珠江口盆地新近系层序划分与发育模式
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摘要
以经典层序地层学理论为指导,通过对地震、测井等资料的综合分析,归纳了具有珠江口盆地特色的层序界面划分标志及其特征,并在珠江口盆地新近系中识别出3个二级层序界面和12个三级层序界面,总结了层序界面特征形成的原因。利用层序划分结果建立珠江口盆地的层序格架,针对具有重要岩性油气藏意义的低位体系域,根据层序内部发育特征识别出低位体系域以扇-沟-楔为主、低位体系域以沟-楔为主和不发育低位体系域等3种层序模式。
Based on the guidance of classical sequence stratigraphic theory and comprehensive analysis on seismic and logging data,identification markers of sequence boundaries in Pearl River-mouth Basin were summarized and 3 second-order sequence boundaries and 12 third-order sequence boundaries were subdivided,and their formational reasons were obtained.The result of sequence division is used to establish a sequence framework of studied basin.Further more,3 types of low stand system tract patterns,such as fan-incised valley-wedge system,incised valley-wedge system and no low stand system tract are confirmed.
Based on the guidance of classical sequence stratigraphic theory and comprehensive analysis on seismic and logging data,identification markers of sequence boundaries in Pearl River-mouth Basin were summarized and 3 second-order sequence boundaries and 12 third-order sequence boundaries were subdivided,and their formational reasons were obtained.The result of sequence division is used to establish a sequence framework of studied basin.Further more,3 types of low stand system tract patterns,such as fan-incised valley-wedge system,incised valley-wedge system and no low stand system tract are confirmed.
引文
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[4]柳保军,庞雄,颜承志,等.珠江口盆地白云深水区渐新世-中新世陆架坡折带演化及油气勘探意义[J].石油学报,2011,32(2):234～242.
[2]郭彦如,刘化清,李相博,等.大型坳陷湖盆层序地层格架的研究方法体系——以鄂尔多斯盆地中生界延长组为例[J].沉积学报,2008,26(3):384～391.
[3]邢文礼,张尚锋,杜家元,等.稀疏井网条件下利用测井曲线识别层序界面方法探讨——以珠江口盆地珠江组为例[J].岩性油气藏,2010,22(2):111～115.
[4]柳保军,庞雄,颜承志,等.珠江口盆地白云深水区渐新世-中新世陆架坡折带演化及油气勘探意义[J].石油学报,2011,32(2):234～242.
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