钻柱系统工作行为三维数值模拟方法  

The three-dimensional numerical method to simulate the operating behavior of the drill string system

作　　者：况雨春[1] 蒋海军[2] 雷宇航[1] 严金林[1] 吴永兴[1] 

机构地区：[1]西南石油大学机电工程学院 [2]中国石油化工股份有限公司石油工程技术研究院

出　　处：《石油机械》2011年第11期7-9,87,共3页China Petroleum Machinery

基　　金：国家自然科学基金项目"亚弹速钢粒子冲击破岩机理研究"(50874095);国家科技重大专项"低渗气藏特殊复杂地层高效钻井关键技术"(2008ZX05022-005-006HZ)

摘　　要：介绍了常用的数值解法及接触算法的运算过程,详细地分析了各解法的优缺点。对目前在应力迭代算法中显式和隐式2种算法的适用范围进行了分析,指出在钻柱系统动力学研究中应该采用隐式算法。重点对阻尼模型和钻头岩石互作用模型进行了研究,借鉴海洋波浪力学中的成熟理论解决了钻柱在钻进过程中受到的钻井液阻尼问题,并建立了简化的钻头-岩石互作用模型。实例数值模拟计算表明,采用的方法可以对复杂井眼轨迹的1 000 m钻柱进行动态工作行为分析。研究结果对石油工程中采用数值方法分析超细长杆管柱在复杂井身结构及拟实工况下的工作行为具有一定的指导意义。The operation process of ordinary numerical solutions and contact algorithms was introduced in the paper. The strengths and weaknesses of the solutions were analyzed in detail. The scope of application of explicit and implicit algorithms in the current stress iterative algorithm was analyzed. It was pointed out that the implicit algorithm should be applied in the dynamic study of the drill string system. The paper mainly focuses on the research on the damping model and the bit-rock interaction model. The mature theory in marine wave mechanics was adopted to solve the drilling fluid damping problem in the drilling process of the drill string. The simplified bit-rock interaction model was established. The numerical simulation calculation of the examples shows that the method adopted can make an analysis of the dynamic operating behavior of the 1,000 m drill string with a complex borehole track. The findings can serve as a guide to adopting the numerical method in petroleum engineering to analyze the operating behavior of the ultrafine long-rod string in complex well structure and virtual operating condition.

关 键 词：钻柱动力学 数值模拟 迭代算法 接触算法 阻尼模型 

分 类 号：TE319[石油与天然气工程—油气田开发工程]