鄂尔多斯盆地中生界延长组低渗透致密油藏充注模式测井识别

Well Logging Technology(2016)

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Abstract
油藏充注模式是指从烃源岩生成的原油,在驱动力作用下向储集层选择性持续注入形成油藏的过程.油藏充注模式与油源条件、储层物性、成藏动力三者耦合有关.鄂尔多斯盆地中生界延长组发育典型低渗透-致密砂岩油藏和低幅度构造-岩性油藏.根据源储配置关系、砂体充满度和最大有效含油体积的相对高低,将油藏充注模式划分为过充注、正常充注和欠充注3种类型.分析了不同充注模式油藏形成的原因及含油性、有效储层下限变化规律.针对不同充注模式油藏建立了解释结论序列和针对性测井解释方法,大幅度提高了低渗透-致密储层的测井判识能力.
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Key words
log interpretation,filling mode of reservoir,relationship of source rock and reservoir,reservoir lower limit,low permeability-tight reservoir,Ordos basin
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