声电复合场提高采收率的应用研究

APPLICATION RESEARCH OF IOR WITH ACOUSTIC AND ELECTRIC COM POUND FIELD

邵长金

Shao Changjin

石油大学·北京

低频声波或次声波传播距离远,可对储油层进行大范围作用,但对人体和环境有影响。应用电场既可进行大范围油层处理又避免了负作用。在实验室条件下研究了声、电场对采收率的影响,结果表明:单独施加声场或电场提高采收率幅度为2%~10%;施加电场可降低采出液的水油比,降低幅度随电势梯度的增加而增大;声、电复合场比单一场能更好地提高采收率。对直流电场和不同频率的交流电场、不同极性的直流电场的作用效果进行了对比。讨论了电动阻流效应和外加电场对多孔介质渗流的影响。

The acoustic wave with low frequency or the infra-acoustic wave can go far away, can exert effect on reservoir in a large scale, but have adverse influence on both human and environment. On the con trary, the electric field can not only treat the reservoir in a large scale, but also can avoid the adverse effect. This paper studies the effect of acoustic and electric field on the oil recovery rate under lab conditions. presents the results as follows:oil recovery rate can be increased by 2%-10% by means of single acoustic or electric field; while more oil recovery rate can be achieved if acoustic and electric compound field is used. This paper also discuses the influence of AC electric field with different frequency and of DC electric field with different polarity, discuses the influence of electric flow choking effect and impressed electric field on the effluent seepage of the porous media.

10.3969/j.issn.1000-7393.1999.04.016