摘要
以松辽盆地齐家—古龙地区白垩系嫩江组一段为研究对象,通过地震沉积学、沉积构造和沉积序列等分析,发现异重流成因的大型水道—湖底扇系统,对大型坳陷湖盆深水区分布的异重流及其形成的异重岩进行研究,构建了陆相湖盆异重流成因的水道—湖底扇沉积模式。研究表明,异重流发源于盆地边缘,经北部三角洲后在深水区形成完整的水道—湖底扇系统。自北向南依次发育顺直水道和弯曲水道,直线延伸距离超过80 km,宽度100~900 m;水道末端发育湖底扇,最大面积可达20 km~2。该系统主要以细粒沉积为主,发育块状砂岩和流水成因的沉积构造,内部发育侵蚀接触面,富含陆源有机质碎屑,具底床载荷和悬浮载荷兼有的形成机制。异重岩沉积序列表现为向上变粗和向上变细的旋回成对出现,反映洪水逐渐增强随后又减弱的动力学特点。
Based on the integrated analysis of the seismic sedimentology, drilling and core data from the Nen 1 Member of the Cretaceous Nenjiang Formation in the Qijia-Gulong area, a large channel fan system of hyperpycnal flow origin was found in the Songliao Basin, and the hyperpycnal flows and hyperpycnites distributed in the deep water area of large depression lake basin were examined to find out the depositional model of channel-fan of hyperpycnal flow origin in the continental lake basin. The study shows that the hyperpycnal flow in this area originated from the edge of the basin, passed the northern delta, and then gave rise to a complete channel-fan system in the deep water area. The channel-fan system consists of straight channel and meandering channel from north to south with a straight extension of over 80 km and width of 100-900 m, and distal fan lobes at the channel tip with the maximum area of 20 km~2. Dominated by fine-grained deposits, the system contains massive sandstone and sedimentary structures of flow water origin, internal erosion surfaces, and rich continental organic clasts, and shows bed-load and suspended-load transportation mechanisms. The hyperpycnite sequence has a coarsening-upward lower sequence and fining-upward upper sequence appearing in pairs, reflecting the dynamic feature of flood strengthening and then weakening cycle.
引文
[1]MOSCARDELLI L,WOOD L.New classification system for mass transport complexes in offshore Trinidad[J].Basin Research,2010,20(1):73-98.
[2]SHIPP R C,WEIMER P,POSAMENTIER H W.Mass-transport deposits in deepwater settings[M].Tulsa:SEPM,2011:1-4.
[3]SHANMUGAM G.Deep-marine tidal bottom currents and their reworked sands in modern and ancient submarine canyons[J].Marine and Petroleum Geology,2003,20(5):471-491.
[4]SHANMUGAM G.Ten turbidite myths[J].Earth Science Reviews,2002,58(3):311-341.
[5]MULDER T,CHAPRON E.Flood deposits in continental and marine environments:Character and significance[M]//SLATT R M,ZAVALA C.Sediment transfer from shelf to deep water:Revisiting the delivery system.Tulsa:AAPG,2011:1-30.
[6]ZAVALA C,ARCURI M,GAMERO H,et al.A genetic facies tract for the analysis of sustained hyperpycnal flow deposits[M]//SLATT R M,ZAVALA C.Sediment transfer from shelf to deep water:Revisiting the delivery system.Tulsa:AAPG,2011:31-51.
[7]MULDER T,SYVITSKI J P,MIGEON S,et al.Marine hyperpycnal flows:Initiation,behavior and related deposits.A review[J].Marine and Petroleum Geology,2003,20(6):861-882.
[8]BATES C C.Rational theory of delta formation[J].AAPG Bulletin,1953,37(9):2119-2162.
[9]MULDER T,SYVITSKI J P.Turbidity currents generated at river mouths during exceptional discharges to the world oceans[J].The Journal of Geology,1995,103(3):285-299.
[10]SLATT R M,ZAVALA C.Sediment transfer from shelf to deep water:Revisiting the delivery system[M].Tulsa:AAPG,2011.
[11]KATZ T,GINAT H,EYAL G,et al.Desert flash floods form hyperpycnal flows in the coral-rich Gulf of Aqaba,Red Sea[J].Earth and Planetary Science Letters,2015,417:87-98.
[12]AOKI S I,KATO S,OKABE T.Observation of flood-driven sediment transport and deposition off a river mouth[J].Procedia Engineering,2015,116(1):1050-1056.
[13]BUATOIS L A,SACCAVINO L L,ZAVALA C.Ichnology signatures of hyperpycnal flow deposits in Cretaceous river-dominated deltas,Austral Basin,Southern Argentina[M]//SLATT R M,ZAVALA C.Sediment transfer from shelf to deep water:Revisiting the delivery system.Tulsa:AAPG,2011:153-170.
[14]CARMONA N B,PONCE J J.Ichnology and sedimentology of miocene hyperpycnites of the Austral Foreland Basin(Tierra del Fuego,Argentina):Trace fossil distribution and paleoecological implications[M]//SLATT R M,ZAVALA C.Sediment transfer from shelf to deep water:Revisiting the delivery system.Tulsa:AAPG,2011:171-192.
[15]GARCíA-GARCíA F,CORBíH,SORIA J M,et al.Architecture analysis of a river flood-dominated delta during an overall sea-level rise(early Pliocene,SE Spain)[J].Sedimentary Geology,2011,237(1):102-113.
[16]GIRARD F,GHIENNE J F,RUBINO J L.Occurrence of hyperpycnal flows and hybrid event beds related to glacial outburst events in a late Ordovician Proglacial Delta(Murzuq Basin,SW Libya)[J].Journal of Sedimentary Research,2012,82(9):688-708.
[17]LAMB M P,MOHRIG D.Do hyperpycnal-flow deposits record river-flood dynamics?[J].Geology,2009,37(12):1067-1070.
[18]OLARIU C,STEEL R J,PETTER A L.Delta-front hyperpycnal bed geometry and implications for reservoir modeling:Cretaceous Panther Tongue delta,Book Cliffs,Utah[J].AAPG Bulletin,2010,94(6):819-845.
[19]TALLING P J,PAULL C K,PIPER D J W.How are subaqueous sediment density flows triggered,what is their internal structure and how does it evolve?Direct observations from monitoring of active flows[J].Earth Science Reviews,2013,125(3):244-287.
[20]袁选俊,林森虎,刘群,等.湖盆细粒沉积特征与富有机质页岩分布模式:以鄂尔多斯盆地延长组长7油层组为例[J].石油勘探与开发,2015,42(1):34-43.YUAN Xuanjun,LIN Senhu,LIU Qun,et al.Lacustrine fine-grained sedimentary features and organic-rich shale distribution pattern:A case study of Chang 7 Member of Triassic Yanchang Formation in Ordos Basin,NW China[J].Petroleum Exploration and Development,2015,42(1):34-43.
[21]赵文智,王兆云,王东良,等.分散液态烃的成藏地位与意义[J].石油勘探与开发,2015,42(4):401-413.ZHAO Wenzhi,WANG Zhaoyun,WANG Dongliang,et al.Contribution and significance of dispersed liquid hydrocarbons to reservoir formation[J].Petroleum Exploration and Development,2015,42(4):401-413.
[22]邹才能,翟光明,张光亚,等.全球常规-非常规油气形成分布、资源潜力及趋势预测[J].石油勘探与开发,2015,42(1):13-25.ZOU Caineng,ZHAI Guangming,ZHANG Guangya,et al.Formation,distribution,potential and prediction of global conventional and unconventional hydrocarbon resources[J].Petroleum Exploration and Development,2015,42(1):13-25.
[23]潘树新,刘化清,肖文华,等.陆相湖盆水下滑坡体及其石油地质意义[C]//2015年全国沉积学大会沉积学与非常规资源论文摘要集.北京:中国地质学会,2015:30.PAN Shuxin,LIU Huaqing,XIAO Wenhua,et al.Sublaucustrine landslides and implications for hydrocarbon exploration[C]//Abstracts of sedimentological and unconventional resources papers of China sedimentological congress in 2015.Beijing:Geological Society of China,2015:30.
[24]潘树新,郑荣才,卫平生,等.陆相湖盆块体搬运体的沉积特征、识别标志与形成机制[J].岩性油气藏,2013,25(2):53-61.PAN Shuxin,ZHENG Rongcai,WEI Pingsheng,et al.Deposition characteristics,recognition mark and form mechanism of mass transport deposits in terrestrial lake Basin[J].Lithologic Reservoirs,2013,25(2):53-61.
[25]PAN S X,WEI P S,WANG T Q,et al.Mass-transport deposits of the Upper Cretaceous Qingshankou Formation,Songliao Terrestrial Basin,Northeast China:Depositional characteristics,recognition criteria and external geometry[J].Acta Geologica Sinica(English Edition),2014,88(1):62-77.
[26]李祥辉,王成善,金玮,等.深海沉积理论发展及其在油气勘探中的意义[J].沉积学报,2009,27(1):77-86.LI Xianghui,WANG Chengshan,JIN Wei,et al.A review on deep-sea sedimentation theory:Significances to oil-gas exploration[J].Acta Sedimentologica Sinica,2009,27(1):77-86.
[27]邹才能,赵政璋,杨华,等.陆相湖盆深水砂质碎屑流成因机制与分布特征:以鄂尔多斯盆地为例[J].沉积学报,2009,27(6):1065-1075.ZOU Caineng,ZHAO Zhengzhang,YANG Hua,et al.Genetic mechanism and distribution of sandy debris flows in Terrestrial Lacustrine Basin[J].Acta Sedimentologica Sinica,2009,27(6):1065-1075.
[28]李相博,陈启林,刘化清,等.鄂尔多斯盆地延长组3种沉积物重力流及其含油气性[J].岩性油气藏,2010,22(3):16-21.LI Xiangbo,CHEN Qilin,LIU Huaqing,et al.Three types of sediment gravity flows and their petroliferous features of Yanchang Formation in Ordos Basin[J].Lithologic Reservoirs,2010,22(3):16-21.
[29]杨仁超,金之钧,孙冬胜,等.鄂尔多斯晚三叠世湖盆异重流沉积新发现[J].沉积学报,2015,33(1):10-20.YANG Renchao,JIN Zhijun,SUN Dongsheng,et al.Discovery of hyperpycnal flow deposits in the Late Triassic lacustrine Ordos Basin[J].Acta Sedimentologica Sinica,2015,33(1):10-20.
[30]杨田,操应长,王艳忠,等.异重流沉积动力学过程及沉积特征[J].地质论评,2015,61(1):23-33.YANG Tian,CAO Yingchang,WANG Yanzhong,et al.Sediment dynamics process and sedimentary characteristics of hyperpycnal flows[J].Geological Review,2015,61(1):23-33.
[31]潘树新,陈彬滔,刘化清,等.陆相湖盆深水底流改造砂:沉积特征、成因及其非常规油气勘探意义[J].天然气地球科学,2014,25(10):1577-1585.PAN Shuxin,CHEN Bintao,LIU Huaqing,et al.Deepwater bottom current rework sand in lacustrine basins:Sedimentary characteristics,identification criterion,formation mechanism and its significance for unconventional oil/gas exploration[J].Natural Gas Geoscience,2014,25(10):1577-1585.
[32]YANG W L,LI Y K,GAO R Q.Formation and evolution of nonmarine petroleum in Songliao Basin,China[J].AAPG Bulletin,1985,69(7):1112-1122.
[33]方大钧,张兆华,王兆樑,等.松辽地块白垩纪古地磁与古构造[J].科学通报,1988,33(3):211.FANG Dajun,ZHANG Zhaohua,WANG Zhaoliang,et al.Paleo-magmatic and paleo-structures in the Cretaceous Songliao Block[J].Chinese Science Bulletin,1988,33(3):211.
[34]冯志强,张顺,解习农,等.松辽盆地嫩江组大型陆相坳陷湖盆湖底水道的发现及其石油地质意义[J].地质学报,2006,80(8):1226-1232.FENG Zhiqiang,ZHANG Shun,XIE Xinong,et al.Discovery of a large-scale lacustrine subaqueous channel in the Nenjiang Formation of the Songliao Basin and its implication on petroleum geology[J].Acta Geologica Sinica,2006,80(8):1226-1232.
[35]潘树新,郭维华,马凤良,等.松辽盆地榆树水系泉头组—嫩江组沉积相特征及勘探潜力[J].新疆石油地质,2010,31(1):47-50.PAN Shuxin,GUO Weihua,MA Fengliang,et al.Characteristics of sedimentary facies and exploration potential of Quantou-Nenjiang Formation in Yushu System of Songliao Basin[J].Xinjiang Petroleum Geology,2010,31(1):47-50.
[36]潘树新,卫平生,王天琦,等.松辽盆地东部物源的发现及其石油地质意义[J].天然气地球科学,2011,22(6):1021-1027.PAN Shuxin,WEI Pingsheng,WANG Tianqi,et al.Discovery of easter provenance in Songliao Basin and its implications on petroleum geology[J].Natural Gas Geoscience,2011,22(6):1021-1027.
[37]LEOPOLD L B,WOLMAN M G.River channel pattern:Braided,meandering,and straight[J].Professional Geographer,1963,9:39-85.
[38]CAMACHO H,BUSBY C J,KNELLER B.A new depositional model for the classical turbidite locality at San Clemente State Beach,California[J].AAPG Bulletin,2002,86(9):1543-1560.
[39]吕洪波,章雨旭,夏邦栋,等.南盘江盆地中三叠统复理石中的同沉积挤压构造:一类新的沉积构造的归类、命名和构造意义探讨[J].地质论评,2003,49(5):449-456.LYU Hongbo,ZHANG Yuxu,XIA Bangdong,et al.Syn-sedimentary compression structures in the middle Triassic Flysch of the Nanpanjiang Basin,SW China[J].Geological Review,2003,49(5):449-456.
[40]李勇,钟建华,邵珠福,等.软沉积变形构造的分类和形成机制研究[J].地质论评,2012,58(5):829-838.LI Yong,ZHONG Jianhua,SHAO Zhufu,et al.An overview on the classification and genesis of soft-sediment deformation structure[J].Geological Review,2012,58(5):829-838.
[41]KOLLA V,POSAMENTIER H W,WOOD L J.Deep-water and fluvial sinuous channels:Characteristics,similarities and dissimilarities,and modes of formation[J].Marine and Petroleum Geology,2007,24(6):388-405.
[42]WYNN R B,CRONIN B T,PEAKALL J.Sinuous deep-water channels:Genesis,geometry and architecture[J].Marine and Petroleum Geology,2007,24(6):341-387.
[43]BABONNEAU N,SAVOYE B,CREMER M,et al.Sedimentary architecture in meanders of a submarine channel:Detailed study of the present Congo turbidite channel[J].Journal of Sedimentary Research,2010,80(10):852-866.
[44]DAMUTH J E,OLSON H C.Latest Quaternary sedimentation in the northern Gulf of Mexico Intraslope Basin Province:Sediment facies and depositional processes[J].Geosphere,2015,11(6):1689-1718.
[45]GAMBERI F,ROVERE M,MARANI M P,et al.Modern submarine canyon feeder-system and deep-sea fan growth in a tectonically active margin(northern Sicily)[J].Geosphere,2015,11(2):307-319.
[46]JANOCKO M,NEMEC W,HENRIKSEN S,et al.The diversity of deep-water sinuous channel belts and slope valley-fill complexes[J].Marine and Petroleum Geology,2013,41(1):7-34.
[47]LABOURDETTE R,PONCET J,SEGUIN J,et al.Three-dimensional modelling of stacked turbidite channels in West Africa:Impact on dynamic reservoir simulations[J].Petroleum Geoscience,2006,12(4):335-345.
[48]TALLING P J,WYNN R B,SCHMMIDT D N,et al.How did thin submarine debris flows carry boulder-sized intraclasts for remarkable distances across low gradients to the far reaches of the Mississippi fan?[J].Journal of Sedimentary Research,2010,80(10):829-851.
[49]ZHIQIANG F,SHUN Z,CROSS T A,et al.Lacustrine turbidite channels and fans in the Mesozoic Songliao Basin,China[J].Basin Research,2010,22(1):96-107.
[50]ZAVALA C,ARCURI M.Intrabasinal and extrabasinal turbidites:Origin and distinctive characteristics[J].Sedimentary Geology,2016,337:36-54.