论文部分内容阅读
采用“半渗隔板法”和“自吸法”分别测振动前后岩样的毛管压力曲线及润湿性，用对比的方法研究振动对地层中界面现象的影响，对振动法增产的机理进行进一步的探讨．通过对毛管压力曲线及润湿性变化的分析得出在岩样固有频率附近振动对岩心的毛管压力曲线和润湿性影响最大，此时，毛管压力曲线的阀压值降低，饱和度中值压力降低，束缚水饱和度减小，而润湿性则表现为水湿性加强，岩心的绝对渗透率变大，有利于原油的增产和采收率的提高
The capillary pressure curves and wettability of the rock samples before and after vibration were measured respectively by using “semi-permeable diaphragm method” and “self-suction method”. The influence of vibration on the interface phenomenon in the formation was studied by contrast method. Further discussion. Through the analysis of capillary pressure curve and variation of wettability, it is found that the vibration near the natural frequency of the sample has the greatest effect on the capillary pressure curve and wettability of the core. At this moment, the capillary pressure curve has a lower valve pressure value and the saturation median value The pressure is reduced, the irreducible water saturation decreases, while the wettability is enhanced by water wettability, and the absolute permeability of the core becomes larger, which is beneficial to the increase of crude oil yield and recovery of oil.