车排子地区新近系沙湾组物源与沉积相分析
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摘要
在前人研究基础之上,利用地震、测井、录井、岩心、薄片、地球化学等资料,以砂岩厚度、砂岩碎屑成分、沉积期古地貌、砂岩重矿物含量等多方面的证据确定研究区沙湾组的物源方向,并利用岩石学、粒度分析、测井相、地震相等资料或方法研究沙湾组沉积相类型和展布特征,最后结合构造背景、古地貌、层序地层体系域的构成样式尝试对其沉积相模式进行研究。结果表明:车排子地区沙湾组发育西南方向伊林黑比尔根山和西北方向扎伊尔山两个物源体系,且西南方向的物源延伸距离远,波及范围大;沙湾组发育辫状河三角洲、扇三角洲、湖泊3种沉积相类型,南部地区发育大范围展布的退积型辫状河三角洲,北部主要发育扇三角洲,其前端和侧翼发育滨浅湖滩坝砂沉积;辫状河三角洲前缘水下分支河道砂体容易形成上倾尖灭型岩性圈闭,滨浅湖滩坝砂容易形成透镜体岩性圈闭。
Based on the previous studies and by using the data of seismic,logging,cores,slice and geochemical,the source direction of Shawan group of study area was confirmed through various evidence of sandstone thickness,sandstone clastic composition,paleo-geomorphology and sandstone heavy mineral content.The sedimentary facies and Shawan group exhibition characteristics were studied by means of the data and method of petrology,grain size analysis,log facies and seismic facies.The sedimentary facies model was studied by combining with the construction background,paleo-geomorphology and the structure style of sequence stratigraphic system.The results show that the provenance of Shawan area includes two source system directions,which are Elaine black bill root mountain in southwest direction and Zaire mountain in northwest.Moreover,the extension distance of southwest direction of provenance is long and the influence range is wide.The sedimentary facies of Neogene Shawan group include braided delta,fan delta and lakes phase.Large scope of the southern area exhibits the back multiplicative braided delta and the northern area develops fan delta.And the coastal-shallow lake sand sedimentary appears in the front and the sides.The subaqueous distributary channel sand of braided stream delta front is easy to form the type of pointed lithologic trap and the coastal-shallow lake sand develops the lens lithologic trap easily.
Based on the previous studies and by using the data of seismic,logging,cores,slice and geochemical,the source direction of Shawan group of study area was confirmed through various evidence of sandstone thickness,sandstone clastic composition,paleo-geomorphology and sandstone heavy mineral content.The sedimentary facies and Shawan group exhibition characteristics were studied by means of the data and method of petrology,grain size analysis,log facies and seismic facies.The sedimentary facies model was studied by combining with the construction background,paleo-geomorphology and the structure style of sequence stratigraphic system.The results show that the provenance of Shawan area includes two source system directions,which are Elaine black bill root mountain in southwest direction and Zaire mountain in northwest.Moreover,the extension distance of southwest direction of provenance is long and the influence range is wide.The sedimentary facies of Neogene Shawan group include braided delta,fan delta and lakes phase.Large scope of the southern area exhibits the back multiplicative braided delta and the northern area develops fan delta.And the coastal-shallow lake sand sedimentary appears in the front and the sides.The subaqueous distributary channel sand of braided stream delta front is easy to form the type of pointed lithologic trap and the coastal-shallow lake sand develops the lens lithologic trap easily.
引文
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[12]杨少春,孟祥梅,陈宁宁,等.准噶尔盆地车排子地区新近系沙湾组沉积特征[J].中国石油大学学报:自然科学版,2011,35(2):20-25.YANG Shao-chun,MENG Xiang-mei,CHEN Ning-ning,et al.Depositional characteristics of Shawan for-mation in Neogene of Chepaizi area,Junggar Basin[J].Journal of China University of Petroleum(Edition of Nat-ural Science),2011,35(2):20-25.
[2]苏朝光,仲维苹.准噶尔盆地车排子凸起新近系沙湾组物源分析[J].石油天然气地质,2010,31(5):648-655.SU Chao-guang,ZHONG Wei-ping.An analysis on theprovenance of the Neogene Shawan formation in the Chep-aizi uplift of the Junggar Basin[J].Oil&Gas Geology,2010,31(5):648-655.
[3]张琴,张满郎,朱筱敏,等.准噶尔盆地阜东斜坡区侏罗纪物源分析[J].新疆石油地质,1999,20(6):501-504.ZHANG Qin,ZHANG Man-lang,ZHU Xiao-min,et al.Analysis of Jurassic sources in East Fukang slope of Jung-gar Basin[J].Xinjiang Petroleum Geology,1999,20(6):501-504.
[4]陈纯芳,郑浚茂,王德发.板桥凹陷沙三段沉积体系与物源分析[J].古地理学报,2001,3(1):53-62.CHEN Chun-fang,ZHENG Jun-mao,WANG De-fa.Depositional systems and source provenance of the thirdmember of Shahejie formation in Banqiao sag[J].Journalof Palaeogeography,2001,3(1):53-62
[5]李珍,焦养泉,刘春华,等.黄骅坳陷高柳地区重矿物物源分析[J].石油勘探与开发,1998,25(6):5-7.LI Zhen,JIAO Yang-quan,LIU Chun-hua,et al.Sourceanalysis of heavy minerals in Gaoliu area,Huanghua de-pression[J].Petroleum Exploration and Development,1998,25(6):5-7.
[6]李军,王贵文.高分辨率倾角测井在砂岩储层中的应用[J].测井技术,1995,19(5):352-357.LI Jun,WANG Gui-wen.Applications of high resolutiondip log to the study of sand reservoir[J].Well LoggingTechnology,1995,19(5):352-357.
[7]孔德林,王智.应用倾角测井资料研究石西油田沉积相[J].新疆石油地质,1996,16(3):217-221.KONG De-lin,WANG Zhi.Study on sedimentary faciesof Shixi Oilfield by applying diplogging NGD data[J].Xinjiang Petroleum Geology,1996,16(3):217-221.
[8]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 Dai-du,QIU Gui-qiang,LI Cong-xian,et al.Pa-leocurrent properties of Dongying delta in Bohai Bay Basin[J].Acta Petrolei Sinica,2000,21(1):29-33.
[9]李曰俊,买光荣,罗俊成,等.塔里木盆地巴楚断隆古生代沉积构造背景和物源区性质的探讨[J].古地理学报,1999,1(4):45-23.LI Yue-jun,MAI Guang-rong,LUO Jun-cheng,et al.Palaeozoic tectonic setting and provenance nature discrim-ination of Bachu fault-uplift,Tarim,Northwest China[J].Journal of Palaeogeography,1999,1(4):45-53.
[10]杨守业,李从先,张家强.苏北滨海平原冰后期古地理演化与沉积物物源研究[J].古地理学报,2000,2(2):66-72.YANG Shou-ye,LI Cong-xian,ZHANG Jia-qiang,etal.Palaeogeographic evolution of Coastal Plain andprovenance study of postglacial sediments in North Jiang-su Province[J].Journal of Palaeogeography,2000,2(2):66-72.
[11]胡宗全,朱筱敏,彭勇民.准噶尔盆地西北缘车排子地区侏罗系物源及古水流分析[J].古地理学报,2001,3(3):49-54.HU Zong-quan,ZHU Xiao-min,PENG Yong-min.A-nalysis of provenance and palaeocurrent direction of Ju-rassic at Chepaizi region in northwest edge of JunggarBasin[J].Journal of Palaeogeography,2001,3(3):49-54.
[12]杨少春,孟祥梅,陈宁宁,等.准噶尔盆地车排子地区新近系沙湾组沉积特征[J].中国石油大学学报:自然科学版,2011,35(2):20-25.YANG Shao-chun,MENG Xiang-mei,CHEN Ning-ning,et al.Depositional characteristics of Shawan for-mation in Neogene of Chepaizi area,Junggar Basin[J].Journal of China University of Petroleum(Edition of Nat-ural Science),2011,35(2):20-25.
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