自激波动采油技术研究

抽油井正常工作时,借助波动器可在井底产生自激压力波。介绍了自激压力波产生的机理、理论计算及室内试验情况,自激压力波频率小、幅值大,可对油层产生连续波动作用。试验研究表明,自激压力波幅值主要与沉没度、果挂深度和抽油机的冲程、冲次有关。现场应用3口井表明,波动采油可改善低渗低产能升渗流状况,增加油井产量。

RESEARCH ON OIL PRODUCTION WITH SELF-EXCITED WAVE

When the pumping well runs normally, self-excited pressure wave can be generated at bottom hole by means of wave generator. This paper introduces the generating mechanism, theoretical calculation and lab test of self-excited wave. The frequency of the wave is small, the amplitude value of it is large, and it can produce successive surge action on the oil reservoir. Lab test shows that the amplitude value of the self--excited pressure wave is mainly related to the pump submergence, the pump setting depth, as well as the stroke and pumping speed of well pumping unit. Field application of it in 3 wells shows that the technology can improve the percolation condition of shallow stripper wells, and increase the output of oil wells.