珠江口盆地西部珠江组潮流砂脊的分布、形态和水动力机制
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摘要
综合地震、钻井及测井资料,运用层序地层学理论,研究认为珠江口盆地西部珠江组一段上部泥质粉砂岩低阻油层砂体为潮流砂脊砂体,对潮流砂脊的形态与平面展布特征进行了研究,探讨了潮流砂脊的水动力特点与形成机制,并在珠江组一段上部识别出四期水道,分析了潮流水道的分布及井震特征。指出水道内潮流砂脊构造-岩性圈闭和水道侧向遮挡构造-岩性圈闭两种有利的潮流砂脊隐蔽圈闭。
An integration of seismic,drilling and logging data with sequence stratigraphic theories reveals that the oil-bearing argillaceous siltstones of low-resistivity at the upper part of the first member of the Zhujiang Formation in western Zhujiangkou Basin are tidal sand ridges.This paper studies their geometry and planar distribution,and discusses their hydrodynamic features and forming mechanism.Four stages of water channels are identified in the upper part of the first member of the Zhujiang Formation,and their distribution as well as logging and seismic characteristics are also analyzed.It is suggested that there are two kinds of potential subtle traps:intra-channel tidal sand ridge structural-stratigraphic traps and channel lateral-sealing structural-stratigraphic traps.
An integration of seismic,drilling and logging data with sequence stratigraphic theories reveals that the oil-bearing argillaceous siltstones of low-resistivity at the upper part of the first member of the Zhujiang Formation in western Zhujiangkou Basin are tidal sand ridges.This paper studies their geometry and planar distribution,and discusses their hydrodynamic features and forming mechanism.Four stages of water channels are identified in the upper part of the first member of the Zhujiang Formation,and their distribution as well as logging and seismic characteristics are also analyzed.It is suggested that there are two kinds of potential subtle traps:intra-channel tidal sand ridge structural-stratigraphic traps and channel lateral-sealing structural-stratigraphic traps.
引文
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14吴小红,吕修详,周心怀,等.黄河口凹陷浅水三角洲沉积特征及其油气勘探意义[J].石油与天然气地质,2010,31(2):165～172
15吴光华,王红亮,林会喜,等.渤海湾盆地埕岛地区东营组沉积特征及其油气地质意义[J].石油与天然气地质,2009,30(1):33～40
16Trentesaux A,Berne S,Stolk A.Sedimentology and stratigraphy of a tidal sand bank in the southern North Sea[J].Marine Geology,1999,159(1-4):253-272
17Dyer K R,Huntley D A.The origin,classification and modelling of sand banks and sand ridges[J].Continental Shelf Research,1999,19(10):1285-1330
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19蔡李梅,陈红汉,李纯泉,等.济阳坳陷东营凹陷沙三中亚段流体包裹体古流体势场恢复[J].石油与天然气地质,2009,30(1):17～25
2夏东升,刘振夏.潮流砂脊的形成机制和发育条件[J].海洋学报,1984,6(3):361～367
3刘振夏,夏东兴等.中国陆架潮流沉积体系和模式[J],海洋与湖沼,1998,28(2):141～147
4杨子赓,王圣洁.冰消期海侵进程中南黄海潮流沙脊的演化模式[J].海洋地质与第四纪地质,2001,21(3):1～10
5刘振夏.江苏潮流沙的粒度特征及沉积环境的研究[J].海洋地质与第四纪地质,1983,3(4):25～33
6黄易畅,王文清.江苏沿岸辐射状沙脊的动力机制探讨[J].海洋学报,1987,9(2):209～215
7张光威.南黄海陆架沙脊的形成与演变[J].海洋地质与第四纪地质,1991,11(2):25～35
8陈欢庆,朱筱敏,董艳蕾,等.深水断陷盆地层序地层分析与岩性-地层油气藏预测——以中国南海C盆地深水区古近系T组为例[J].石油与天然气地质,2009,30(5):626～634
9Liu Zhenxia,Xia Dongxing,Berne S,et al.Tidal deposition sys-tems of China’s continental shelf,with special reference to the eastern Bohai Sea[J].Marine Geology,1998,145(3-4):225-253
10印萍.东海陆架冰后期潮流沙脊地貌与内部结构特征[J].海洋科学进展,2003,21(2):181～187
11慕德梁,孟卫工,李成,等.断陷盆地陡坡带构造样式与油气聚集——以渤海湾盆地辽河坳陷西部凹陷陡坡带为例[J].石油与天然气地质,2009,30(5):635～642
12Posamentier H W.Ancient shelf ridges—a potentially significant component of the transgressive systems tract:case study from off-shore northwest Java[J].AAPG Bulletin,2002(86):75-106
13Caston V N D,Stride A H.Tidal sand movement between some linear sand banks in the North Sea off northeast Norfolk[J].Ma-rine Geology,1970,9(5):38-42
14吴小红,吕修详,周心怀,等.黄河口凹陷浅水三角洲沉积特征及其油气勘探意义[J].石油与天然气地质,2010,31(2):165～172
15吴光华,王红亮,林会喜,等.渤海湾盆地埕岛地区东营组沉积特征及其油气地质意义[J].石油与天然气地质,2009,30(1):33～40
16Trentesaux A,Berne S,Stolk A.Sedimentology and stratigraphy of a tidal sand bank in the southern North Sea[J].Marine Geology,1999,159(1-4):253-272
17Dyer K R,Huntley D A.The origin,classification and modelling of sand banks and sand ridges[J].Continental Shelf Research,1999,19(10):1285-1330
18Bartek L R,Wellner R W.Do equilibrium conditions exist during sediment transport studies on continental margins-—an example from the East China Sea[J].Geo-Marine Letters,1995,15(1):23-29
19蔡李梅,陈红汉,李纯泉,等.济阳坳陷东营凹陷沙三中亚段流体包裹体古流体势场恢复[J].石油与天然气地质,2009,30(1):17～25
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