超高温高压曲井钻柱纵-横-扭耦合振动模型及黏滑振动特性研究  

Study on Axial-lateral-torsion Coupling Vibration Model and Stick-slip Characteristics of Drilling String in Ultra-HPHT Curved Wells

作　　者：郭晓强 柳军[1,2] 王建勋 李潇 魏安超 朱海燕 GUO Xiao-qiang;LIU Jun;WANG Jian-xun;LI Xiao;WEI An-chao;ZHU Hai-yan(School of Mechanical and Electrical Engineering,Southwest Petroleum University,Chengdu 610500;School of Mechanical Engineering,Chengdu University,Chengdu 610106;Zhanjiang Branch,CNOOC(China)Co.Ltd,Zhanjiang 524057;School of Energy,Chengdu University of Technology,Chengdu 610059)

机构地区：[1]西南石油大学机电工程学院,成都610500 [2]成都大学机械工程学院,成都610106 [3]中海石油(中国)有限公司湛江分公司,湛江524057 [4]成都理工大学能源学院,成都610059

出　　处：《机械工程学报》2022年第5期119-135,共17页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51875489,52105125);中国博士后科学基金(2021TQ0273);国家建设高水平大学公派研究生项目(201908510191)资助项目。

摘　　要：针对超高温高压曲井钻柱系统振动失效问题,采用能量法结合哈密顿原理,建立了全井段钻柱系统纵-横-扭耦合非线性振动模型,考虑了井眼轨迹变化、井筒约束作用、钻头与岩石的互作用力以及井筒超高温高压对管柱弹性模量和钻井液黏度的影响。借助有限元理论实现了非线性振动模型的数值求解。采用现场实测数据,与所建立模型理论计算结果对比,验证了钻柱纵-横-扭耦合非线性模型的正确性和有效性。基于此,借助中国南海乐东超高温高压区块M定向井参数,探究了转盘转速、钻压、扭冲提速工具以及底部钻具组合(Bottom hole assembly, BHA)长度对钻柱系统黏滑振动特性的影响规律,发现:在满足其他要求(如经济成本、工具强度、磨损问题、工具通过能力等)的情况下,应尽可能提高转盘转速和BHA长度,有效提高钻井效率。现场钻压和扭冲工具的扭矩值存在一个设置最优值,与井身结构、工具尺寸等因素有关,可采用所提出的分析方法确定不同工况下的最优钻压和冲击扭矩,有效提高现场钻井效率和BHA工具的安全性。Aiming at the vibration failure of drill string system in ultra-high temperature and high pressure(ultra-HPHT) curved well,the axial-lateral-torsion nonlinear coupling vibration model of drill string system is established using finite element method, energy method and Hamiltonian principle. The influence of wellbore trajectory change, wellbore constraint, interaction between bit and rock and ultra-HPHT of wellbore on elastic modulus of drill string and viscosity of drilling fluid are considered. The finite element method(FEM) are used to realize the numerical solution of the nonlinear vibration model. The correctness and effectiveness of the axial-lateral-torsion nonlinear coupling vibration model is verified by comparing the measured data on-site with the theoretical calculation results of the model. Based on this, with the help of the parameters of M directional well in Ledong ultra-HPHT block,South China Sea, the vibration response characteristics and stick slip vibration characteristics of the drill string system are analyzed. It is found that, when other requirements were met(for example, the strength of tools, low friction torque of drilling string and well trafficability of tools), the rotary speed and bottom hole assembly(BHA) length should be increased as much as possible, which can effectively improve the drilling efficiency. An optimize parameters of weight on bit(WOB) and the torsional impact tool were exist which depended on the well structure, downhole tool size, etc. and can be determined using the proposed analysis method, so as to effectively improve the drilling efficiency and the safety of BHA tools.

关 键 词：超高温高压 钻柱系统 非线性振动 黏滑振动特性 机械钻速 

分 类 号：TE38[石油与天然气工程—油气田开发工程]