Abstract: When there is a foam column is the annular space of a pumping oil well there will be no distinct gas—oil interface. In that case, it is difficult to apply the acoustic well-sounding(AWS)method. Based on the principle of mass balance, this paper deals with rules of. motion of the pseudo-fluid level in the annular space in the process of testing the pumping oil well. Through working out the differential equation of motion of the pseudo-fluid level in annular space,P_wbo^KL(dL/dt)+m/k(e^KL-1)=(Q₁-Q₂TZP_at/AT_at) the depth of the pseudo-fluid level in annular space during the normal operation of the pumping oil well can be determined as following:.

摘要： 当抽油井的环形空间中出现泡沫段时,将会失去明显的油-气界面。这时,使用回声测深法将遇到困难。本文应用物质平衡原理,研究了抽油井环空拟液面在测试过程中的运动规律。通过求解环空拟液面的运动微分方程式P_wbo^KL(dL/dt)+m/k(e^KL-1)=(Q₁-Q₂TZP_at/AT_at)得出以此,可以确定抽油井正常生产时环空拟液面的深度。