辽河坳陷东部凹陷中南部沙三段火山岩特征分析
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摘要
火山活动与盆地的构造活动密切相关,辽河坳陷东部凹陷沙三段沉积时期受深大断裂影响,火山岩广泛发育。通过岩心观察、薄片鉴定及测井识别,认为主要发育中、基性火山岩,代表岩石类型有玄武岩、安山岩、粗面岩及火山角砾岩等;以单井岩性识别及岩相划分为基础,结合古地磁及地震属性,分析了研究区沙三段火山岩岩相展布特征,建立了沙三段火山岩岩相模式;总结了火山岩岩相及岩性对火山岩储层发育程度的控制作用,为油田的勘探生产提供了依据。
The volcanic activity was closely related to the tectonic activities,the volcanic rocks were developed extensively because of the influence of deep faults during the deposition of the third member of Shahejie Formation.Through core observation,thin section identification and logging identification,it was considered that there mainly developed the intermediate and basic volcanic rocks,the representative rocks were the basalts,andesites,trachyte and volcanic breccia;based on single-well lithologic recognition and rock facies division and in combination with archaeomagnetism and seismic attribute,the distribution characteristics of the lithofacies of volcanic rocks were analyzed,the lithofacies mode of the volcanic rocks was established.The control action of lithofacies and lithology of volcanic rock to the reservoir development degree is summarized,which provides evidence for the oil exploration in oilfields.
The volcanic activity was closely related to the tectonic activities,the volcanic rocks were developed extensively because of the influence of deep faults during the deposition of the third member of Shahejie Formation.Through core observation,thin section identification and logging identification,it was considered that there mainly developed the intermediate and basic volcanic rocks,the representative rocks were the basalts,andesites,trachyte and volcanic breccia;based on single-well lithologic recognition and rock facies division and in combination with archaeomagnetism and seismic attribute,the distribution characteristics of the lithofacies of volcanic rocks were analyzed,the lithofacies mode of the volcanic rocks was established.The control action of lithofacies and lithology of volcanic rock to the reservoir development degree is summarized,which provides evidence for the oil exploration in oilfields.
引文
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