摘要
相对于常规油藏,低渗透油藏具有特殊的开发规律,其实质是渗流规律的特殊性。因此对低渗透油藏渗流规律进行研究具有重要的意义。通过室内岩心单相渗流实验,研究了不同渗透率、不同流体粘度、不同流体成分的条件下低渗透岩心的渗流规律。实验结果表明,在低渗透油藏中流体的流动呈现出非线性特征,存在启动压力梯度。启动压力梯度随渗透率增大而减小,随流体粘度升高而增大。启动压力梯度与流体的组成有关。
Compared with conventional reservoir,the development of low permeability reservoir has some special laws,the essence of which is the uniqueness of seepage.Thus the research on the nonlinear flow in low permeability is valuable.Through laboratory core single-phase flow experiments,we can learn the law of nonlinear flow in low permeability,because the flow of low permeability exists gradient of threshold pressure in different permeability,fluid viscosity and composition of fluid.The experiment result shows that the diminution of gradient of threshold pressure accompanies with the increase of permeability or the decrease of viscosity,and it is also in connection with the composition of fluid.
出处
《新疆石油天然气》
CAS
2008年第3期53-55,共3页
Xinjiang Oil & Gas
关键词
低渗透
非线性
启动压力梯度
粘度
low permeability
nonlinear
gradient of threshold pressure
viscosity
