摘要
通过大量的室内实验, 探讨了原油边界层厚度与毛管半径、压力梯度、流体粘度和组分的关系。边界层反映了储层、流体物性条件(储层孔隙度、渗透率、流体粘度、组分) 和开发条件(压力梯度) 的综合影响, 认为边界层厚度随着毛管半径的增大而减小; 在毛管半径相同的情况下, 边界层厚度随压力梯度的增大而减小, 最后达到一个临界值; 毛管半径一定时, 边界层厚度随粘度增加而增大; 极性组分含量越大, 吸附越明显, 边界层厚度越大; 边界层厚度越大, 非达西渗流特征越明显。最后通过毛管束模型给出了描述低渗透油藏单相流体非达西渗流特征的经验方程。
Through large amount of lab experiments, the relation of oil boundary layer thickness with capillary radius, pressure gradient, fluid viscosity and its composition has been discussed. The boundary layer can indicate the comprehensive influences of oil reservoirs,the physical properties (reservoir porosity, permeability, fluid viscosity and its composition) of inside fluids and development conditions such as pressure gradient: the layer thickness reduces with the rise of capillary radius;when capillary radius is fixed, the thickness increases with viscosity rise;the more polarity composition content is,the more obvious the absorption, the thicker the boundary layer,more and more obvious the characteristics of non-Darcy filtration. Finally by means of capillary bundle model,the empirical equation is given to describe the non-Darcy filtration features in single facies fluid of low permeability oil reservoirs.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2005年第2期57-59,77,i005,共5页
Petroleum Geology & Oilfield Development in Daqing
关键词
毛管半径
压力梯度
边界层
低渗透
非达西流
毛管束模型
capillary radius
pressure gradient
boundary layer
low permeability
non-Darcy flow
capillary bundle model
