非牛顿流体流态判别方法的研究  

A STUDY OF THE FLOW PATTERN DISCRIMINANT METHOD FOR NON-NEWTONIAN FLUID

作　　者：刘崇建[1] 刘孝良[1] 柳世杰[2] 

机构地区：[1]西南石油学院 [2]四川石油管理局井下作业处

出　　处：《天然气工业》2001年第4期49-52,共4页Natural Gas Industry

基　　金：中国石油天然气集团公司"九五"重点科技攻关项目"四川地区复杂地质条件深井;超深井钻井技术"(编号96 0 0 2 4)中固井技术研究的部分

摘　　要：正确判别和选择非牛顿流体泥浆、水泥浆的流动状态 ,对优选钻井水力参数 ,避免两相流体作垂直运动时的界面相互掺混作用是非常有意义的。本研究在分析现有方法存在问题的基础上 ,从判别流态的基本概念出发 ,应用流道上的平均视粘度 ,建立了幂律流体判别流态的新方法。该方法包括流体在管内或环空流动时 ,平均视粘度、雷诺数等参数的表达式及平均视粘度在截面所处的位置。将该方法与幂律流体常用的流态判别方法、局部挠动流态判别方法对比 ,并进行试验验证 ,说明文中提出的方法含义清楚 ,符合实际 。It is very significant for optimizing drilling hydraulic parameters and avoiding the inter-blending between the interfaces of two-phase fluid moving vertically to correctly descriminate and choose the flow pattern of non-Newtonian fluid mud and slurry. On the basis of analyzing the problems in existing methods and in light of the basic conception of discriminating flow pattern, a new method of discriminating flow pattern for power-law fluid was set up by use of the average apparent viscosity along flow path. This method includes the expressions of the parameters as average apparent viscosity and Reynolds number, etc., and the position of the average apparent viscosity at the section, when the fluid moves in pipeline and annular space. In comparison with the flow pattern discriminant method commonly used for power-law fluid and with local disturbance flow pattern discriminant method, the new method verified by testing is of the properties as clear meaning, conforming to reality and a wider application sco pe.

关 键 词：钻井 非牛顿流体 流体流动 流态判别 水力参数 

分 类 号：O373[理学—流体力学]