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王岚. 东海平北工区温度压力特征和油气运聚[J]. 海洋石油, 2000, 20(2): 22-27.
引用本文: 王岚. 东海平北工区温度压力特征和油气运聚[J]. 海洋石油, 2000, 20(2): 22-27.
Wang Lan. Features of Temperature and Pressure,Migration and Accumulation of Hydrocarbon in Pingbei Area, the East China Sea[J]. Offshore oil, 2000, 20(2): 22-27.
Citation: Wang Lan. Features of Temperature and Pressure,Migration and Accumulation of Hydrocarbon in Pingbei Area, the East China Sea[J]. Offshore oil, 2000, 20(2): 22-27.

东海平北工区温度压力特征和油气运聚

Features of Temperature and Pressure,Migration and Accumulation of Hydrocarbon in Pingbei Area, the East China Sea

  • 摘要: 从包体测温和镜质体反演资料推测平北工区经历了高于今地温梯度的热历史,这对平湖组烃源岩或深部烃源岩演化有利。包体均-温度具有双峰特征,反映了平湖组储层至少经历了两期烃类充注。平北工区超压现象很普遍,异常压力油气层位于平中和平下段,平面上断层的展布影响着超压的分布。超压的存在意味着更好的物性条件和更好的保存条件。流体封存箱及箱顶部压力相对较低处都是油气聚集的有利场所。气相是主要的运移相态。浮力不仅可以作为油气从源岩进入储集岩的动力,还可能造成油气圈闭的破坏。

     

    Abstract: From inclusion and Ro data, it is clear that Pingbei strata had undergone a higher temperature gradient in geological history, which is favorable for source rock evolution. The equilibrium temperatures of inclusion in Pingbei area are characterized by double peak, which means at least two session of hydrocarbon filling occurred in the reservoir of Pinghu Formation. The abnormal pressure is prevalent in the middle and lower part of Pinghu Formation. The distribution of faulting system controlled the lateral distribution of abnormal pressure. The existence of abnormal pressure can better the reservoir quality and hydrocarbon preserving condition. The phase of hydrocarbon migration in Pingbei area is mainly gas. Buoyancy can be the driving force for petroleum migration, on the other hand, it can also cause damage for hydrocarbon pool.

     

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