泥浆性能对钻井井底压力与岩屑运移的影响分析  

Influence Analysis of Mud Performance on Bottom Hole Pressure and Cuttings Transport in Drilling

作　　者：张青 

机构地区：[1]中国石油集团长城钻探工程有限公司,辽宁 盘锦

出　　处：《地球科学前沿（汉斯）》2023年第7期780-787,共8页Advances in Geosciences

摘　　要：泥浆性能对钻井效率和安全有着重要影响。基于威远页岩气钻井数据,利用大位移钻井水力学分析优化系统分析了泥浆性能对页岩气钻井井底压力与岩屑运移的影响规律,结果表明,温度和压力会改变泥浆密度和有效粘度,井筒内实际泥浆密度和有效粘度与地面值存在一定差值;随泥浆排量、密度和有效粘度增加,井底ECD增加,环空岩屑床高度减小,随机械钻速增加,钻进所需最小排量增加,其中,斜井段所需最小排量比直井段要大。Mud performance has a significant impact on drilling efficiency and safety. Based on Weiyuan shale gas drilling data, the influence of mud performance on shale gas drilling bottom hole pres-sure and cuttings transport is analyzed by using the Extended Reach Drilling Hydraulics Analysis Optimization System. The results show that temperature and pressure will change the actual mud density and effective viscosity, and there is a certain difference between the value of mud density and effective viscosity in the wellbore and the ground;as the mud flow rate, density, and effective viscosity increase, the bottom hole ECD increases, and the height of the annular cuttings bed decreases. As the drilling speed increases, the minimum flow rate required for hole cleaning increases. Furthermore, the minimum flow rate required for the inclined section is larger than that for the vertical section.

关 键 词：钻井 泥浆性能 井底压力 岩屑运移 

分 类 号：TE2[石油与天然气工程—油气井工程]