蒸汽喷射泵用于斜直水平井举升稠油的研究

蒸汽喷射泵是以水蒸汽代替普通喷射泵的动力液,为井下原油举升至地面提供能量,同时能提高井筒内原油温度的一种采油设备。根据热力学和流体力学的基本原理,研究了水蒸汽在喷射系内的流动规律,包括不同蒸汽干度、不同井底流压、不同喷射泵喷嘴组合下的蒸汽注入量和泵排出压力的变化规律:在地层压力一定的条件下,泵口排出压力和蒸汽的干度变化关系不大;产液量随蒸汽干度的增加而增大;井深越浅,需要的排出压力越小,举升相同的液量所需的蒸汽量越少;蒸汽喷射系用于稠油举升在技术上是可行的,可以结合井筒压力和温度的计算进行稠油井蒸汽喷射泵的举升设计。研究结果对实际生产有一定的指导意义。

STUDY OF HEAVY OIL LIFTING IN INCLINED WELL BY STEAM JET PUMP

Steam jet pump is a kind of oil producing device, which uses steam to supply energy for oil lifting and improve the temperature of oil in well bore. Based on the basic principles of thermodynamics and hydromechanics, the authors studied the regularity that the steamflows in the jet pump. The regularities include relations of excreta pressure of the pump and quantity of steam injection in different steam humidity and pressure under wed and different spray nozzles of pump. The conclusions are: when the formation pressure is certain, the pump discharge pressure changes little with the variation of steam quality; the more dry the steam, the more the liquid is produced ; the more shallower the well, the more less the discharge pressure is needed, the more less the steam needed to lift the same volume of liquid. It is technically feasible to use steam jet pump to lift viscous crude oil. Design of using steam jet pump to lift viscous crude oil can be conducted based on the well bore pressure and temperature calculation. The research results may be the guide for practical production.