摘要
当前超深井钻柱安全性评价仍采用静力学方法,无法合理描述钻柱的动态安全性。通过建立超深井钻柱的动力学模型,并利用节点迭代方法和Newmark方法对其进行离散和求解,随后在分析钻柱动力学特性的基础上,利用动态应力求得钻柱的动态安全系数。通过不同钻压、转速条件下计算钻柱的动态安全系数,较好地确定了钻柱的合理工作参数范围。以塔标1井身结构三开井眼为例,得到了塔里木盆地超深井311.2 mm井眼所用钻柱的合理工作参数。
Static methods presently used for safety assessment of drill string in ultra-deep oil wells can not properly describe the dynamic safety of drill string. In this study, a dynamic model of drill string in ultra-deep oil wells is established and then discretized and solved by using a combination of node iterative method and Newmark＇s method. The dynamic safety coefficient of drill string is derived from the dynamic stress based on the analysis of dynamic characteristics of drill string. A rational range of drilling parameters of drill string is determined through the calculation of dynamic safety coefficient under different conditions regarding weight on bit and rotary speed. Further, the drilling parameters of drill string are optimized for 311.2 mm diameter boreholes of ultra-deep wells in Tarim Basin by taking an example of the third spud section of Tabiao-1 casing program.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2014年第2期359-364,共6页
Acta Petrolei Sinica
基金
国家自然科学基金项目(No.51174130)
上海市重点学科建设项目(S30106)
上海领军人才基金和上海市优秀学术带头人项目(12XD1402500)
上海市部分地方院校能力建设项目(12160500200)
中国石油天然气股份有限公司重大专项(2010E-2109)资助
关键词
超深井
钻柱
动态安全性
参数优化
动态特性
ultra-deep oil well
drill string
dynamic safety
parameter optimization
dynamic characteristics
