摘要
根据多孔介质中的流体渗流理论和岩电理论，利用数值计算方法，对淡水泥浆滤液侵入地层后的导电性能进行了定量计算．结果表明，泥浆侵入条件下地层电阻率的径向分布并非象以往的阶跃模型所描述的那样呈阶梯状突变，而是随时间增加呈复杂的变化趋势．在侵入初期，井眼附近存在高电阻率尖峰，在侵入带和未侵入带之间存在一个低电阻率的环带．本文还进一步研究了在泥浆滤液连续侵入储集层的条件下，该低电阻率环带以及地层电阻率分布随时间的演变．
quantitative calculation of electrical conductivity for fresh water mud filtrate invaded reservoir is carried out with numerical method in the light of percolation in porous media and rock physics.It is shown that the radial resistivity of formation does not have a perfect piston-like profile described as the'step profile'model,but it has a complex destribution and varies with the invasion time. An annular zone possessing low resistivity will form between the uninvaded zone and the invaded zone.Besides,the features that the annular zones and the resistivity profiles of the formation vary with time are studied in this paper when mud filtrate invades a reservoir continuously.
出处
《西安石油学院学报》
1994年第1期35-38,共4页
Journal of Xi'an Petroleum Institute
