珠江口盆地白云凹陷陆坡区有利成藏组合带
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摘要
应用长排列大容量震源所获得的穿过珠江口盆地白云凹陷陆坡区主体的地震剖面,并结合邻区钻井资料,对珠江口盆地白云凹陷陆坡区的油气成藏组合进行了分析,识别出5个有利的成藏组合带,这些成藏组合带不仅有构造圈闭,而且还有大型的地层和岩性圈闭。这5 个主要的有利成藏组合带包括:①重力滑动前缘背斜带是最有利的成藏组合带,储层层位多,圈闭构造不仅面积大,而且横向上延伸规模大,砂岩储层巨厚;②同沉积背斜圈闭带储层层位物性好,封堵条件良好,断裂构造和岩性组合非常有利;③纵向水道泥质充填封堵地层圈闭带规模大,封堵条件好,属于岩性圈闭;④反向屋脊断块圈闭带储层层位多,油源断裂发育,与上述 3 种成藏组合相比较圈闭面积较小;⑤低位海底扇大中型岩性圈闭带是多处发育且非常有利的圈闭带。
The oil/gas play characteristics of Baiyun depression slope in the Pearl River mouth basin have been studied according to the seismic profiles obtained from Baiyun depression slope and data of drilling around this area.Five fine play zones with various types of traps such as structural trap, stratigraphic trap and big lithologic trap can be distinguished. The characteristics of the five play zones are:① the anticline play zone made by gravity slipping of many thick sand reserves and the large area of structural trap far stretching in the horizon, which is the best play zone;②synsedimentary anticline play zone with reservoirs of good physical nature, good condition of plug-back and beneficial association of fault structure and lithology;③longitudinal-channel mud-filling play zone with large trap area and fine condition of plug-back;④ reversed fault-anticline structure play zone with multiple-layer reservoirs and faults for oil/gas migration;⑤widely-developed lithologic play zone formed by submarine-fans in low water level.
The oil/gas play characteristics of Baiyun depression slope in the Pearl River mouth basin have been studied according to the seismic profiles obtained from Baiyun depression slope and data of drilling around this area.Five fine play zones with various types of traps such as structural trap, stratigraphic trap and big lithologic trap can be distinguished. The characteristics of the five play zones are:① the anticline play zone made by gravity slipping of many thick sand reserves and the large area of structural trap far stretching in the horizon, which is the best play zone;②synsedimentary anticline play zone with reservoirs of good physical nature, good condition of plug-back and beneficial association of fault structure and lithology;③longitudinal-channel mud-filling play zone with large trap area and fine condition of plug-back;④ reversed fault-anticline structure play zone with multiple-layer reservoirs and faults for oil/gas migration;⑤widely-developed lithologic play zone formed by submarine-fans in low water level.
引文
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[4] 翟光明.沿海大陆架及毗邻海域油气区[J].中国石油地质志,1992,16:101—165.[ZHAI Guang ming.The oil/gas districtalong the shelf and adjacent regions[J].PetroleumGeologicalTopography,1992,16:101—165.]
[5] GardenerM H,BorerJ M.Submarine channel architecture a long a slope to basin profile,BrushyCanyonFormation,WestTexas[A ].FineGrainedTurbiditeSystems[C ].AAPGMemoir72/SEPM SpecialPublication,2000,68:195—214.
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