37]
12武法东,陈建渝,刘从印,等.东营凹陷第三纪层序地层格架及沉积体系类型[J].现代地质,1998,12(4):559-566[Wu Fadong,Chen Jianyu,Liu Congyin,et al.Tertiary sequence stratigraphyframework and sedimentary system types in Dongying Depression[J].Geoscience,1998,12(4):559-566]
13冯友良.东营凹陷下第三系层序地层格架及盆地充填模式[J].地质科学,1999,24(6):634-643[Feng Youliang.Lower Tertiary se-quence stratigraphy framework and basin filling model in Dongying de-pression[J].Earth Science,1999,24(6):634-643]
14康仁华,刘魁元,赵翠霞,等.济阳坳陷渤南洼陷古近系沙河街组沉积相[J].古地理学报,2002,4(4):19-28[Kang Renhua,LiuKuiyuan,Zhao Cuixia,et al.Sedimentary facies of the Shahejie For-mation of Paleogene in Bonan sag of Jiyang depression[J].Journal ofPaleogeography,2002,4(4):19-28]
15王居峰.济阳坳陷东营凹陷古近系沙河街组沉积相[J].古地理学报,2005,7(1):45-58[Wang Jufeng.Sedimentary facies of theShahejie Formation of Paleogene in Dongying Sag,Jiyang Depression[J].Journal of Paleogeography,2005,7(1):45-58]
16 Li Sumei,Pang Xiongqi,Li Maowen,et al.Geochemistry of petrole-um systems in the Niuzhuang South Slope of Bohai Bay Basin:Part 4.Evidence for new exploration horizons in a maturely explored petrole-um province[J].Organic Geochemistry,2005,36:1135-1150
17杨勇强,邱隆伟,张博明,等.民丰洼陷古近系沙三中亚段物源体系研究[J].新疆石油地质,2009,30(3):307-310[YangYongqiang,Qiu Longwei,Zhang Boming,et al.The Es3 provenancesystem of Eogene Shahejie Formation in Minfeng Sub-sag[J].Xin-jiang Petroleum Geology,2009,30(3):307-310]
18冯增昭.单因素分析综合作图法——岩相古地理学方法论[J].沉积学报,1992,10(3):70-77[Feng Zengzhao.Single factor analy-sis and comprehensive mapping method:Methodology of lithofaciespaleogeography[J].Acta Sedimentologica Sinica,1992,10(3):70-77]
19冯增昭.单因素分析多因素综合作图法——定量岩相古地理重建[J].古地理学报,2004,6(1):3-19[Feng Zengzhao.Single fac-tor analysis and multifactor comprehensive mapping method--Recon-struction of quantitative lithofacies paleogeography[J].Journal ofPalaeogeography,2004,6(1):3-19]
20 Jiang Zaixing,Lu Hongbo,Yu Wenquan,et al.Transformation of ac-commodation space of the Cretaceous Qingshankou Formation,theSongliao Basin,NE China[J].Basin Research,2005,17:569-582
21刘震,曾宪斌,张万选.构造掀斜对单断湖盆湖平面变化的影响[J].沉积学报,1997,15(4):64-67[Liu Zhen,Zeng Xianbin,Zhang Wanxuan.Profile in sediments in estuaries and its applicationto sedimentology[J].Acta Sedimentologica Sinica,1997,15(4):64-67]
22胡受权.泌阳断陷陡坡带陆相层序发育的可容空间图解探讨[J].高校地质学报,1998,4(3):85-94[Hu Shouquan.On acco-modation diagram of developing mechanics of terrigenous sequence inthe steep slope zone of Biyang fault-depression[J].Geological Journalof China Universities,1998,4(3):85-94]
23杨伟利,姜在兴,操应长,等.陆相断陷盆地可容空间转换特征[J].沉积学报,2009,27(2):299-305[Yang Weili,Jiang Zaixing,Cao Yingchang,et al.The accommodation transition in faulted lakebasin[J].Acta Sedimentologica Sinica,2009,27(2):299-305]
2庄丽.东营凹陷永安镇三角洲层序地层与沉积体系[J].石油实验地质,2006,28(6):544-548[Zhuang Li.Research on the sequencestratigraphy and depositional system in Yonganzhen delta,the DongyingSag[J].Petroleum Geology&Experiment,2006,28(6):544-548]
3王居峰.陆相断陷盆地陡坡带沉积相类型与沉积演化特征——以东营凹陷民丰地区沙三段、沙四段为例[J].天然气地球科学,2008,19(5):611-617[Wang Jufeng.Sedimentary facies types and e-volution features on steep slope belt in terrestrial fault-depressed basin:A case in Sha3 and 4 Member of Minfeng area in Dongying Depression[J].Natural Gas Geoscience,2008,19(5):611-617]
4范代读,邱桂强,李从先,等.东营三角洲的古流向研究[J].石油学报,2000,21(1):29-33[Fan Daidu,Qiu Guiqiang,Li Congxian,etal.Paleocurrent properties of Dongying delta in Bohai Bay Basin[J].Acta Petrolei Sinica,2000,21(1):29-33]
5王居峰.东营三角洲——浊积扇高频层序叠加样式与岩性圈闭[J].沉积学报,2005,23(2):303-309[Wang Jufeng.High frequencysequence stacking mode of Dongying delta-turbidite fans and lithologicaltrap[J].Acta Sedimentologica Sinica,2005,23(2):303-309]
6邱桂强,王居峰,李从先.东营凹陷沙三中东营三角洲地层格架与油气勘探[J].同济大学学报,2001,29(10):1195-1199[QiuGuiqiang,Wang Jufeng,Li Congxian.Preliminary study on stratigra-phy architecture of middle-Shasan Dongying delta and its significance tohydrocarbon exploration[J].Journal of Tongji University,2001,29(10):1195-1199]
7王化爱,张建中,张宇,等.陆相断陷盆地三角洲地层划分与对比——以济阳坳陷东营三角洲为例[J].油气地质与采收率,2004,11(3):1-3[Wang Huaai,Zhang Jianzhong,Zhang Yu,et al.Strati-graphic classification and correlation on delta in terrestrial rift basin:Taking Dongying delta in Jiyang Depression as an example[J].Petrole-um Geology and Recovery Efficiency,2004,11(3):1-3]
8 Zhang Shanwen.The application of an integrated approach in explora-tion of lacustrine turbidites in Jiyang Sub-basin,Bohai Bay Basin,Chi-na[J].Journal of Petroleum Science and Engineering,2004,41:67-77
9刘军锷,王天正,许淑芳,等.民丰洼陷沙三中亚段永安镇三角洲沉积特点[J].中国石油大学胜利学院学报,2008,22(2):9-11[Liu June,Wang Tianzheng,Xu Shufang,et al.Sedimentary charac-ters of Yonganzhen delta in the middle of the third member of ShahejieFormation in Minfeng sub-sag[J].Journal of Shengli College China U-niversity of Petroleum,2008,22(2):9-11]
10陈清华,吴孔友,王绍兰.永安镇油田构造特征[J].石油大学学报:自然科学版,1998,22(5):23-25[Chen Qinghua,Wu Kongyou,Wang Shaolan.Structural features and oil-gas accumulation in Yonga-nzhen oilfield[J].Journal of the University of Petroleum,China,1998,22(5):23-25]
11蔡进功,姜秀芳,范存堂.东营盆地始新统沉积体系及盆地演化[J].沉积学报,1995,13(增刊):27-37[Cai Jingong,Jiang Xi-ufang,Fan Cuntang.Basin evolution and distribution of lacustrinesystems in the middle and Upper Eocene,Dongying Basin[J].ActaSedimentologica Sinica,1995,13(Supp.):27-37]
12武法东,陈建渝,刘从印,等.东营凹陷第三纪层序地层格架及沉积体系类型[J].现代地质,1998,12(4):559-566[Wu Fadong,Chen Jianyu,Liu Congyin,et al.Tertiary sequence stratigraphyframework and sedimentary system types in Dongying Depression[J].Geoscience,1998,12(4):559-566]
13冯友良.东营凹陷下第三系层序地层格架及盆地充填模式[J].地质科学,1999,24(6):634-643[Feng Youliang.Lower Tertiary se-quence stratigraphy framework and basin filling model in Dongying de-pression[J].Earth Science,1999,24(6):634-643]
14康仁华,刘魁元,赵翠霞,等.济阳坳陷渤南洼陷古近系沙河街组沉积相[J].古地理学报,2002,4(4):19-28[Kang Renhua,LiuKuiyuan,Zhao Cuixia,et al.Sedimentary facies of the Shahejie For-mation of Paleogene in Bonan sag of Jiyang depression[J].Journal ofPaleogeography,2002,4(4):19-28]
15王居峰.济阳坳陷东营凹陷古近系沙河街组沉积相[J].古地理学报,2005,7(1):45-58[Wang Jufeng.Sedimentary facies of theShahejie Formation of Paleogene in Dongying Sag,Jiyang Depression[J].Journal of Paleogeography,2005,7(1):45-58]
16 Li Sumei,Pang Xiongqi,Li Maowen,et al.Geochemistry of petrole-um systems in the Niuzhuang South Slope of Bohai Bay Basin:Part 4.Evidence for new exploration horizons in a maturely explored petrole-um province[J].Organic Geochemistry,2005,36:1135-1150
17杨勇强,邱隆伟,张博明,等.民丰洼陷古近系沙三中亚段物源体系研究[J].新疆石油地质,2009,30(3):307-310[YangYongqiang,Qiu Longwei,Zhang Boming,et al.The Es3 provenancesystem of Eogene Shahejie Formation in Minfeng Sub-sag[J].Xin-jiang Petroleum Geology,2009,30(3):307-310]
18冯增昭.单因素分析综合作图法——岩相古地理学方法论[J].沉积学报,1992,10(3):70-77[Feng Zengzhao.Single factor analy-sis and comprehensive mapping method:Methodology of lithofaciespaleogeography[J].Acta Sedimentologica Sinica,1992,10(3):70-77]
19冯增昭.单因素分析多因素综合作图法——定量岩相古地理重建[J].古地理学报,2004,6(1):3-19[Feng Zengzhao.Single fac-tor analysis and multifactor comprehensive mapping method--Recon-struction of quantitative lithofacies paleogeography[J].Journal ofPalaeogeography,2004,6(1):3-19]
20 Jiang Zaixing,Lu Hongbo,Yu Wenquan,et al.Transformation of ac-commodation space of the Cretaceous Qingshankou Formation,theSongliao Basin,NE China[J].Basin Research,2005,17:569-582
21刘震,曾宪斌,张万选.构造掀斜对单断湖盆湖平面变化的影响[J].沉积学报,1997,15(4):64-67[Liu Zhen,Zeng Xianbin,Zhang Wanxuan.Profile in sediments in estuaries and its applicationto sedimentology[J].Acta Sedimentologica Sinica,1997,15(4):64-67]
22胡受权.泌阳断陷陡坡带陆相层序发育的可容空间图解探讨[J].高校地质学报,1998,4(3):85-94[Hu Shouquan.On acco-modation diagram of developing mechanics of terrigenous sequence inthe steep slope zone of Biyang fault-depression[J].Geological Journalof China Universities,1998,4(3):85-94]
23杨伟利,姜在兴,操应长,等.陆相断陷盆地可容空间转换特征[J].沉积学报,2009,27(2):299-305[Yang Weili,Jiang Zaixing,Cao Yingchang,et al.The accommodation transition in faulted lakebasin[J].Acta Sedimentologica Sinica,2009,27(2):299-305]
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