摘要
湖泊滨岸砂坝通常会形成优质储集体,是近年油气勘探开发的重点目标之一。然而,对砂坝内部结构特征认识不清,制约了油田的进一步开发和剩余油挖潜。位于山东省中部的峡山湖,其东南岸发育多列沿岸分布的现代砂坝沉积,以此为例,利用浅钻孔、探坑等手段对砂坝内部结构进行细致剖析。研究表明,砂坝总体呈现下细上粗的反粒序结构,其内部由一个或多个增生体叠加而成,增生体之间界面处通常发育泥质沉积(落淤层)。增生体在砂坝内部主要有覆盖式和顶积式2种堆积样式,前者加积作用强,保存较好,增生体规模向上逐渐变大;后者加积作用弱,增生体易受波浪冲刷破坏,规模向上减小。砂坝内落淤层的分布与增生堆积样式有关,覆盖式增生体间的落淤层呈连片披覆状,向湖盆中心倾斜型分布;顶积式增生体间的落淤层呈孤立残留状,近水平零星散布在增生体界面处。现代砂坝内部结构的解剖结果不仅可为认识砂坝储层中砂体的堆积样式和砂、泥岩的空间配置关系提供真实的原型地质模式指导,在建立砂坝储层地质模型时还可提供定量化的条件约束。
The lacustrine near-shore sand bank is one type of good reservoirs,being the key target for oil and gas exploration and development recently.However,lacking clearly understanding of the inner architecture in this type of reservoir significantly restricts the further reservoir development.In southeastern Xiashan Lake,located in the center of Shandong Province,there are a series of modern sand banks observed parallelly to the lake shoreline.By using shallow wells,pits and other methods,a comprehensive research has been conducted to analyze the inner architecture of sand banks.The result shows that a sand bank has a general coarsening upward structure and is made up of one or more accretions.Between two accretions a thin layer of mud deposition can be found.There are two kinds of accretion stack patterns in a single sand bank which are one overlay pattern and one top-set pattern.The former pattern can usually be well persevered and presents a gradually expanding accretion from bottom to top due to strong aggradation.The latter pattern is easily destructed by flush erosion of wave actions and presents a gradually reducing accretion from bottom to top due to weak aggradation.The distribution of mud layer between two accretions is also determined by accretion stack patterns.The mud layer within an overlay pattern displays a continuous draping shape inclining to the lake center,while the mud layers,within a top-set pattern are isolated and discrete which are parallel to the interface of two accretions.A clear understanding of inner architecture in modern sand banks not only provides a real prototype model for better understanding in accretion stack patterns and spatial distribution of sand bodies in sand banks,but also offers quantitative constraints for 3D sand bank geological modeling.
引文
[1]Clifton H E.Supply,segregation,successions,and significance of shallow marine conglomeratic deposits[J].Bulletin of Canadian Petroleum Geology,2003,51(4):370-388.
[2]Zhang J L,Wang B Q.Beach and bar deposits of the palaeogene Dongying Formation in the Hejian oil field[J].Scientia Geologica Sinica,1995,4(4):497-504.
[3]Houser C,Greenwood B.Hydrodynamics and sediment transport within the inner surf zone of a lacustrine multiple-barred nearshore[J].Marine Geology,2005,218(1/2/3/4):37-63.
[4]纪友亮,刘君龙,王天云,等.陆相湖盆三角洲-滩坝复合砂体分布模式及编图方法[J].古地理学报,2016,18(4):615-630.[Ji Youliang,Liu Junlong,Wang Tianyun,et al.Distributing pattern and mapping method of delta and beach-bar composite sandbodies in continental lacustrine basin[J].Journal of Palaeogeography,2016,18(4):615-630.]
[5]Shand R D,Bailey D G,Shepherd M J.Longshore realignment of shore-parallel sand-bars at Wanganui,New Zealand[J].Marine Geology,2001,179(3/4):147-161.
[6]田景春,陈学华,侯明才,等.箕状断陷湖盆缓坡带储集砂体特征、演化及控制因素:以胜利油区东营凹陷南缓坡带沙河街组为例[J].地球学报,2004,25(3):331-336.[Tian Jingchun,Chen Xuehua,Hou Mingcai,et al.Characteristics,evolution and Controlling factors of the terrigenous clastic reservoir sand bodies on the gentle slope zone of the half-graben rift lake basin:A case study of the Shahejie Formation on the southern gentle slope zone of the Dongying depression in the Shengli oil field[J].Acta Geoscientica Sinica,2004,25(3):331-336.]
[7]操应长,王健,刘惠民,等.东营凹陷南坡沙四上亚段滩坝砂体的沉积特征及模式[J].中国石油大学学报(自然科学版),2009,33(6):5-10.[Cao Yingchang,Wang Jian,Liu Huimin,et al.Sedimentary characteristics and models of beach-bar sandbodies in the upper part of the Fourth Member of Paleogene in the south slope of Dongying depression[J].Journal of China University of Petroleum,2009,33(6):5-10.]
[8]姜在兴,王俊辉,张元福.滩坝沉积研究进展综述[J].古地理学报,2015,17(4):427-440.[Jiang Zaixing,Wang Junhui,Zhang Yuanfu.Advances in beach-bar research:a review[J].Journal of Palaeogeography,2015,17(4):427-440.]
[9]潘树新,王建功,刘彩燕,等.坳陷湖盆沿岸坝沉积特征、分布规律及成藏机制:以松辽盆地南部青山口组为例[J].吉林大学学报(地球科学版),2012,42(增刊2):70-78.[Pan Shuxin,Wang Jiangong,Liu Caiyan,et al.Sedimentary features’distribution pattern and accumulation mechanism of lakeshore bar:Taking the Qingshankou Formation in the southern Songliao Basion as an example[J].Journal of Jilin University(Earth Science Edition),2012,42(Suppl.2):70-78.]
[10]荣启宏,蒲玉国,李道轩,等.复杂断裂低渗透薄互层纯化油田开发模式[J].石油勘探与开发,2001,28(5):64-71.[Rong Qihong,Pu Yuguo,Li Daoxuan,et al.The development mode of complicatedly fractured,low-permeability and thinly interbed reservoir in Chunhua oil field[J].Petroleum Exploration and Development,2001,28(5):64-71.]
[11]栾锡武,孙钿奇,彭学超.南海北部陆架南北卫浅滩的成因及油气地质意义[J].地质学报,2012,86(4):626-640.[Luan Xiwu,Sun Dianqi,Peng Xuechao.Genesis of the Nanbeiwei shoal on the shelf of the northern South China Sea and its petroliferous significance[J].Acta Geologica Sinica,2012,86(4):626-640.]
[12]杨勇强,邱隆伟,姜在兴,等.陆相断陷湖盆滩坝沉积模式:以东营凹陷古近系沙四上亚段为例[J].石油学报,2011,32(3):417-423.[Yang Yongqiang,Qiu Longwei,Jiang Zaixing,et al.Adepositional pattern of beach bar in continental rift lake basins:Acase study on the upper part of the Fourth Member of the Shahejie Formation in the Dongying sag[J].Acta Petrolei Sinica,2011,32(3):417-423.]
[13]商晓飞,侯加根,孙福亭,等.砂质滩坝储集层内部结构特征及构型模式:以黄骅坳陷板桥油田古近系沙河街组为例[J].石油学报,2014,35(6):1160-1171.[Shang Xiaofei,Hou Jiagen,Sun Futing,et al.Architectural characteristics and sedimentary models of beach-bar sandstone reservoirs:A case study of the Paleogene Shahejie Formation in Banqiao oilfield,Huanghua depression[J].Acta Petrolei Sinica,2014,35(6):1160-1171.]
[14]Chow N,George A D,Trinajstic K M,et al.Stratal architecture and platform evolution of an early Frasnian syn-tectonic carbonate platform,Canning Basin,Australia[J].Sedimentology,2013,60(7):1583-1620.
[15]朱筱敏,信荃麟,张晋仁.断陷湖盆滩坝储集体沉积特征及沉积模式[J].沉积学报,1994,12(2):20-28.[Zhu Xiaomin,Xin Quanlin,Zhang Jinren.Sedimentary characteristics and models of the beach-bar reservoirs in faulted down lacustrine basin[J].Acta Sedimentologica Sinica,1994,12(2):20-28.]
[16]Charvin K,Hampson G J,Gallagher K L,et al.Characterization of controls on high-resolution stratigraphic architecture in wave-dominated shoreface-shelf parasequences using inverse numerical modeling[J].Journal of Sedimentary Research,2011,81(8):562-578.
[17]Brooks G R,Doyle L J,Suthard B C,et al.Facies architecture of the mixed carbonate/siliciclastic inner continental shelf of westcentral Florida:implications for Holocene barrier development[J].Marine Geology,2003,200(1/2/3/4):325-349.
[18]高艺,姜在兴,李俊杰,等.古地貌恢复及其对滩坝沉积的控制作用:以辽河西部凹陷曙北地区沙四段为例[J].油气地质与采收率,2015,22(5):40-46.[Gao Yi,Jiang Zaixing,Li Junjie,et al.Restoration of paleogeomorphology and its controlling effect on deposition of beach-bar sand bodies:A case study of the Fourth Member of Shahejie Formation,Shubei area,Liaohe Western sag[J].Petroleum Geology and Recovery Efficiency,2015,22(5):40-46.]
[19]Hoy R G,Ridgway K D.Sedimentology and sequence stratigraphy of fan-delta and river-delta deposystems,Pennsylvanian Minturn Formation,Colorado[J].AAPG Bulletin,2003,87(7):1169-1191.
[20]邓宏文,马立祥,姜正龙,等.车镇凹陷大王北地区沙二段滩坝成因类型、分布规律与控制因素研究[J].沉积学报,2008,26(5):715-724.[Deng Hongwen,Ma Lixiang,Jiang Zhenglong,et al.Sand bank generation types and its controls on their distribution,the second member of Shahejie Formation,Lower Tertiary,Dawangbei,Chezhen depression[J].Acta Sedimentologica Sinica,2008,26(5):715-724.]
[21]胡晨林,张元福,姜在兴,等.风浪作用下鄱阳湖现代滨岸滩坝的形态变化[J].石油学报,2015,36(12):1543-1552.[Hu Chenlin,Zhang Yuanfu,Jiang Zaixing,et al.Morphologic changes in modern onshore beach bar of Poyang Lake under wind and wave actions[J].Acta Petrolei Sinica,2015,36(12):1543-1552.]
[22]Valero-Garcés B,Morellón M,Moreno A,et al.Lacustrine carbonates of Iberian Karst Lakes:sources,processes and depositional environments[J].Sedimentary Geology,2014,299:1-29.
[23]商晓飞,侯加根,刘钰铭,等.黄骅坳陷板桥地区湖相滩坝砂体内部隔(夹)层成因机制与分布样式[J].古地理学报,2014,16(5):581-596.[Shang Xiaofei,Hou Jiagen,Liu Yuming,et al.Genetic mechanism and distribution patterns of inter(inner)-layers in lacustrine beach-bar sand bodies in Banqiao area,Huanghua depression[J].Journal of Palaeogeography,2014,16(5):581-596.]
[24]邓世彪,关平,张鹏飞.东营凹陷青南地区沙四上亚段物源沉积体系与滩坝分布[J].沉积学报,2017,35(3):561-576.[Deng Shibiao,Guan Ping,Zhang Pengfei.Provenance,sedimentary system and beach bar distribution of the upper Es4in Qingnan area,Dongying depression[J].Acta Sedimentologica Sinica,2017,35(3):561-576.]
[25]Miall A D.Architectural elements and bounding surfaces in fluvial deposits:anatomy of the Kayenta Formation(lower Jurassic),Southwest Colorado[J].Sedimentary Geology,1988,55(3/4):233-240,247-262.
[26]吴胜和,纪友亮,岳大力,等.碎屑沉积地质体构型分级方案探讨[J].高校地质学报,2013,19(1):12-22.[Wu Shenghe,Ji Youliang,Yue Dali,et al.Discussion on hierarchical scheme of architectural units in clastic deposits[J].Geological Journal of China Universities,2013,19(1):12-22.]
[27]冯文杰,吴胜和,印森林,等.准噶尔盆地西北缘三叠系干旱型冲积扇储层内部构型特征[J].地质论评,2017,63(1):219-234.[Feng Wenjie,Wu Shenghe,Yin Senlin,et al.Internal architecture characteristics of Triassic arid alluvial fan in northwestern margin of Junggar Basin[J].Geological Review,2017,63(1):219-234.]
[28]徐中波,申春生,陈玉琨,等.砂质辫状河储层构型表征及其对剩余油的控制:以渤海海域P油田为例[J].沉积学报,2016,34(2):375-385.[Xu Zhongbo,Shen Chunsheng,Chen Yukun,et al.Architecture characterization for sandy braided river reservoir and controlling factors of remaining oil distribution:A case study of P oilfield(Neogene),Bohai offshore,China[J].Acta Sedimentologica Sinica,2016,34(2):375-385.]
[29]Levoy F,Anthony E J,Monfort O,et al.Formation and migration of transverse bars along a tidal sandy coast deduced from multi-temporal Lidar datasets[J].Marine Geology,2013,342:39-52.
[30]Ponce J J,Carmona N.Coarse-grained sediment waves in hyperpycnal clinoform systems,Miocene of the Austral foreland basin,Argentina[J].Geology,2011,39(8):763-766.
[31]商晓飞,侯加根,程远忠,等.厚层湖泊滩坝砂体成因机制探讨及地质意义:以黄骅坳陷板桥凹陷沙河街组二段为例[J].地质学报,2014,88(9):1705-1718.[Shang Xiaofei,Hou Jiagen,Cheng Yuanzhong,et al.Formation mechanism of the thick layer lacustrine beach-bar and its geological implications:An example of the 2nd Member of the Shahejie Formation in Banqiao sag[J].Acta Geologica Sinica,2014,88(9):1705-1718.]
[32]邱隆伟,周军良,姜在兴,等.峡山湖沙坝的现代沉积[J].海洋地质与第四纪地质,2009,29(4):135-141.[Qiu Longwei,Zhou Junliang,Jiang Zaixing,et al.A recent sedimentary study on sand bar in Xiashan Lake[J].Marine Geology&Quaternary Geology,2009,29(4):135-141.]
[33]胡光义,范廷恩,陈飞,等.从储层构型到“地震构型相”:一种河流相高精度概念模型的表征方法[J].地质学报,2017,91(2):465-478.[Hu Guangyi,Fan Tingen,Chen Fei,et al.From reservoir architecture to seismic architecture facies:Characteristic method of a high-resolution fluvial facies model[J].Acta Geologica Sinica,2017,91(2):465-478.]
[34]邱隆伟,周军良,王新征,等.山东峡山湖滩砂的现代沉积特征研究[J].矿物岩石地球化学通报,2010,29(2):142-148.[Qiu Longwei,Zhou Junliang,Wang Xinzheng,et al.A characteristics study of neoteric sediment to the beach of Xiashan Lake in Shandong province[J].Bulletin of Mineralogy,Petrology and Geochemistry,2010,29(2):142-148.]
[35]韩元红,郝乐伟,王琪,等.青海湖近岸现代沉积滩坝主要类型及沉积特征[J].古地理学报,2016,18(5):759-768.[Han Yuanhong,Hao Lewei,Wang Qi,et al.Sedimentary characteristics and types of beach bars deposited in modern times in nearshore of Qinghai Lake[J].Journal of Palaeogeography,2016,18(5):759-768.]
[36]王永诗,刘惠民,高永进,等.断陷湖盆滩坝砂体成因与成藏:以东营凹陷沙四上亚段为例[J].地学前缘,2012,19(1):100-107.[Wang Yongshi,Liu Huimin,Gao Yongjin,et al.Sandbody genesis and hydrocarbon accumulation mechanism of beach-bar reservoir in faulted-lacustrine-basins:A case study from the upper of the Fourth Member of Shahejie Formation,Dongying sag[J].Earth Science Frontiers,2012,19(1):100-107.]
[37]孙天建,穆龙新,赵国良.砂质辫状河储集层隔夹层类型及其表征方法:以苏丹穆格莱特盆地Hegli油田为例[J].石油勘探与开发,2014,41(1):112-120.[Sun Tianjian,Mu Longxin,Zhao Guoliang.Classification and characterization of barrier-intercalation in sandy braided river reservoirs:Taking Hegli oilfield of Muglad Basin in Sudan as an example[J].Pereoleum Exploration and Development,2014,41(1):112-120.]
[38]李安夏,王冠民,庞小军,等.间歇性波浪条件下湖相滩坝砂的结构特征:以东营凹陷南斜坡王73井区沙四段为例[J].油气地质与采收率,2010,17(3):12-14.[Li Anxia,Wang Guanmin,Pang Xiaojun,et al.Structural features of lacustrine shoal-bar sandstone under intermittent wave-a case of Sha 4 Member of Shahejie Formation of well Wang 73,southern slope zone,Dongying depression[J].Petroleum Geology and Recovery Efficiency,2010,17(3):12-14.]
[39]邹才能,赵文智,张兴阳,等.大型敞流坳陷湖盆浅水三角洲与湖盆中心砂体的形成与分布[J].地质学报,2008,82(6):813-825.[Zou Caineng,Zhao Wenzhi,Zhang Xingyang,et al.Formation and distribution of shallow-water deltas and central-basin sandbodies in large open depression lake basins[J].Acta Geologica Sinica,2008,82(6):813-825.]