摘要
在粒子回收系统中,选用合适的钻井液流速来携带粒子返回地面是一个重要问题。应用Fluent软件,采用欧拉多相流模型对液体携带固体颗粒在井筒底部的环空中返流进行了数值模拟,并通过试验对模拟结果的正确性进行了验证。模拟结果表明,模拟曲线反映了临界上返速度随环空间隙的变化趋势,环空中粒子能被清水携带上返的临界流速随着环空间隙的增大而逐渐减小;对比试验结果和模拟结果可知,试验值接近模拟曲线,但不在曲线上,存在误差,但试验值与模拟值的变化趋势比较接近。该项研究结果对以后的工程设计具有一定的指导作用。
It is an important problem to select suitable drilling fluid flowrate to carry particles to flow back to the ground in the particle recycling system. The Fluent software and Eulerian muhiphase model were applied to conduct a numerical simulation of the backflow of liquid carrying solid particles in bottomhole annulus. The correctness of the simulation result was verified through experiment. The simulation shows that the simulation curve reflects the variation trend of critical up-hole velocity with annular clearance. In annulus the critical velocity of particles carried by clean water to flow back gradually decreases with the increase of annular clearance. The comparative experimen- tal findings and simulation findings show that the test value is close to the simulation curve but not on the curve, with some error. But the variation trends of the test value and simulation value fit with each other desirably.
出处
《石油机械》
北大核心
2013年第11期44-48,共5页
China Petroleum Machinery
关键词
粒子
临界流速
液流携带
环空间隙
多相流模型
钻井液流速
数值模拟
particle
critical velocity
liquid flow carrying
annular clearance
muhiphase model
drillingfluid flowrate
numerical simulation
