金湖凹陷阜宁组二段混合沉积研究
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摘要
金湖凹陷是苏北盆地的主要含油气凹陷,阜宁组二段沉积时期广泛发育陆源碎屑与湖相碳酸盐的混合沉积,结合研究区内岩芯、录井、测井等资料对金湖凹陷阜二段的混合沉积进行了系统研究。其中,金湖凹陷阜二段沉积时期,混合沉积微观上表现为陆源碎屑组分与碳酸盐组分混合沉积形成混积岩,宏观上表现为陆源碎屑岩—碳酸盐岩层系、陆源碎屑岩—混积岩层系、碳酸盐岩—混积岩层系和混积岩层系;混积类型主要发育渐变式和复合式混合沉积,少量发育突变式混合沉积。通过对比分析区域地质背景、岩石学特征、沉积环境等,建立了阜二段混合沉积相模式。对研究区的混合沉积控制因素进行了讨论,认为其主控因素为阜二段沉积时期的海侵作用,同时构造作用、气候条件、湖平面变化、物源等也对研究区混合沉积有重要的影响。
The Jinhu Sag contains the main oil-bearing blocks in the northern Jiangsu Basin,and mixed sediments of terrigenous fragments and lacustrine carbonates are widely developed in the Second Member of the Funing Formation in the Jinhu Sag. This paper describes a systematic study of the mixed sedimentation of the Second Member of the Funing Formation in Jinhu Sag,with cores,mud logging,well logging,and other study area data acquisition methods.This work discovered that,in the sedimentary period of the Second Member of the Funing Formation in Jinhu Sag,the mixed sedimentary rock with the best micro performance was mixosedimentite formed by mixed deposits of terrigenous fragments and carbonate components,and the best macro performance was obtained from a layered system of terrigenous rock-carbonate rock,terrigenous rock-mixosedimentite,carbonate rock-mixosedimentite,and mixosedimentite.The types of mixed deposits include mainly blended mixed deposits,complex mixed deposits,and some saltatory mixed deposits. This paper carefully analyzes the mixed deposits in the study area,including their geological settings,petrological characteristics,and depositional environments,establishes a mixed sedimentation model,and discusses the controlling factors of the mixed deposits. The main controlling factors are the transgressive effects of the Second Member of the Funing Formation. Tectonic action,climatic conditions,lake surface changes,and provenance also have important effects on the mixed deposits in the study area.
The Jinhu Sag contains the main oil-bearing blocks in the northern Jiangsu Basin,and mixed sediments of terrigenous fragments and lacustrine carbonates are widely developed in the Second Member of the Funing Formation in the Jinhu Sag. This paper describes a systematic study of the mixed sedimentation of the Second Member of the Funing Formation in Jinhu Sag,with cores,mud logging,well logging,and other study area data acquisition methods.This work discovered that,in the sedimentary period of the Second Member of the Funing Formation in Jinhu Sag,the mixed sedimentary rock with the best micro performance was mixosedimentite formed by mixed deposits of terrigenous fragments and carbonate components,and the best macro performance was obtained from a layered system of terrigenous rock-carbonate rock,terrigenous rock-mixosedimentite,carbonate rock-mixosedimentite,and mixosedimentite.The types of mixed deposits include mainly blended mixed deposits,complex mixed deposits,and some saltatory mixed deposits. This paper carefully analyzes the mixed deposits in the study area,including their geological settings,petrological characteristics,and depositional environments,establishes a mixed sedimentation model,and discusses the controlling factors of the mixed deposits. The main controlling factors are the transgressive effects of the Second Member of the Funing Formation. Tectonic action,climatic conditions,lake surface changes,and provenance also have important effects on the mixed deposits in the study area.
引文
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[2] Mount J F.Mixing of siliciclastic and carbonate sediments in shallow shelf environments[J].Geology,1984,12(7):432-435.
[3]杨朝青,沙庆安.云南曲靖中泥盆统曲靖组的沉积环境:一种陆源碎屑与海相碳酸盐的混合沉积[J].沉积学报,1990,8(2):59-66.[Yang Chaoqing,Sha Qing’an. Sedimentary environment of the Middle Devonian Qujing Formation,Qujing,Yunnan province:A kind of mixing sedimentation of terrigenous clastics and carbonate[J].Acta Sedimentologica Sinica,1990,8(2):59-66.]
[4]沙庆安.混合沉积和混积岩的讨论[J].古地理学报,2001,3(3):63-66.[Sha Qing’an. Discussion on mixing deposit and Hunji Rock[J].Journal of Palaeogeography,2001,3(3):63-66.]
[5]郭福生,严兆彬,杜杨松,等.混合沉积、混积岩和混积层系的讨论[J].地学前缘,2003,10(3):68.[Guo Fusheng,Yan Zhaobin,Du Yangsong,et al. Discussion on mixing deposit,hunji rock and hunji sequence[J].Earth Science Frontiers,2003,10(3):68.]
[6]董桂玉,陈洪德,何幼斌,等.陆源碎屑与碳酸盐混合沉积研究中的几点思考[J].地球科学进展,2007,22(9):931-939.[Dong Guiyu,Chen Hongde,He Youbin,et al.Some problems on the study of the mixed siliciclastic-carbonate sediments[J]. Advances in Earth Science,2007,22(9):931-939.]
[7]丁玉盛,周巨标,石先达,等.王龙庄油田阜宁组二段碳酸盐岩与碎屑岩混合沉积滩坝体系[J].山东科技大学学报(自然科学版),2015,34(2):58-63,78.[Ding Yusheng,Zhou Jubiao,Shi Xianda,et al.Beach bar system mixed carbonate and siliciclastic sediments in the Second Member of Funing Formation in Wanglongzhuang oilfield[J]. Journal of Shandong University of Science and Technology(Natural Science),2015,34(2):58-63,78.]
[8] El-Azabi M H,El-Araby A. Depositional framework and sequence stratigraphic aspects of the Coniacian-Santonian mixed siliciclastic/carbonate Matulla sediments in Nezzazat and Ekma blocks,Gulf of Suez,Egypt[J]. Journal of African Earth Sciences,2007,47(4/5):179-202.
[9]李祥辉.层序地层中的混合沉积作用及其控制因素[J].高校地质学报,2008,14(3):395-404.[Li Xianghui.Mixing of siliciclasticcarbonate sediments within systems tracts of depositional sequences and its controlling factors[J]. Geological Journal of China Universities,2008,14(3):395-404.]
[10]赵灿,李旭兵,郇金来,等.碳酸盐与硅质碎屑的混合沉积机理和控制因素探讨[J].地质论评,2013,59(4):615-626.[Zhao Can,Li Xubing,Huan Jinlai,et al. Mechanism of mixied siliciclastic-carbonate sediments and its controlling factors[J]. Geological Review,2013,59(4):615-626.]
[11]徐伟,陈开远,曹正林,等.咸化湖盆混积岩成因机理研究[J].岩石学报,2014,30(6):1804-1816.[Xu Wei,Chen Kaiyuan,Cao Zhenglin,et al.Original mechanism of mixed sediments in the saline lacustrine basin[J].Acta Petrologica Sinica,2014,30(6):1804-1816.]
[12]李婷婷,朱如凯,白斌,等.混积岩储层特征:以酒泉盆地青西凹陷下白垩统混积岩为例[J].沉积学报,2015,33(2):376-384.[Li Tingting,Zhu Rukai,Bai Bin,et al.Characteristics of mixed sedimentary reservoir:Taking the Lower Cretaceous mixed sedimentary rock of Qingxi depression in Jiuquan Basin as an example[J].Acta Sedimentologica Sinica,2015,33(2):376-384.]
[13]禚喜准,王琪,张瑞,等.柴达木盆地北缘下干柴沟组下段湖相混合沉积发育特征及其对储层的影响[J].沉积学报,2013,31(4):724-729.[Zhuo Xizhun,Wang Qi,Zhang Rui,et al. The characteristics of lacustrine mixed deposit in lower Xiaganchaigou Formation and its effect on reservoir property:A case in the central areas of northern Qaidam Basin[J]. Acta Sedimentologica Sinica,2013,31(4):724-729.]
[14]陈安定.苏北箕状断陷形成的动力学机制[J].高校地质学报,2001,7(4):408-418.[Chen Anding. Dynamic mechanism of formation of dustpan subsidence,northern Jiangsu[J]. Geological Journal of China Universities,2001,7(4):408-418.]
[15]王良书,施央申,郭令智.苏北盆地地震地质分析与构造演化[J].大地构造与成矿学,1991,15(1):75-82.[Wang Liangshu,Shi Yangshen,Guo Lingzhi.Seismic geohistory analysis in northern Jiangsu Basin[J]. Geotectonica et Metallogenia,1991,15(1):75-82.]
[16]朱建辉,江兴歌,徐旭辉,等.苏北盆地海安凹陷曲塘—李堡地区新生代演化和油气响应评价[J].石油实验地质,2005,27(2):138-143.[Zhu Jianhui,Jiang Xingge,Xu Xuhui,et al.The Cenozoic evolution and petroleum response estimation in the Qutang-Libao region of the Haian depression,the North Jiangsu Basin[J].Petroleum Geology&Experiment,2005,27(2):138-143.]
[17]高炎,李维锋,施小荣.金湖凹陷范庄油田阜宁组层序划分及沉积相分析[J].石油天然气学报(江汉石油学院学报),2008,30(5):225-227.[Gao Yan,Li Weifeng,Shi Xiaorong.The division of sequence and the analysis of the sedimentary facies in Fanzhuang oilfield of Jinhu depression[J]. Journal of Oil and Gas Technology(Journal of Jianghan Petroleum Institute),2008,30(5):225-227.]
[18]王伟锋,杨少春,金强,等.金湖凹陷西园地区阜宁组二段储层的微观特征[J].石油大学学报(自然科学版),1996,20(5):12-16.[Wang Weifeng,Yang Shaochun,Jin Qiang,et al. Reservoir microcharacteristics of MemberⅡin Funing Formation at Xiyuan area of Jinhu sag[J]. Journal of the University of Petroleum,China,1996,20(5):12-16.]
[19]刘金华,唐建东,钟思瑛,等.金湖凹陷西斜坡阜二段湖相碳酸盐岩沉积模式研究[J].沉积学报,2012,30(1):65-72.[Liu Jinhua,Tang Jiandong,Zhong Siying,et al.Sedimentary model of lacustrine carbonate rock in the Second Member of Funing Formation,the West Slope of Jinhu sag[J].Acta Sedimentologica Sinica,2012,30(1):65-72.]
[20]董桂玉,何幼斌,陈洪德,等.惠民凹陷沙一中湖相碳酸盐与陆源碎屑混合沉积:以山东商河地区为例[J].沉积学报,2007,25(3):343-350.[Dong Guiyu,He Youbin,Chen Hongde,et al.Mixed sedimentation of carbonates of lagoonal facies and terrigenous clastics of the middle submember of Member 1 of Shahejie Formation in Huimin sag:Taking Shanghe area in Shandong province for an example[J]. Acta Sedimentologica Sinica,2007,25(3):343-350.]
[21]董桂玉,陈洪德,李君文,等.环渤海湾盆地寒武系混合沉积研究[J].地质学报,2009,83(6):800-811.[Dong Guiyu,Chen Hongde,Li Junwen,et al. The Cambrian mixed sedimentation around Bohai Sea Bay Basin[J]. Acta Geologica Sinica,2009,83(6):800-811.]
[22]张雄华.混积岩的分类和成因[J].地质科技情报,2000,19(4):31-34.[Zhang Xionghua.Classification and origin of mixo sedimentite[J]. Geological Science and Technology Information,2000,19(4):31-34.]
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