大管径不同井斜油水两相流流型数值模拟

发布时间：2017-12-30 23:14

本文关键词：大管径不同井斜油水两相流流型数值模拟　出处：《测井技术》2016年04期 　论文类型：期刊论文

【摘要】：通过ICEM CFD建立倾角θ为±20°、±15°、±10°、±5°和0°(完全水平),内径为0.124m,长度为20m的井筒,利用FLUENT中的VOF多相流模型对大管径不同斜度井中的油水两相流进行数值模拟,得出不同油水混合速度、不同含水率和不同倾角时的流动变化规律;结合Trallero J L的流型分类方法,根据模拟得到的油水两相分布图划分了6种流型,并制作了以混合速度、倾角为坐标的流型图。倾角θ=0°(井筒水平)时,流型以分层流为主,随着混合速度的增加,其逐渐变为界面混杂的分层流;若含水率逐渐增大,流型将转变为油-油包水、油包水或水包油-水、水包油;倾角θ0°(井筒上倾)时,流型随流速的增大提前发生转变,并且水相出现回流,局部持水率变大;倾角θ0°(井筒下倾)时,水相在底部加速流动,局部持水率变小。计算结果与相关实验结果比较吻合。
[Abstract]:Through ICEM CFD, a shaft with inclination angle 胃 of 卤20 掳, 卤15 掳, 卤10 掳, 卤5 掳and 0 掳(completely horizontal, with internal diameter of 0.124 m and length of 20 m) was established. The VOF multiphase flow model in FLUENT is used to simulate oil-water two-phase flow in large diameter wells with different inclination, and different oil-water mixing rates are obtained. The flow change law of different moisture content and different dip angle; Combined with the flow pattern classification method of Trallero J L, six flow patterns were divided according to the oil-water two-phase distribution map obtained by simulation, and the mixing velocity was made. When the inclination angle is 0 掳(horizontal wellbore), the flow pattern is mainly stratified flow, and with the increase of mixing velocity, it gradually becomes the stratified flow at the interface. If the water cut increases gradually, the flow pattern will be changed into oil-oil-in-water, oil-in-water or water-in-oil-water, water-in-oil; When the inclination angle 胃 0 掳(wellbore tilting up), the flow pattern changes in advance with the increase of flow velocity, and the water phase reflux, the local water holdup becomes larger; When the inclination is 胃 0 掳, the water phase accelerates at the bottom and the local water holdup becomes smaller. The calculated results are in good agreement with the experimental results.
【作者单位】：长江大学地球物理与石油资源学院;油气资源与勘探技术教育部重点实验室(长江大学);
【基金】：中国石油科技创新基金项目(2012D-5006-0211) 湖北省教育厅科学研究计划项目(D20151301) 油气资源与勘探技术教育部重点实验室(长江大学)开放基金项目(K2014-18)
【分类号】：TE832
【正文快照】： 0引言在水平井及斜井中由于重力分异,油水两相流流型和局部持水率发生了明显的变化[1],对生产测井仪器的响应特征识别、多相流解释模型建立和各射孔层产出状况的动态监测造成困难[2],需要开展不同流动状况下油水两相流的流型研究。TralleroJ L等[3]采用观察法将水平管油水两相

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