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地质学报  2009 

从断层岩的角度认识泥岩涂抹及其定量表征――以济阳坳陷东辛油田营32断层为例

, PP. 426-434

Keywords: 断层封闭性,断层岩,泥岩涂抹,岩石流变性,营32断层

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Abstract:

从断层岩入手,分析了断层岩与断层封闭性的相关性,进一步建立起断层岩纵向类型变化与断层封闭性的关系。根据断层岩的类型及含油气沉积盆地的埋深,把泥岩涂抹类型分为未成岩塑性剪切型泥岩涂抹及成岩脆性研磨型泥岩涂抹。根据岩石纵向流变性,把断层封闭性分为浅层高渗封闭开启段、中层碎裂封闭开启段及下层韧性变形封闭段,并加以对比与剖析。探讨了泥岩涂抹定量表征问题,指出不同泥岩涂抹类型应采取的计算方法及目前研究中存在的问题。对东辛油田营32断层的泥岩涂抹研究表明,该断层南段几个重要含油层位的封闭性不好,导致油气穿越断层,发生了油气再运移,而北段所有含油层位都是封闭的。这说明了同一条断层封闭的差异性及动态性。

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