摘要
针对水平井多封隔器管柱在井下多种载荷的共同作用下易引起管柱失效的安全问题,基于力学研究中的多杆件的多次超静定结构,引入力法对多封隔器之间管柱进行受力分析,同时考虑温度效应、活塞效应、鼓胀效应和螺旋屈曲效应的影响,建立考虑多封隔器影响的轴向力数学模型;在此基础上建立多封隔器管柱力学安全强度评价准则和封隔器控制信封失效判断方法,对现场水平井多封隔器管柱进行力学分析和安全评价。研究结果表明,建立的考虑多封隔器影响的轴向力数学模型计算结果大于常规不考虑多封隔器影响时轴向力,若不考虑多封隔器的影响将低估多封隔器管柱的轴向力,而造成管柱受力危险;同时对管柱危险位置和封隔器进行安全评价,得到了酸化作业时油压和套压的综合控制参数,以期为水平井多封隔器管柱安全工作参数的优化设计提供理论依据。
In view of the safety problem that the string of multiple packers in horizontal wells is easily prone to string failure due to the combined action of various downhole loads,the force method was introduced to analyze the force on the multi-packer string based on the multiple statically indeterminate structure of multi-bar members in mechanical research.Considering the temperature effect,piston effect,bulge effect and spiral buckling effect,the axial force mathematical model considering the effect of multiple packers was established.Then,the evaluation criteria of mechanical safety strength of multi-packer strings and the judgment method of packer control envelope failure were established to conduct mechanical analysis and safety evaluation on multiple packer strings in horizontal wells.The results show that the calculation results of the established mathematical model of axial force considering the influence of multiple packers are greater than the axial force when the influence of multiple packers is not considered.If the influence of multiple packers is not considered,the axial force of the multiple packer string will be underestimated,and the stress risk of the string will be caused.At the same time,the dangerous position of the string and the safety of the packer are evaluated,and the comprehensive control parameters of the oil pressure and casing pressure during the acidizing operation are obtained.The research results provide a theoretical basis for the optimization design of the safe working parameters of the multiple packer string in horizontal wells.
作者
乔雨
张智
张家振
向世林
何小平
QIAO Yu;ZHANG Zhi;ZHANG Jia-zhen;XIANG Shi-lin;HE Xiao-ping(Drilling and Production Engineering Technology Research Institute,CNPC Chuanqing Drilling Engineering Co.,Ltd.,Guanghan 618300,China;National Energy R&D Center of High-sulfur Gas Reservoir,Chengdu 610213,China;State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation(Southwest Petroleum University),Chengdu 610500,China;Development Department of PetroChina Southwest Oil and Gas Field Company,Chengdu 610021,China)
出处
《科学技术与工程》
北大核心
2023年第13期5507-5514,共8页
Science Technology and Engineering
基金
国家自然科学基金(U22A20164,52074234)
四川省青年科技创新研究团队专项计划(2020JDTD0016)
中国石油-西南石油大学创新联合体科技合作项目(2020CX040100)。
关键词
多封隔器管柱
力法
轴向力
安全评价
综合控制参数
multi packer string
force method
axial force
safety evaluation
integrated control parameters
