徐家围子断陷营城组四段沉积相研究
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摘要
松辽盆地北部徐家围子断陷白垩系营城组砂砾岩是深层天然气勘探的主要目标层位。通过对营四段取芯井的岩芯观察,测井相和地震相分析,将营城组四段划分出两个三级层序,即营四下层序和营四上层序。营四段下层序属于多物源,其主要的沉积物多来自断陷四周的凸起,主要发育扇三角洲以及湖泊两种沉积相;而营四段上部地层南北向物源是主物源,北西和西南物源是次要物源,主要发育辫状河,辫状三角洲体系,扇三角洲沉积体系。
The matrix lithology of tight sandstone/gravel reservoirs at the member 4 of Yingcheng formation of Xujiaweizi in Songliao basin is main target stratum of deep gas prospectingThe member 4 of Yingcheng formation can be divided into the upper and the lower of the member 4 of yingcheng By the analysis of observation well-cores,logging and seismic facies.the lower sequence belongs to many source.The major sediments of it come from the convex around the graden basin .It is dominated by the depositional system of fan delta facies and lacustrine facies;while the sediments of the upper sequence come from the south and north of the graden basin.It's dominated by the depositional system of braided river facies,braided delta and fan delta facies.
The matrix lithology of tight sandstone/gravel reservoirs at the member 4 of Yingcheng formation of Xujiaweizi in Songliao basin is main target stratum of deep gas prospectingThe member 4 of Yingcheng formation can be divided into the upper and the lower of the member 4 of yingcheng By the analysis of observation well-cores,logging and seismic facies.the lower sequence belongs to many source.The major sediments of it come from the convex around the graden basin .It is dominated by the depositional system of fan delta facies and lacustrine facies;while the sediments of the upper sequence come from the south and north of the graden basin.It's dominated by the depositional system of braided river facies,braided delta and fan delta facies.
引文
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[4]迟元林,云金表,蒙启安,等.松辽盆地深部结构及成盆动力学与油气聚集[M].北京:石油工业出版社,2002:10~34.
[5]殷进垠,刘和甫,迟海江.松辽盆地徐家围子断陷构造演化[J].石油学报,2002,23(2):26~29.
[6]侯启军.松辽盆地北部深层断陷地质结构及演化研究[D].中国科学院研究生院,博士学位论文,2005.85~102.
[7]刘学锋,钟广法,王正允,等.松辽盆地北部徐家围子断陷构造格局及其成因.西安石油大学学报(自然科学版),2006,21(6):6~10.
[8]高瑞祺,蔡希源,等.松辽盆地大油田形成条件与分布规律[M].北京:石油工业出版社,1997:12~46.
[9]大庆油田石油地质志编辑委员会编.中国石油地质志(卷二、上)[M].北京:石油工业出版社,1993:23~15.
[10]韩用兵,王良书,刘绍文,等.渤海湾盆地济阳坳陷沙四段和孔店组地层剥蚀厚度恢复[J].高校地质学报,2004,10(3):440~450.
[11]牟中海,唐勇,崔炳富.塔西南地区地层剥蚀厚度恢复研究[J].石油学报,2002,23(1):40~44.
[12]赵红格,刘池洋.物源分析方法及研究进展[J].沉积学报.2003,21(3):9~15.
[13]顾家裕.陆相盆地层序地层学格架概念及模式[J].石油勘探与开发,1995,22(4):6~11.
[14]解习农,李思田.陆相盆地层序地层研究特点[J].地质科技情报,1993,12(1):22~26.
[15]Van Wagoner J C,Mittchum R M,Campion K M,etal.Siliciclastic sequencestratigraphy in well logs,coresandoutcrops:concepts for high-resolution correlation of time andfacies[A].Methods in Exploration Series[C].Tulsa:AAPG,1990.55.
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