Abstract: The laboratory research work of applying physical field to increase crude oil production is introduced in three aspects:to relieve the formation contamination,to increase the permeability of porous media and to take an aid in water driving oil.Ultrasonic or liquid puncture actions can significantly increase the permeabilities of cores and relieve the formation contamination.The liquid puncture action is effective when the environment pressure reaches 6MPa,which proves that the way is still practical at higher pressure.Applying ultrasonic field and electrostatic field can also increase oil recovery in water flooding process.Comparison of the physical fields show that the effect of liquid puncture acoustic pulse is better than the ultrasonic effect and complex fields are better than single one.The results of the experiments on how to choose the number of the acoustic pulse action,the distance between core surface and acoustic pulse source and the discharge voltage are presented,and suggestions on how to make full use of acoustic energy are given.

Key words: ultrasonic, pulse, electrostatic, porous media, permeability, recovery, physical field

摘要： 总结了利用物理场在解堵、促渗、助驱等方面的室内研究结果,超声波和液电效应声脉冲都可以显着地提高岩石的渗透率、清除污染,恢复率可达83.9%.液电效应声脉冲在实验条件所达到的0～6MPa的环境压力下解堵效果明显,并可清除气泡阻塞.在水驱油的过程中施加超声场和静电场,分别使采收率提高9.55%和8.73%.从作用情况的对比看,液电效应声脉冲优于超声波,复合场的效果优于单一场.对液电效应声脉冲的作用次数、作用距离和放电电压等参数的选择,给出了实验结果,并对声波能量的有效利用问题进行了讨论.

关键词: 超声波, 脉冲, 静电, 多孔介质, 渗透率, 采收率, 物理场