济阳坳陷车镇凹陷车66块沙三下段精细沉积相分析
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摘要
根据测井、地震、岩心资料,运用地质综合方法确定济阳坳陷车镇凹陷北部陡坡带砂体成因类型,搞清深水沉积边界。通过岩心观察与描述、地质地震剖面对比以及沉积相平面分布的研究,认为:车66井区沙三下段发育湖底扇、滑塌浊积扇,它们夹持于暗色深水泥岩之中,以内扇沉积为特色,在主水道及水道间堆积了中、细砾岩碎屑流与背景相泥岩。纵向上,沙三下段具有下部富砂、上部富泥的特征;平面上,自北而南由湖底扇内扇碎屑流→中扇颗粒流、浊流变化,沉积相变化具有从近源到远源发展的趋势,表明了物源来自于北部的埕子口凸起。
On the basis of well-loggings,seismics,cores data,the sandstone-body types of the block Che 66 on the northern steep slope zone of Chezhen Sag in Jiyang Depression,were determined by geologically-synthesized methods,and the depositional boundaries of deep-water were also made clear.With detailed observations and descriptions of cores,combined with geological and seismic profiles,and plane distributions of sedimentary facies studied,it was concluded that the sub-lacustrine fans and slide turbidite fans of the Lower Third Member of Shahejie Formation were developed in the block Che 66,interlayered within deep-water dark mudstones where characteristic sediments were the inner fan of the sub-lacustrine fans,within main-channels and inter-channels,medium-and fine-grained conglomerates of debris flows and mudstones of setting sediments.Longitudinally the upper of the member is mudstone-dominated and lower sandstone-dominated.The inner fan debris flows of lake fans were turned into the middle fan grain flows and turbidity flows of lake fans were from north to south,with sedimentary facies trend from near proximate to distal provenances.This proclaimed that the provenances were from the northern Chenzikou bulge.
On the basis of well-loggings,seismics,cores data,the sandstone-body types of the block Che 66 on the northern steep slope zone of Chezhen Sag in Jiyang Depression,were determined by geologically-synthesized methods,and the depositional boundaries of deep-water were also made clear.With detailed observations and descriptions of cores,combined with geological and seismic profiles,and plane distributions of sedimentary facies studied,it was concluded that the sub-lacustrine fans and slide turbidite fans of the Lower Third Member of Shahejie Formation were developed in the block Che 66,interlayered within deep-water dark mudstones where characteristic sediments were the inner fan of the sub-lacustrine fans,within main-channels and inter-channels,medium-and fine-grained conglomerates of debris flows and mudstones of setting sediments.Longitudinally the upper of the member is mudstone-dominated and lower sandstone-dominated.The inner fan debris flows of lake fans were turned into the middle fan grain flows and turbidity flows of lake fans were from north to south,with sedimentary facies trend from near proximate to distal provenances.This proclaimed that the provenances were from the northern Chenzikou bulge.
引文
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[2]王永诗,鲜本忠.车镇凹陷北部陡坡带断裂结构及其对沉积和成藏的控制[J].油气地质与采收率,2006,13(6):5-8.
[3]张善文,隋风贵,王永诗.济阳坳陷下第三系陡岸沉积模式[J].沉积学报,2001,19(2):219-223.
[4]肖焕钦,王宝言,陈宝宁,等.济阳坳陷陡坡带断裂控砂模式[J].油气地质与采收率,2002,9(5):20-22.
[5]王蛟,姜在兴,陈世悦.渤海湾盆地车镇凹陷古近系层序地层与隐蔽油气藏[J].吉林大学学报(地球科学版),2005,35(2):163-169.
[6]刘传虎.砂砾岩扇体发育特征及地震描述技术[J].石油物探,2001,40(1):64-72.
[7]宋国奇.济阳坳陷下第三系湖相沉积的层序地层学分析[J].现代地质,1999,13(1):20-30.
[8]Li Pilong,Zhang Shanwen,Xiao Huanqin,et al.Exploration of subtle trap in Jiyang Depression[J].Petroleum Science,2004,1(2):13-21.
[9]施振生,朱筱敏,胡斌,等.济阳坳陷车镇凹陷古近系沙河街组遗迹化石Maca ronichnus(通心粉管迹)及其沉积环境[J].古地理学报,2004,16(12):207-215.
[10]饶孟余,钟建华,王海侨,等.山东东营牛庄洼陷沙三中亚段浊积砂体储层特征及影响因素[J].现代地质,2004,18(2):256-262.
[11]王来斌,徐怀民,蔡忠东.车镇凹陷北部陡坡带油气成藏规律研究[J].安徽理工大学学报(自然科学版),2005,25(4):1-3.
[12]张家震,毕彩芹,王新峰,等.车镇凹陷石油地质特征及勘探远景[J].海洋石油,2005,26(3):6-10.
[13]朱光有,金强,张水昌,等.车镇凹陷下第三系沙河街组生烃系统研究[J].天然气工业,2006,26(3):19-22.
[14]张家震.济阳坳陷车镇凹陷含油气系统研究[J].现代地质,2004,18(增刊):19-23.
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