井下自激振动采油技术模拟试验与应用

Experiments and Field Application of Downhole Self-excited Vibration Technique

为将振源移到井下长期作用于油层,提高振动处理的效果,研制了井下自激振动采油装置。分析了自激振动解堵增油的机理,并通过室内模拟试验,研究了振盘沉没深度、振片直径、振片间距、涡流槽等对波动频率和压力的影响,同时测试了振动波在油层中横向的传播距离,为振动采油装置的设计与工艺优化提供依据。现场试验表明,井下自激振动采油技术是一种投资少、见效快、无污染、有效期长的解堵增产、强化采油新技术。

In order to generate vibration in downhole and improve the long-time performance, selfexcited vibration device was developed. This paper introduces the mechanism of downhole vibrator by which oil production increases and the relationship between amplitude or frequency and the influence factor： such as vibration disc submergence depth, disc diameter and spacing, vortex groove and so on, at the same time, the wave absorption on horizontal direction is also studied which provides the principle of the device design. The application indicated that it is a new efficient technique with low-cost, non-pollution, long efficiency time.