深斜井反洗井管柱力学分析  

Mechanical Analysis on Tubular for Inverse Well Flushing in Deep Deviated Well

作　　者：张宏伟[1,2] 龙江[1] 杨继军[2] 杨天成[2] 郑锦祥 陈瑞[1] 喻久港[1] 

机构地区：[1]西南石油大学 [2]大港油田石油工程研究院

出　　处：《石油机械》2014年第10期40-45,51,共7页China Petroleum Machinery

基　　金：中石油天然气公司课题"深斜井分层注水工艺工作行为仿真及可靠性分析技术服务"(DGYT-2013-JS-62)

摘　　要：针对注水开采工艺带来的管柱断裂、脱落、封隔器失效以及地层吸水能力下降等问题,对深斜井分层注水洗井工况进行了管柱力学研究,分析推导了管柱受力和变形计算公式。研究结果表明,管柱轴向力最大值在井口位置,并且随井深增加呈线性减小,封隔器位置轴向力存在突变。管柱轴向变形最大值在井底取得,并且随着井深增加而逐渐增大。由于井斜角的原因管柱轴向变形随井深的变化率在直井段最大,且为常数,其次是造斜段,稳斜段变化率最小。所得结果可为现场施工提供参考。To address the issues caused by water injection like tubing string fracture and fall off, packer fail- ure and decreased formation water absorbing capacity, tubing mechanics study has been conducted on the well flushing of deep deviated separate layer water injection well. Computational formula of tubular forces and deforma- tion are derived. The results show that the maximum axial force of tubing is at the wellhead, and is linearly de- creased with the increase of well depth. The axial force at the packer varies intensely. The maximum axial deforma- tion of tubing is at the bottomhole, and gradually increases with the increase of well depth. Due to the inclination angle, the maximum axial deformation rate is at the vertical section and is a constant. A smaller axial deformation rate is located at the build-up section and the minimum value is at the hold angle section. The results could provide references for the field operation.

关 键 词：深斜井 反洗井 力学分析 管柱受力 管柱变形 

分 类 号：TE935[石油与天然气工程—石油机械设备]