深水钻探井筒温度场的计算与分析  

Calculation and analysis of wellbore temperature field in deepwater drilling

作　　者：高永海[1] 孙宝江[1] 王志远[1] 曹式敬[2] 宋林松[2] 程海清[1] 

机构地区：[1]中国石油大学石油工程学院,山东东营257061 [2]中海油田服务股份有限公司,北京100027

出　　处：《中国石油大学学报（自然科学版）》2008年第2期58-62,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家“863”计划项目(2006AA09A106);教育部博士点基金项目(20060425502)

摘　　要：通过对海水温度数据回归分析,得到了南海海水温度场随深度的分布。以传热学基本理论为基础,通过理论推导,得到了循环及停止循环条件下的深水钻探井筒温度场理论计算公式。计算结果表明,循环钻进期间,要维持隔水管内的温度,应保证隔水管的保温层完好,并在满足钻井施工条件下尽量增大循环排量;停止循环时,随着关井时间的增加,井筒内流体温度逐渐接近外界环境温度,为避免在井筒及防喷器处生成大量水合物,关井时间要尽量短。The sea water temperature distribution in depth of Nanhai was obtained by data regression analysis. And the calculation formulas of wellbore temperature field during circulation or non-circulation terms in deepwater drilling were established based on the thermodynamics theory. The calculation results indicate that the insulating layer should be undamaged and large delivery capacity should be used for maintaining the temperature under circulation condition. When the pump stops, the wellbore temperature will be closing to the extraneous temperature with shutting time increasing. Shutting time must be short to prevent hydrates forming in wellbore and blowout preventer.

关 键 词：深水钻井 井筒 温度场 

分 类 号：TE21[石油与天然气工程—油气井工程]