水力喷射泵用于稠油热采的几个问题

Problems with hydraulic jet pumpe for thermal recovery of viscous oil

用水力喷射泵开采含砂稠油，由于泵结构简单、且无运动件，解决了泵的砂卡问题。在设计喷射泵时，考虑了两个问题：一是原油粘度随油层温度的下降而增加，泵效又随原油粘度的增加而降低，为此对注蒸汽后油层温度的变化作了定性分析后，给出了可供拟合油层温度随时间变化关系曲线的温度－时间关系式。二是为方便注蒸汽，设计了一种特殊结构的底阀，可不起出底阀直接由抽转注。

In designing a hydraulic jet pump, two problems are considered: 1. the crude oil viscosity increases with the drop of the temperature of the oil-producing formation, and the pump efficiency reduces with the increase of the crude oil viscosity,therefore the variation of the temperature of the oil-producing formation after steam injection is analyzed, and a relative temperature-time curve is presented ; 2. for the convenience of steam injection, a foot valve with special structure is designed.