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Late Cenozoic faults and shallow oil accumulation in the Nanpu Sag

机译：南浦凹陷的晚新生代断裂和浅油积累

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The Nanpu Sag, located in the north part of Huanghua Depression of Bohai Bay Basin, is a Cenozoic petroliferous extensional sag, the shallow oil reservoirs have great exploration potential. Former exploration suggested that there is complex relationship between Late cenozoic faults and hydrocarbon accumulation, but there is no detailed discussion. Based on the structural interpretation of 3D seismic data, the Late Cenozoic fault characters including typical fault configuration in profile and fault arrays in plane are analyzed, furthermore, the formation mechanism of the faults is discussed. It is concluded that late Cenozoic faults were formed by extension other than strike-slip movement, which was controlled by the mechanism of pure shear in the lower crust during the period. In addition, the relationship between Late Cenozoic faults and shallow hydrocarbon accumulation is discussed, it indicates that the faults controlled the formation of shallow closures and constituted the effective hydrocarbon pathways connecting deep source rock and shallow traps.
机译：南浦凹陷位于渤海湾盆地黄花坳陷的北部，是一种新生代凡士热的延伸凹陷，浅水储层具有很大的勘探潜力。前勘探表明，晚纪岩体断层与碳氢化合物积累之间存在复杂的关系，但没有详细的讨论。基于3D地震数据的结构解释，分析了平面概况和故障阵列中的典型故障配置的后期新生代故障字符，此外，讨论了故障的形成机制。得出结论是，延伸的延伸运动后期新生代故障是由滑动运动的延伸形成，这是通过在该期间下层地壳中的纯剪切机制来控制的。此外，讨论了晚年中生代断裂和浅碳氢化合物积累之间的关系，表明故障控制了浅封闭的形成，并构成了连接深源岩和浅陷阱的有效碳氢化合物途径。

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