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OALib Journal期刊
ISSN: 2333-9721
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四川公山庙油田致密砂岩油充注孔喉下限探讨及应用
Keywords: 公山庙油田,致密砂岩油,充注孔喉下限,理论计算,实验测试
Abstract:
？准确确定致密砂岩油充注孔喉下限有助于正确认识致密油成藏。对四川公山庙油田致密砂岩油充注孔喉下限进行理论推导和实验测试。源储界面致密油充注受生烃增压作用明显，基于流体力学作用间平衡关系和油藏实际参数，理论推导源储界面充注孔喉直径下限为29.06nm；储层内部充注力学机制与源储界面不同，生烃增压对流体充注的直接作用较弱，界面的力学推导过程不适用，而通过对实际砂岩样品进行环境扫描与能谱联测的方法确定储层内部的孔喉直径下限为59.66nm。结合致密砂岩储层压汞分析，应用充注孔喉下限确定源储界面附近的含油饱和度为69.5%；储层内部的含油饱和度为60.4%。含油饱和度预测值与公山庙油田致密砂岩实测含油饱和度相一致，对不同部位的孔喉下限的研究结果可为致密砂岩油分布规律和目标评价提供理论依据和预测方法。
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