大量实验表明：当油藏生产原油时，随着地层中流体压力的降低，油层的孔隙度和渗透率下降，特别是在异常高压油藏中尤为显著。
Many experiments show that: when a well produces oil from a reservoir, the porosity and permeability will decrease, as fluid pressure drops, especially for reservoirs with abnormal high pressure.
实验结果表明，温度下降、原油组分改变、流速变化均能促进有机垢的形成，导致油层渗透率显著下降。
The result shows that these parameters' changes are the main factors that cause the reservoir permeability to drop obviously.
实验研究了外加直流电场作用下水驱油藏多孔介质中的流体渗流速度、阻力系数、储层渗透率及原油采收率的变化特性。
The variation of seepage velocity, resistance coefficient, reservoir permeability and oil recovery in porous media of water-drive reservoir in direct current (DC) electric field are studied in detail.
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