珠江口盆地番禺隆起东南缘断裂坡折带及其对低位域构造—岩性油气藏的控制作用
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摘要
番禺隆起是珠江口盆地中南部的一个重要含油气区。区内新近系沉积期主要发育NW向和近EW向的同沉积断裂,它们的发育和分布控制着沉积充填和总体的古构造地貌特征。古隆起的东南和东北缘发育的主要同沉积断裂形成明显的古地貌突变带或断裂坡折带。东南缘的主控断裂是由裂陷期发育的缓坡反向断裂所形成的,构成了番禺隆起与白云深凹带的分界。地震相、地震属性等分析和追踪其分布范围揭示出,珠海组、珠江组中下部层序的低位域三角洲砂体沿断裂坡折带下斜坡呈裙带状分布。研究指出断裂坡折带下斜坡低位域具有形成构造—岩性油气藏的良好条件,并为该区近期的勘探突破提供了重要依据。
The Panyu Uplift is an important oil and gas-bearing district in central south Pearl River Mouth Basin.A series of northwest and east-west striking syndepositional faults were developed during Neogene,and their development and distribution controlled the paleo-structural framework and the sedimentary filling pattern.The main syndepositional faults along the southeastern and northeastern margins of the ancient uplift formed obvious geo-morphologic abrupt zones or fault slope-break zones.The main controlling faults in the southeastern part were formed by the antithetic faults in the hinge gentle slope which were developed during synrifting and formed the boundary between Panyu Uplift and Baiyun deep sag.An analysis of seismic facies and seismic attributes has shown that the lowstand system tract deltaic sandstones in the middle-lower part of Zhuhai and Zhujiang Formations were developed and distributed along the low slope of the fault slope-break zone.Researches indicate that the low slope lowstand system tracts along the fault slope-break zone constitute a favorable condition for the formation of lithostratigraphic or structural-stratigraphic traps.This study hence has offered an important basis for the recent exploration breakthrough in this area.
The Panyu Uplift is an important oil and gas-bearing district in central south Pearl River Mouth Basin.A series of northwest and east-west striking syndepositional faults were developed during Neogene,and their development and distribution controlled the paleo-structural framework and the sedimentary filling pattern.The main syndepositional faults along the southeastern and northeastern margins of the ancient uplift formed obvious geo-morphologic abrupt zones or fault slope-break zones.The main controlling faults in the southeastern part were formed by the antithetic faults in the hinge gentle slope which were developed during synrifting and formed the boundary between Panyu Uplift and Baiyun deep sag.An analysis of seismic facies and seismic attributes has shown that the lowstand system tract deltaic sandstones in the middle-lower part of Zhuhai and Zhujiang Formations were developed and distributed along the low slope of the fault slope-break zone.Researches indicate that the low slope lowstand system tracts along the fault slope-break zone constitute a favorable condition for the formation of lithostratigraphic or structural-stratigraphic traps.This study hence has offered an important basis for the recent exploration breakthrough in this area.
引文
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CHEN Ying,LIN Chang-song,YU Hong-zhong,CUI Yong-gang.2006.Controls of Paleogene syndepositional faults on thesuccessions and depositional systems in the Qikou depression,Bohai Bay[J].Journal of Geomechanics,12(3):378-386(in Chinese with English abstract).
FENG You-liang,XU Xiu-sheng.2006.Syndepositional structural slope-break zone controls on lithologic reservoirs:A case from Paleogene Bohai Bay Basin[J].Petroleum Exploration and Development,33(1):22-31(in Chinese with English abstract).
LIN Chang-song,PAN Yuan-lin,XIAO Jian-xin,KONG Fan-xian,LIU Jing-yan,ZHENG He-rong.2000.Structural slope-break zone:Key concept for stratigraphic sequence analysis and pe-troleum forecasting in fault subsidence basins[J].Earth Sci-ence,25(3):260-266(in Chinese with English abstract).
LIN Chang-song,ZHANG Yan-mei,LI Si-tian.2002.Quantita-tively modeling of multiple stretching of lithosphere and deep thermal history of some tertiary rift basins in east China[J].Acta Geologica Sinica,76(3):324-330.
LIN Chang-song,ZHENG He-rong,REN Jian-ye,LIU Jing-yan,QIU Yi-gang.2003.The Control of syndepositional faulting on the Eogene sedimentary basin fills of the Dongying and Zhanhua sags,Bohai Bay Basin[J].Science in China(D),33(11):1025-1036(in Chinese with English abstract).
LIU Jing-yan,LIN Chang-song,JIANG Liang,CHEN Zhi-yong.2000.Characteristics of Tertiary inversion structures and their influence on oil-gas accumulation in Xihu Trough,East China Sea[J].Acta Geoscientica Sinica,21(4):350-355(in Chinese with English abstract).
REN Jian-ye,LU Yong-chao,ZHANG Qing-lin.2004.Forming mechanism of structural slope-break and its control on se-quence style in faulted basin[J].Earth Science,29(5):596-602(in Chinese with English abstract).
REN Jian-ye,ZHANG Qing-lin,LU Yong-chao.2004.Arc-shaped fault break slope system and its control on low stand systems sandbodies in Dongying Depression[J].Acta Sedimentologica Sinica,22(4):628-635(in Chinese with English abstract).
冯有良,徐秀生.2006.同沉积构造坡折带对岩性油气藏富集带的控制作用——以渤海湾盆地古近系为例[J].石油勘探与开发,33(1):22-31.
林畅松,潘元林,肖建新,孔凡仙,刘景彦,郑和荣.2000.构造坡折带——断陷盆地层序分析和油气预测的重要的概念[J].地球科学,25(3):260-266.
林畅松,郑和荣,任建业,邱以刚.2003.渤海湾盆地东营、沾化凹陷早第三纪同沉积断裂作用对沉积充填的控制[J].中国科学(D),33(11):1025-1036.
刘景彦,林畅松,姜亮,陈志勇.2000.东海西湖凹陷第三系反转构造及其对油气聚集的影响[J].地球学报,21(4):350-355.
任建业,陆永潮,张青林.2004.断陷盆地构造坡折带形成机制及其对层序发育样式的控制[J].地球科学,29(5):596-602.
任建业,张青林,陆永潮.2004.东营凹陷弧形断裂坡折带系统及其对低位域砂体的控制[J].沉积学报,22(4):628-635.
CHEN Ying,LIN Chang-song,YU Hong-zhong,CUI Yong-gang.2006.Controls of Paleogene syndepositional faults on thesuccessions and depositional systems in the Qikou depression,Bohai Bay[J].Journal of Geomechanics,12(3):378-386(in Chinese with English abstract).
FENG You-liang,XU Xiu-sheng.2006.Syndepositional structural slope-break zone controls on lithologic reservoirs:A case from Paleogene Bohai Bay Basin[J].Petroleum Exploration and Development,33(1):22-31(in Chinese with English abstract).
LIN Chang-song,PAN Yuan-lin,XIAO Jian-xin,KONG Fan-xian,LIU Jing-yan,ZHENG He-rong.2000.Structural slope-break zone:Key concept for stratigraphic sequence analysis and pe-troleum forecasting in fault subsidence basins[J].Earth Sci-ence,25(3):260-266(in Chinese with English abstract).
LIN Chang-song,ZHANG Yan-mei,LI Si-tian.2002.Quantita-tively modeling of multiple stretching of lithosphere and deep thermal history of some tertiary rift basins in east China[J].Acta Geologica Sinica,76(3):324-330.
LIN Chang-song,ZHENG He-rong,REN Jian-ye,LIU Jing-yan,QIU Yi-gang.2003.The Control of syndepositional faulting on the Eogene sedimentary basin fills of the Dongying and Zhanhua sags,Bohai Bay Basin[J].Science in China(D),33(11):1025-1036(in Chinese with English abstract).
LIU Jing-yan,LIN Chang-song,JIANG Liang,CHEN Zhi-yong.2000.Characteristics of Tertiary inversion structures and their influence on oil-gas accumulation in Xihu Trough,East China Sea[J].Acta Geoscientica Sinica,21(4):350-355(in Chinese with English abstract).
REN Jian-ye,LU Yong-chao,ZHANG Qing-lin.2004.Forming mechanism of structural slope-break and its control on se-quence style in faulted basin[J].Earth Science,29(5):596-602(in Chinese with English abstract).
REN Jian-ye,ZHANG Qing-lin,LU Yong-chao.2004.Arc-shaped fault break slope system and its control on low stand systems sandbodies in Dongying Depression[J].Acta Sedimentologica Sinica,22(4):628-635(in Chinese with English abstract).
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