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在特低渗透油田注水开发过程中 ,注入水中的悬浮颗粒会伤害油层的渗透率 ,导致注水井的吸水能力降低和油井产能下降 ,影响开发效果。采用物理实验和油藏工程的方法 ,研究注入水中的悬浮颗粒对特低渗透油藏的注入压力、地层渗透率和产能的影响 ,得到的结论是 :岩心渗透率越低 ,注入水的注入压力与地层水的注入压力之差越大 ;在渗透率相同的情况下 ,滤膜孔径越小 ,注入水渗流阻力越低 ;处理注入水的筛网尺寸越大 ,油层渗透率伤害越大 ,特低渗透油藏的产量和极限供油半径越小。图 3参 3 (杨正明摘 )
In the process of waterflooding in ultra-low permeability oilfield, the suspended particles injected into the water can damage the permeability of the reservoir, resulting in the decrease of the water absorption capacity of the injection well and the decrease of the production capacity of the well, affecting the development effect. The effects of suspended particles injected into water on the injection pressure, formation permeability and productivity of ultra-low permeability reservoirs are studied by means of physical experiments and reservoir engineering. The conclusion is that the lower the core permeability, the injection pressure of injected water And formation water injection pressure difference is greater; the same permeability, the smaller the filter pore size, the lower the resistance of the injected water seepage flow; the larger the sieve size of the injection water treatment, the greater the permeability of the reservoir damage, especially Low permeability reservoir production and limit the smaller the radius of the oil supply. Figure 3 Reference 3 (Yang Zhengming pick)