The Structure Design And Simulation Of Small Three-phase Separator

Jiangsu oilfield belongs to the small block-faulted oilfield with its well sites distributed in remote and dispersed places.The produced fluid mostly is transported to the oilfield combination station by tankers.With the secondary recovery application,water content of the produced fluid is increasing over time.This not only increases the transportation costs,it also adds the equipment load in the oilfield combination station.This paper designs a small three-phase separator fit for Tian83 station in Jiangsu oilfield in consideration of the features including low processing capacity,high water content,and low gas liquid ratio.The inlet of the separator adopts simple component which can convert kinetic energy of the produced fluid into centrifugal rotational energy so that the gas and the liquid are separated.The separation of oil and water in the separator leaves out the gas and the separator is designed based on the separation principle of gravity settler.This paper mainly studies the impacts of the process design of liquid distributor in the separator on the internal flow field of the oil and water separation component.By comparing the concentration field and the velocity field of the separator using the simulation method,the optimal design of liquid distributor has been achieved.According to the simulation of installation height,numbers,diameter,hole diameter,hole numbers of liquid distributor,the paper defines the optimal liquid distributor with the best efficiency of oil-water separation and the most reasonable flow field.Based on this,other components in the separator are arranged reasonably and finally the design scheme is obtained.Through field experiment,the technological process of Tian83 station has been improved and also the separator works well.It proves that the small three-phase separator has a good value of popularization.