东营凹陷永安镇油田沙三段“槽谷”砂体发育规律研究
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摘要
针对砂岩、砾岩岩性油气藏发育和分布规律这一难题,以东营凹陷永安镇油田沙三段"槽谷"砂体为例,对"槽谷"砂体进行了研究。"槽谷"砂体是主要以扇三角洲前缘砂体为主的1套在断陷湖盆陡坡带发育的一种砂体。在地震剖面上,砂体在横向上超覆尖灭在下伏沉积物之上,电性特征明显,SP曲线上砂体由下而上为齿化漏斗形、多个高幅齿化箱形、齿化箱形与齿化钟形。"槽谷"砂体储层不管在横向上还是在纵向上都有较大的变化:纵向上,砂体的厚度变化大;横向上,砂体的连续性很差。其成因为沉积物向盆地充填过程中,遇到北西西向延伸的断槽,沿着这些断槽向西进入湖盆,并在断槽内形成扇三角洲前缘沉积。
In this paper,we researched the trough valley sand body in sand and glutenite reservoir.The trough valley sand body was composed of front sand body of fan-delta in the fault depression.On the seismic profile,the sand body was pinched out at sedimentary body underlying.The electric feature of the sand body was obvious.From bottom to top,the SP curve of sand body was tooth-infundibular form,high amplitude tooth-box form,and tooth-campaniform,respectively.The reservoir of trough valley sand body was various laterally and vertically.The thickness of sand body was vertically changed,in contrast that the continuity was laterally bad.Because the sediments along the trough fault came into the fault depression and formed the front intrafacies of the fan-delta when they encountered the NW extended trough.
In this paper,we researched the trough valley sand body in sand and glutenite reservoir.The trough valley sand body was composed of front sand body of fan-delta in the fault depression.On the seismic profile,the sand body was pinched out at sedimentary body underlying.The electric feature of the sand body was obvious.From bottom to top,the SP curve of sand body was tooth-infundibular form,high amplitude tooth-box form,and tooth-campaniform,respectively.The reservoir of trough valley sand body was various laterally and vertically.The thickness of sand body was vertically changed,in contrast that the continuity was laterally bad.Because the sediments along the trough fault came into the fault depression and formed the front intrafacies of the fan-delta when they encountered the NW extended trough.
引文
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[2]Feng Youliang.Lower Tertiary sequence stratigraphic frame-work and basin filling model in Dongying depression[J].Earth Science:Journal of China University of Geosciences,1999,24(6):636-638.[冯有良.东营凹陷下第三系层序地层格架及盆地充填模式[J].地球科学:中国地质大学学报,1999,24(6):636-638.]
[3]Ji Youliang,Zhang Shiqi.The Sequence Stratigraphic Modelsof the Fault-Depression Lake Basin[M].Beijing:PetroleumIndustry Press,1996:73-78.[纪友亮,张世奇.陆相断陷湖盆层序地层学[M].北京:石油工业出版社,1996:73-78.]
[4]Zhu Guangyou,Jin Qiang,Zhou Jianlin,et al.Study on the in-filling patterns of lacustrine basins in the Dongying depression[J].Petroleum Geology&Experiment,2003,25(2):143-148.[朱光有,金强,周建林,等.渤海湾盆地东营断陷湖盆充填模式研究[J].石油实验地质,2003,25(2):143-148.]
[5]Ma Lijuan,Xie Xinong,Ren Jianye.Controlling of Dongyingsag structure on the Tertiary sedimentary sands bodies[J].Petroleum Exploration and Development,2002,29(2):64-66.[马丽娟,解习农,任建业.东营凹陷古构造对下第三系储集体的控制作用[J].石油勘探与开发,2002,29(2):64-66.]
[6]Wang Jufeng.Sedimentary facies of the Shahejie Formation of Pa-leogene in Dongying sag,Jiyang depression[J].Journal of Palaeo-geography,2004,6(4):45-57.[王居峰.济阳坳陷东营凹陷古近系沙河街组沉积相[J].古地理学报,2004,6(4):45-57.]
[7]Cao Zhenglin,Gou Yingchun,Zheng Hongjun,et al.Sedimen-tary characteristics and controlling factors of lower Creta-ceous nearshore subaqueous fans in Jiuxi depression[J].Natu-ral Gas Geoscience,2009,20(6):896-901.[曹正林,苟迎春,郑红军,等.酒西坳陷下白垩统近岸水下扇沉积特征及控制因素分析[J].天然气地球科学,2009,20(6):896-901.]
[8]Li Minggang,Pang Xiongqi,Qi Jiafu,et al.The distributioncharacteristic and model of the sand lithologic hydrocarbonreservoir in Dongying sag[J].Petroleum Geology and Recov-ery Efficiency,2008,15(2):10-13.[李明刚,庞雄奇,漆家福,等.东营凹陷砂岩岩性油气藏分布特征及成藏模式[J].油气地质与采收率,2008,15(2):10-13.]
[9]Yan Peng,Wang Liuzhu,Yu Zhaohua,et al.Strike-slip struc-tural feature and its influence on the hydrocarbon accumula-tion in Kendong area,Jiyang depression[J].Natural Gas Geo-science,2009,20(1):100-107.[兖鹏,王六柱,余朝华,等.济阳坳陷垦东走滑断裂构造特征及其对油气成藏的影响[J].天然气地球科学,2009,20(1):100-107.]
[10]Zhuang Li.Reseatch on the sequence stratigraphy and deposi-tion system in Yonganzhen delta,the Dongying sag[J].Petro-leum Geology&Experiment,2006,28(6):544-548.[庄丽.东营凹陷永安镇三角洲层序地层与沉积体系[J].石油实验地质,2006,28(6):544-548.]
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