石油实验地质Issue(5)：583-586,4.DOI:10.11781/sysydz201305583
低渗油藏CO2混相驱启动压力梯度实验研究
Experimental study on threshold pressure gradient of CO2 miscible flooding in low permeability reservoir
摘要
Abstract
Threshold pressure gradient exists in the development of low permeability reservoir. The process of CO2 miscible flooding is very complicated, demanding further research. It can be divided into 4 zones including original oil phase zone, frontal phase zone of gas injection, miscible oil phase zone and trailing phase zone of gas injection. Indoor short core experiments are used to study the threshold pressure gradient of different flooding. Studies show that the pressure gradient-flow diagrams of low permeability core are in concave distribution which is divided to nonlinear flow and linear flow. The main factors of threshold pressure gradient are fluid viscosity, effective permeability, fluid density, gas oil ratio, and so on. The threshold pressure gradient and core perme-ability are based on power function, and the index is about -0. 482.关键词
低渗透油藏/CO2 混相驱/启动压力梯度/驱替相带/渗透率Key words
low permeability reservoir/CO2 miscible flooding/threshold pressure gradient/displacement phase zone/permeability分类
能源科技引用本文复制引用
章星,杨胜来,文博,李芳芳,陈浩,聂向荣,丁景臣..低渗油藏CO2混相驱启动压力梯度实验研究[J].石油实验地质,2013,(5):583-586,4.基金项目
国家重点基础研究发展计划(973计划)项目(2011CB707300)资助。 （973计划）
