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采用油田天然油砂制成的人造岩心 ,在室内做模拟水驱实验 ,分析了注水量对储层渗透率及孔隙度和含水率对地层原油性质的影响 .结果表明 :随着油藏注水量的增加 ,部分颗粒沿孔道运移 ,其中一部分微小颗粒被水冲出 ,孔隙度增大 ,而大多数颗粒滞留在孔隙中 ,形成阻塞 ,储层中岩石的渗透率降低 ,亲水性增强 ;油田注水后 ,随着含水率的上升 ,地层油中轻烃组分及其它气体在水中溶解 ,地层油发生了氧化及生物化学反应 ,致使地层油的饱和压力、溶解气油体积比、体积系数、压缩系数均降低 ,而粘度、密度值增大 .
Using artificial cores made of natural oil sands in the oil field, a simulated water flooding experiment was conducted in the laboratory to analyze the effect of water injection on the reservoir permeability and porosity and water content on the properties of crude oil in the formation. The results show that with the increase of reservoir water injection Some of the particles migrated along the channels. Part of the tiny particles were flushed out by water and the porosity increased. Most of the particles remained in the pores to form a blockage. The permeability of the rock in the reservoir decreased and the hydrophilicity increased. After oilfield injection, with the increase of water cut, light hydrocarbon components and other gases in formation oil dissolve in water and oxidation and biochemical reactions occur in formation oil, resulting in formation oil saturation pressure, dissolved gas oil volume ratio, volumetric coefficient , The compression coefficient are reduced, while the viscosity, density value increases.