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垂直井筒携砂规律研究
引用本文:李明忠,王卫阳,何岩峰,袁谋.垂直井筒携砂规律研究[J].中国石油大学学报(自然科学版),2000,24(2).
作者姓名:李明忠  王卫阳  何岩峰  袁谋
作者单位:1. 石油大学石油工程系,山东东营257062
2. 胜利石油管理局
摘    要:借助砂粒在水和煤油中的静态沉降实验 ,优选出实际油井出砂自由沉降末速的预测公式 ,并计算得到了砂粒的不规则形状校正系数 ,通过流动携砂实验获得了砂粒在流动液体中的沉降规律。由于受管道内流体速度场的影响 ,砂粒的实际沉降速度并非自由沉降末速与流体平均流速的矢量和 ,而是与平均流速和砂粒自由沉降末速之间有一个线性的统计关系式。该研究最终确定出砂粒在井筒中表现为沉降、悬浮及上升运动的临界条件 ,此临界条件可作为有效实施井筒防砂工艺的理论依据。

关 键 词:油井  砂粒  沉降速度  校正系数  临界流速  携砂实验

Experimental Study on the Performance of Sand Moving in Vertical Wellbore
Li Ming-zhong,Wang Wei-yang,He Yan-fen,Yuan Mou.Experimental Study on the Performance of Sand Moving in Vertical Wellbore[J].Journal of China University of Petroleum,2000,24(2).
Authors:Li Ming-zhong  Wang Wei-yang  He Yan-fen  Yuan Mou
Abstract:By means of experiment on sand particles settling in water and kerosene, some formulas for predicting the free ultimate settling velocity of sand produced in oil wells are selected. The corrective coefficients for settling velocity of sand particle with irregular shape are determined by calculation. The laws of irregularly shaped sand particles settled in flowing water are obtained by the experiment in vertical pipes. Under the effect of velocity distribution of liquid in the pipe, the settling velocity is not equal to the vector sum of free untimate settling velocity and average velocity of fluid. There is a statistical linearity relationship between these parameters, which is the critical condition for sand to move downward, upward or suspend in wellbore. The critical condition can be taken as the theoretical basis of effective sand control in wellbore.
Keywords:wellbore  sand particle  ultimate settling velocity  corrective coefficient  critical velocity  lifting sand experiment  
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