基于灰色定权聚类的微观水驱油模型实验特低渗透储层流动单元划分及评价Division and Evaluation of Flow Units by Means of Sandstone Micro-model for Water-Oil Displacement Experiment Based on Grey Fixed Weight Clustering Method
黄进腊;孙卫;
摘要(Abstract):
为研究微观水驱油模型流动单元划分及评价的可行性和效果,应用灰色定权聚类方法,以吴起油田X井区特低渗透长63储层25块样品为例,采用真实砂岩微观水驱油模型实验,以测得的渗透率、水驱前含油饱和度、启动压力、1 PV驱油效率以及孔隙度5项参数为基础,将样品划分为Ⅰ类、Ⅱ类和Ⅲ类流动单元。Ⅰ类、Ⅱ类和Ⅲ类流动单元分别与水下分流河道、河口坝、远砂坝微相类型相吻合。结合实验动态观察和数据分析,不同类型的流动单元有着不同的渗流通道、驱替方式、孔喉特征、驱油效率以及压力增加对驱油效率的敏感程度。灰色定权聚类方法具有较好的综合判别能力,为流动单元的划分及评价提供了一条新的思路。
关键词(KeyWords): 灰色系统;灰色聚类方法;砂岩微观水驱油模型实验;流动单元;驱油效率;孔喉特征
基金项目(Foundation): “十一五”国家科技支撑计划(2007BAB17B02);; 国家“973”项目(2003CB214606)
作者(Author): 黄进腊;孙卫;
Email:
DOI:
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