稠油机采井泵深与掺稀混配点分离设计及应用

Separate Design between Pump Setting Depth and Mixing Point for Diluent Oil Blending in Heavy Oil Mechanical Producers and Its Application

塔河油田碳酸盐岩油藏受油稠、原油黏温拐点深、泵挂深度大、掺稀混配效果差等因素影响,抽稠泵及稠油电泵在机械举升过程中普遍存在故障率高、检泵周期短、稀油损失严重、成本压力大的问题。采用有杆泵及电泵泵挂深度与掺稀混配点分离设计方法,运用电泵尾管悬挂分离及抽稠泵泵下加深分离技术,解决了上述问题。现场试验及推广应用效果表明,2种方法均达到了预期目的,目前已在塔河油田稠油井中大规模推广应用。

The carbonate oil reservoirs in Tahe oilfield feature heavy oil,deep break point of crude viscosity vs temperature,deep pump setting and poor result of diluent oil blending /mixing,which leads to a few of problem in the heavy oil pumping units and ESPs during artificial lifting,including high incident rate,short cycle of pump maintenance,severe diluent oil loss and high cost.The above problems are solved by means of the design of separation between setting depth of sucker pump or ESP vs diluent oil blending /mixing point as well as ESP liner hanging separation and deepened separation below heavy oil pump. Field test and extensive application show that both two methods can deliver the expected objective. Currently,they are applied on a large scale in the heavy oil wells of Tahe oilfield.