喷射式套管气回收装置设计与试验研究

Design and Test Research of an Injecting Case-gas Recovery based on Fluent

油井套管气是指在原油生产中,随着流体流动压力的降低,原油中的溶解气分离,进入到油套环形空间所形成的分离气。对套管气的解决方案通常是将套管气直接燃烧掉或者排放到大气中,这种处理方式既浪费能源,又污染环境,而且还存在安全隐患。利用喷射引流原理设计了一种套管气回收装置,通过Fluent模拟,确定了装置喷嘴出口与混合室喉部入口之间距离、混合室喉部直径、混合室喉部长度、喷嘴收缩段角度、喷嘴水平段长度、喷嘴直径等6个关键部位的最佳尺寸。模拟结果与试验数据吻合较好,在特定条件下能够实现油井套管气的回收。此外,对多级增压进行了模拟研究,并提出了今后的研究方向。

With the loss of the fluid flowing pressure,dissolved gas separate from crude oil goes to the annular space and form the case-gas.However as a result of the limitation of current technology,the traditional solution of case-gas is directly burning or emission into the atmosphere.These ways waste energy,pollute the environment and pose a safety hazard.Therefore,research on injecting case-gas technology is necessary.In this paper,an injecting case-gas recovery is designed,using the jet flow principle.Best dimension of the six key parts of the recovery was determined by the Fluent software.The simulation results and the experimental data are in good agreement,so the recovery can recycle the case-gas in certain conditions.In addition,multilevel pressurization is simulated,and we put forward the future research direction.