自振采油技术的理论分析与应用

自振采油技术是利用油管柱的弹性伸缩能量,在油层部位通过自振振盘产生低频振动波达到净化油流孔道,解堵增渗的振动效应,也改善了油层流体的渗流状态,降低原油的粘度,起到降水增油的物理作用。通过分析自振采油技术的作用机理、设计原理,计算自振装置产生的最大冲击力、冲洗流量、冲洗速度,证实了该技术的实施,可减少冲程损失,提高泵效,又可加强油层的脉动压力。经现场应用12口井表明,此项技术平均单井增油幅度42%,有效率91·7%,是高含水期油田的强化生产、油井增产、提高采收率的高效开发新技术。

RESEARCH AND APPLICATION OF THE SELF-EXCITED TECHNIQUE FOR PRODUCTION

With string of tubing elasticity energy,the self-excited technique for production is an automatic plate law-frequency vibration wakes in oil zone to clean oil flow porous, to remove plug, to improve its permeability and the fluid status, to de-crease crude oil viscosity. The technique will decrease the water cut and increase the crude oil production. This paper analyzed the function mechanism of the technique and its design concept theoretically, and calculated the maximum pulse force as well as the maximum flushing flow and flushing velocity from the automatic vibration unit. The application of the technique by twelve wells in sites indicated that the average production increased42% per single well and its efficiency reached 91.7%. It is an efficient new technique for the enhanced production well stimulation and enhanced oil recovery in fields during the high water-bearing interval.