【作者】 郭晓乐； 汪志明；

【Author】 GUO Xiao-le WANG Zhi-ming (China University of Petroleum,Beijing,102249)

【机构】 中国石油大学(北京)石油天然气工程学院；

【摘要】 根据流体力学理论建立了大位移井三层稳定岩屑运移模型,模拟研究了环空返速、岩屑直径和井斜角等对岩床高度和环空压耗的影响规律,并与他人实验数据和模型进行了对比分析．研究表明：环空返速对环空清洗效果的影响显著；高返速情况下,岩屑尺寸的影响可以忽略；不同井斜角范围的岩屑运移机理不同,钻井水力设计时应分段考虑．更多还原

【Abstract】 A Three layer model for cuttings transport in ERW is proposed based on the law of mass conservation and momentum theorem.The model described in this paper formulates transport process and the effects of parameters on it.These parameters involve annular velocity,cuttings size and hole inclination,and so on.The simulation results show that annular velocity plays a very significant role in cuttings transport;the cuttings size have an ignorable effect on well cleaning at high annular velocity;the segments with different hole inclination have different mechanism of cuttings transport and should be designed respectively in engineering.更多还原