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关于固体悬浮物侵入造成的地层伤害,已有一些研究人员做了大量研究工作,并在文献上发表了一些模型的建立方法,特别是高效介质理论和二维或三维毛细管网络中的渗透理论的应用.本文介绍了一个以颗粒通过多孔介质的物料平衡为基础的新的数字模型,对线性模型和辐射模型均做了介绍.尽管导出的差分方程是以定积分形式表示的,但模型对不同参数，如流体中颗粒的浓度、注入速率以及固体颗粒的密度等,与侵入深度和侵入时间的关系的适用性有着明显的不同.模拟并计算结果与在带有多个测压口的岩心夹持器里进行的岩心实验数据吻合较好.实验中采用了长度为80mm的砂质岩心.辐射模型可用于模拟注水井里的地层伤害,而线性模型可用于工业水净化及油田注水处理的过滤系统.
A number of researchers have done a great deal of work on the formation damage caused by the intrusion of solid suspended matter. Some models have been published in the literature, especially the theory of high efficiency media and the theory of permeation in two-dimensional or three-dimensional capillary networks Applications This paper presents a new numerical model based on the material balance of particles passing through a porous medium, both of which are described in terms of linear and radiometric models. Although the derived difference equations are expressed as fixed integrals, Parameters such as the concentration of particles in the fluid, the rate of injection, the density of the solid particles, etc., are significantly different from the applicability of the relationship between the depth of penetration and the invasion time.The results of simulation and calculation are in good agreement with those of the core clamp The experimental data of the cores are in agreement with each other, and the core length of 80mm is used in the experiment.The radiation model can be used to simulate formation damage in water injection wells, while the linear model can be used for filtration of industrial water purification and oilfield waterflooding system.