摘要
主要目的是通过岩心驱油实验和扫描电镜实验,研究驱油效率的主要微观影响因素.取大庆油田不同渗透率级别天然岩心,首先进行室内实验,确定岩心的水驱采收率.而后对进行了驱油实验的岩心进行处理,进行电镜扫描实验,通过统计分析颗粒、孔隙、喉道等参数,分析其分布特点.再利用多元回归分析,建立岩心水驱采收率与岩心孔隙微观参数的关系.通过结果分析可以看出,孔喉比、形状因子对采收率的影响最大,是低渗透油田水驱采收率低的主要原因.
The objective of this paper is to study the main microcosmic factors for water flooding efficiency by core water flooding experiment and scanning electron microscope exper- iment. The first step is to identify the water flooding efficiency by experiment for different permeability natural cores of Daqing oilfield. Then all cores were transferred to do scanning electron microscope experiment. We can analyze their distribution through statistical analysis of particles, pores, throat and other paramet6rs. Eventually, the relationship between water flooding efficiency and pore structure was built by multiple regression analysis. Pore throat ratio and shape-dependent constant is the greatest impact on recovery, and also is the main reason for lower water fldoding efficiency of low permeability reservoir.
出处
《数学的实践与认识》
北大核心
2015年第17期127-131,共5页
Mathematics in Practice and Theory
关键词
多元回归
驱油效率
孔隙结构
multiple regression analysis
flooding efficiency
pore structure
