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OALib Journal期刊
ISSN: 2333-9721
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气水过渡带内底水凝析气藏数值模拟研究——以吉拉克tⅱ2凝析气藏为例
Keywords: 吉拉克气田,气水过渡带,毛细管压力,饱和顺序,局部网格加密,数值模拟
Abstract:
？吉拉克tⅱ2底水凝析气藏构造幅度低，非均质性强，气藏顶部存在低电阻气层段，气水关系复杂。结合气藏地质和生产特征，对压汞资料分类评价并归一化处理计算气水过渡带高度，结果表明该气藏总体处于气水过渡带内，为气水过渡带内的底水凝析气藏。在对比各种建立气藏原始饱和度方法的基础上，采用毛细管压力法建立该气藏原始饱和度场并进行数值模拟研究。利用2种方法实现了产水气井的精细模拟：一是考虑饱和顺序对相对渗透率曲线影响，实现主要受可动水影响，初期见水且低产稳产水气井的精细模拟|二是采用局部网格加密准确描述反凝析与底水锥进对近井地带影响，实现主要受底水影响，见水后产水量逐渐增大的气井精细模拟。研究结果表明，这些方法对复杂凝析气藏模拟具有很好的效果，对同类气藏模拟具有重要的参考作用。
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