SHALLOW BRAIDED DELTAIC SYSTEM IN ENPING FORMATION OF HUIZHOU DEPRESSION,PEARL RIVER MOUTH
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摘要: 珠江口盆地惠州凹陷恩平组广泛发育浅水湖泊,然而长期被认为是断陷湖盆的沉积充填模式。通过岩性组合、地球物理响应特征、古生物组合、地球化学指标、砂岩粒度特征等方面的综合分析,论证了在惠州凹陷恩平组沉积时期湖盆广阔平缓,湖泊淤浅,陆源供应充足,证实了在这种沉积背景下,发育浅水辫状河三角洲沉积体系。该体系具有三角洲平原、辫状河道极其发育,而河口坝等反旋回序列不发育等特征,该体系的提出揭示了研究区断拗转换期湖盆广、薄煤层发育、砂体分布广、沉降速率高、碎屑颗粒粗等沉积特色,与前人探讨的惠州凹陷恩平组的沉积面貌完全不同,为惠州凹陷古近系的勘探提供了新的理论和思路。Abstract: Shallow lacustrine deposits are widely distributed in the Enping Formation of the Huizhou depression of the Pearl River Mouth Basin,and has long been considered as a kind of infilling of a faulted basin.Through the study of lithology,geophysical responses,paleontology,geochemical proxies,and grain size distribution,this paper confirms that a special delta,shallow braided river delta,was developed in the Enping Formation of the Huizhou depression in a broad shallow flat lake,with sufficient terrigenous deposits.And this system is characterized by a well-developed delta plain,an undeveloped coarsening-upwards sequence of a mouth bar,and a well-developed braided stream.Depositional features of shallow braided delta are widely observed,such as the lacustrine deposits formed in the fault-sag transition stage,wide-spread thin coal seam,high sedimentation rate,widely distributed sand body,and coarse deposits in the research area,totally different with the depositional features of the infilling deposits in a faulted lake.The new model may help exploration in the Eogene of the Huizhou depression.
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[1] 王福国,梅廉夫,施和生,等.珠江口盆地珠一坳陷古近系构造样式分析[J].大地构造与成矿学,2008, 32(4):448-454. [WANG Fuguo,MEI Lianfu, SHI Hesheng,et al.Structural styles of Paleogene in Zhu1 Depression of Pearl Rivermouth Basin[J]. Geotectonica et Metallogenia,2008,32(4):448-454.]
[2] 陈长民,施和生,许仕策,等.珠江口盆地(东部)第三系油气藏形成条件[M].北京:科学出版社出版,2003:1-121.[CHEN Changmin,SHI Hesheng, XU Shice,et al. The Conditions of Hydrocarbon Accumulation of the Tertiary Petroleum System in the PearlRiverMouth Basin[M]. Beijing:Science Press,2003:1 -121.]
[3] 崔莎莎,何家雄,陈胜红,等.珠江口盆地发育演化特征及其油气成藏地质条件[J].天然气地质学,2009, 20(3):384-391. [CUI Shasha,HE Jiaxiong,CHEN Shenghong,et al.Development characteristics of Pearl Rivermouth basin and its geological conditions for oil and gas accumulation[J]. Natural Gas Geoscienc,2009, 20(3):384-391.]
[4] 朱俊章,施和生,邓宏文,等.珠江口盆地惠州凹陷古近系烃源岩层序地层学和地球化学研究[J].天然气地球科学,2007,18(5):710-714. [ZHU Junzhang,SHI Hesheng,DENG Hongwen,et al.Geochemistry of source rock in Paleogene sequence of HuiZhou depression,Pearl Rivermouth basin[J].Natural Gas Geoscienc,2007,18(5):710-714.]
[5] 姚光庆,马正,赵彦超,等.浅水三角洲分流河道砂体储层特征[J].石油学报,1995,16(1):24-31. [YAO Guangqin,MA Zheng,ZHAO Yanchao,et al.Reservoir characteristics of distributary channels and bodies of shallow water delta[J].Acta Petrolei Sinica,1995,16(1):24-31.]
[6] 王家豪,姚光庆,赵彦超,等.浅水辫状河三角洲发育区短期基准面旋回划分及储层宏观特征分析[J].沉积学报,2004,22(1):87-94. [WANG Jiahao,YAO Guangqing,ZHAO Yan chao,et al.Study on Identification of Short-Term Base-Level Cycle and Macroscopic Distribution of Reservoirsin Shallow-Water Braided Delta[J].Sedimentologica Sinica, 2004,22(1):87-94.]
[7] 楼章华, 兰翔, 卢庆梅, 等.地形、气候与湖面波动对浅水三角洲沉积环境的控制作用[J].地质学报, 1999, 73(1):83-91. [LOU Zhanghua,LAN Xiang,LU Qingmei,et al.Controls of the Topography, Climate and Lake Level Fluctuation On the Depositional Environment of a Shallow-Water Delta[J].Geologica Sinica,1999,73(1):83-91.]
[8] 赵应成,王天琦,田光荣,等.低渗透油田富集区预测技术研究[J].岩性油气藏, 2007, 19(1):21-26. [ZHAO Yingcheng,WANG Tianqi,TIAN Guangrong,et al.Prediction technique study for hydrocarbon-rich areas in low permeable oil field[J].Lithologic Reservoirs,2007,19(1):21-26.]
[9] 邵龙义,肖正辉,何志平,等.晋东南沁水盆地石炭二叠纪含煤岩系古地理及聚煤作用研究[J].古地理学报, 2006, 8(1):43-52. [SHAO Longyi,XIAO Zhenghui,HE Zhiping,et al.Palaeogeography and coal accumulation for coal measures of the Carboniferous-Permian in Qinshui Basin, southeastern Shanxi Province[J].Journal of Palaeogeography, 2006,8(1):43-52.]
[10] 邵龙义,高迪,罗忠,等.新疆吐哈盆地中、下侏罗统含煤岩系层序地层及古地理[J].古地理学报,2009, 11(2):215-224. [SHAO Longyi,GAO Di,LUO Zhong,et al.Sequence stratigraphy and palaeogeography of the Lower and Middle Jurassic coal measures in Turpan-Hami Basin[J].Journal of Palaeogeography,2009,11(2):215-224.]
[11] 朱筱敏,信荃麟,傅守平,等.东蹼凹陷东南部沙三段三角洲沉积体系与油气关系[J].石油天然气地质,1990,11(1):78-86. [ZHU Xiaomin,XIN Quanlin,FU Shouping,et al. Relations between delta depositional system of Es3,southeast DongPu Depression and hydrocarbon resources[J].Oil & Gas Geology,1990,11(1):78-86.]
[12] 代黎明,李建平,周心怀,等.渤海海域新近系浅水三角洲沉积体系分析[J].岩性油气藏,2007,19(4):75-81. [DAI Liming,LI Jianping,ZHOU Xinhuai,et al.Depositional system of the Neogene shallow water delta in Bohai Sea area[J].Lithologic Reservoirs,2007,19(4):75-81.]
[13] 黄超,陈清华,刘磊,等.济阳坳陷西部馆陶组浅水辫状河三角洲沉积[J]. 油气地质与采收率,2008,15(3):26-30. [HUANG Chao,CHEN Qinghua,LIU Lei,et al.Shallow braided river delta deposited in Guantao Formation of western Jiyang Depression[J].Petroleum Geology and Recovery,2008,15(3):26-30.]
[14] 吕晓光,李长山,蔡希源,等.松辽大型浅水湖盆三角洲沉积特征及前缘相储层结构模型[J].沉积学报, 1999, 17(4):572-576. [LU Xiaoguang,LI Changshan,CAI Xiyuan,et al.Depositional Characteristics and Front Facies ReservoirFramework Model in SongLiao Shallow Lacustrine Delta[J].Sedimentologica Sinica,1999,17(4):572-576.]
[15] 蔡东升, 罗毓辉, 武文来, 等.渤海浅层构造变形特征、成因机理与渤中凹陷及其周围油气富集的关系[J]. 中国海上油气(地质), 2001, 15(1):35-43.[CAI Dongsheng,LUO Yuhui,WU Wenlai,et al.Shallow tectonic deformation and its relationship to hydrocarbon enrichment in BoZhong Depression and adjacent areas,BoHai Basin[J].China Offshore Oil and Gas,2001, 15(1):35-43].
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