多相流井筒压力分布规律探讨  

The Study on the Wellbore Pressure under Multiphase Flow Condition

作　　者：侯绪田[1] 

机构地区：[1]中国石化石油勘探开发研究院德州石油钻井研究所,山东德州253005

出　　处：《石油钻探技术》2004年第4期32-34,共3页Petroleum Drilling Techniques

摘　　要：井底负压值控制是欠平衡钻井技术的基础,而井底负压值的大小与环空多相流的有关压力计算有关。根据多相流诸多变量参数都是井深函数的特点,提出了微分井眼空间,然后在这微分段内假设计算参数不变进行井底压力计算,建立了相应的数学计算模型,并用数学的方法对计算模型的正确性进行了验证。根据该模型编制的计算机软件的现场应用表明,该方法具有很强的适用性。The under-balanced drilling technology is based on how to control the bottom negative pressure which is related to the pressure computation of multiphase flow in annulus. On the basis of most variables of multiphase flow are functions of depth, this paper brings forward the differential wellbore, and computes bottom hole pressure with fixed computation parameters in this wellbore, establishes mathematical model and verifies its correctness. Field applications of soft ware programmed by this model show that this method can be widely used.

关 键 词：欠平衡钻井 多相流动 井底压力 压力计算 迭代法 数学模型 

分 类 号：TE21[石油与天然气工程—油气井工程]