濮城油田主要产层已进入高含水及特高含水阶段。储集层在注入水的长期冲洗下 ,孔隙度大、渗透率高的地层 ,注水后孔隙度、渗透率都将增大 ;而岩性致密的储层 ,注水后孔隙度、渗透率基本保持不变或略有下降。随着水洗程度的增加 ,砂岩颗粒表面的粘土被水冲掉或冲散 ,颗粒表面光滑 ,岩石表面润湿性由亲油向亲水方向转化。长期受注入水的冲刷 ,相渗透率曲线表现出两相流跨度较小 ,水相渗透率急剧上升的特点。储集层在注水开发过程中 ,水沿着高渗透带推进是很明显的规律 ,高渗透油层都已被水淹 The main production layer of Pucheng Oilfield has entered the stage of high water cut and extra high water cut. Under long-term flushing of injected water, reservoirs with high porosity and permeability will increase in porosity and permeability after water injection; while in lithologically tight reservoirs, the porosity and permeability after water injection basically remain Unchanged or slightly decreased. With the increase of the degree of washing, the clay on the surface of the sandstone particles is washed away or dispersed by the water, the surface of the particles is smooth, and the wettability of the rock surface is transformed from lipophilic to hydrophilic. Long-term by the influx of water erosion, the phase permeability curve showed two-phase flow span is small, the sharp increase in water phase permeability characteristics. During the development of waterflooding reservoirs, it is obvious that water is advanced along the high permeable zone. The high permeability oil layers have been flooded