三维井眼全井钻柱系统动力学模型研究  

Research on dynamics model of full hole drilling-string system with three-dimensional trajectory

作　　者：祝效华[1] 刘清友[1] 童华[1] 

机构地区：[1]西南石油大学机电工程学院,四川成都610500

出　　处：《石油学报》2008年第2期288-291,295,共5页Acta Petrolei Sinica

基　　金：中国博士后科研基金项目"基于钻井系统动力学的螺杆钻具力学特性分析及参数匹配研究"(20060391034);国家自然科学基金项目"基于钻井系统动力学的井眼轨迹预测理论及控制方法研究"(5047404U);国家重点实验室开放基金"气体钻井钻柱振动机理"(PLN0701)联合资助

摘　　要：依据Hamilton原理,利用有限元法建立了综合考虑钻柱纵向横向扭转耦合振动、钻柱与井壁的碰撞及摩擦、钻井液对钻柱的黏滞阻尼、钻柱内钻井液对运动钻柱的弯曲效应、环空钻井液对运动钻柱的压差效应、地层压差效应、屈曲对摩阻的增益、钻头与岩石相互作用等因素的三维井眼全井钻柱系统动力学模型。研究了具有不确定性和动态边界的大型非线性系统的求解方法,开发了钻柱系统动力学特性仿真软件。该软件可以计算任意钻井参数、钻具组合、钻井液参数及地层参数下任意钻柱单元的动力学特性参数(包括位移、速度、加速度、载荷等)。According to Hamilton Principle and finite element method, the dynamics model for full hole drilling-string system with three-dimensional trajectory was established by synthetically considering some factors. The factors were longitudinal vibration, transverse vibration and torsion vibration of drilling string, collision between drilling string and wall of well, friction between wall of well and drilling string, sticky damping between slurry and drilling string, bending effect of moved drilling string caused by slurry in drilling string, differential pressure effect of stratum, attached effect of resistance caused by buckling and interaction between drilling bit and rock. The resolution method for a large nonlinear system with uncertainty, dynamic and quasi-stochastic boundaries was investigated. Emulation software for emulating the dynamics characteristic parameters, including displacement, velocity, acceleration and load of drilling string element, was developed. It can be run under freewill drilling parameters, drilling tool, drilling fluid and stratum.

关 键 词：三维井眼 全井钻柱系统 动力学模型 耦合振动 钻井液 动力学仿真软件 有限元法 

分 类 号：TE821[石油与天然气工程—油气储运工程]