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地质论评  2001 

静水条件下背斜圈闭系统石油运移和聚集模拟实验及机理分析

Keywords: 背斜圈闭模拟实验非均质砂层油气运移油气聚集静水条件

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Abstract:

静水条件下背斜圈闭系统石油运移和聚集的模拟实验表明:(1)不同砂层组合方式的背斜圈闭系统中,油的运移方向、路径和通道不同,其中,均质和反韵律砂层组成的背斜圈闭系统油的运移方向、路径和通道比较简单,而正韵律组成的背斜圈闭系统中油的运移方向、路径和通道比较复杂;(2)油的充注速率对油的运移方向、路径和通道具有重要的影响,当充注速率较小时,油仅在一些渗透率较高的砂层中运移,当充注速率较大并超过渗透率较高的砂层的运载能力时,则油可以进入一些渗透率较低的砂层;(3)运载层的岩性组合和渗透率级差以及油充注速率和充注方向等对油气运移的散失量和运移效率产生重要的影响,一般来说,反韵律砂层组成的背斜圈闭系统中油的运聚效率较高,均质砂层组成的背斜圈闭系统次之,而正韵律砂层组成的背斜圈闭系统中油的运聚效率比较低;(4)油的运移形式表现为跳跃和脉动的特点。

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