石油钻采工艺2011，Vol.33Issue(6)：5-9,5.
泡沫在连续管螺旋管段内流动的压降数值模拟
Numerical simulation on pressure drawdown of foam flowing in coiled tubing spiral section
摘要
Abstract
Through user defined function and numerical simulation method, the pressure drop of foam flowing in coiled tubing was studied. The simulated results were compared with that gained by empirical correlation. For foam flowing in straight tubing section, the simulated pressure drop was higher than the calculated because of the effect of acceleration pressure drop and the consideration of velocity profile variation. For foam flowing in spiral section, the physical properties of the compressed foam varied with the variation of pressure, so the velocity profile and density profile would be different at the same section under different exit pressure. The velocity profiles were asymmetry due to centrifugal force. The exit pressure, gas injection rate and curvature obviously influenced the pressure drop. For designing the hydraulic parameters of foam drilling with coiled tubing, with the permission of experiments, the injection pressure should be enhanced as largely as possible to decrease pressure drop of foam flowing in the spiral section.关键词
泡沫流体/连续管/注气流量/出口压力/曲率/数值模拟Key words
foam fluid/coiled tubing/gas injection rate/exit pressure/curvature/numerical simulation分类
能源科技引用本文复制引用
张小宁,姜凤光,李根生,张明坤..泡沫在连续管螺旋管段内流动的压降数值模拟[J].石油钻采工艺,2011,33(6):5-9,5.基金项目
国家重点基础研究发展规划(973)项目"深井复杂地层安全高效钻井基础研究"(编号:2010CB226704)的部分内容. （973）
