柔性上升管中严重段塞流的特性  

CHARACTERISTICS OF SEVERE SLUGGING IN FLEXIBLE RISERS

作　　者：罗小明[1] 何利民[1] 马华伟[1] 

机构地区：[1]中国石油大学储运与建筑工程学院,山东青岛266555

出　　处：《工程热物理学报》2010年第10期1705-1708,共4页Journal of Engineering Thermophysics

基　　金：国家高技术研究发展计划(No.2006AA09Z302)

摘　　要：随着海洋油气开采不断向更深的水域发展,深水油气开采通常采用浮式生产系统。柔性上升管的长度和巨大的静水压头将引起严重段塞流,并会造成多种危害。本文对柔性上升管中严重段塞流的流动特性进行了深入的研究。结果表明:柔性上升管中严重段塞流的周期可划分为与竖直上升管类似的4个阶段:液塞形成、液塞流出、液气喷发和液体回流,柔性上升管中严重段塞流的发生范围比竖直上升管系统稍有缩小,柔性上升管系统的布置方式具有限制严重段塞流产生的作用。严重段塞流压力波动幅度的最大值出现在严重段塞流流型区域Ⅰ和过渡区域Ⅱ的转变边界上。During the exploitation of offshore oil, it is easy to form severe slugging in the riser system at low gas-liquid velocity. The severe slugging, which is characterized by intense pressure fluctuation and considerable changes of gas-liquid phase flow rate, can cause great harm. The present paper investigates in depth into the flow characteristics of severe slugging in flexible riser system. It is shown that： the periodicity of severe slugging in riser system can be divided into four stages： slug formation, slug production, blowout and liquid fallback, which resemble that in the vertical riser system. The region where severe slugging forms in flexible riser system are slightly smaller compared with that in vertical riser system. The layout of flexible riser system tends to restrict the formation of severe slugging. The maximal value of pressure fluctuation appears at the transformation boundary of flow regime region I and transition region II of severe slugging.

关 键 词：严重段塞流 柔性上升管 流型 压力波动 周期性 

分 类 号：O359[理学—流体力学]