摘要
针对含腐蚀性介质的高产气井异型结构特殊螺纹接头油管在采气条件下的气液两相流冲刷腐蚀问题开展CFD数值模拟研究,采用欧拉多相流模型对油管螺纹连接处气液两相流场进行仿真分析,结合液相和腐蚀性介质CO2的相体积分数分布,根据电化学腐蚀模型计算腐蚀速率,并与文献中现场数据进行对比验证。研究结果表明,仅考虑相分布特性计算的腐蚀速率偏于保守,而在综合分析相分布特性与流动特性的基础上预测得出的冲刷腐蚀位置,获得了现场数据的验证。
In order to solve the problem of gas-liquid two-phase flow-induced-corrosion under the conditions of high productivity gas wells with corrosive medium,CFD numerical simulation was carried out.The Eulerian multiphase flow model was used to simulate the tubing thread connection of two-phase flow.The corrosion rate was calculated according to the electrochemical corrosion rate calculation model as well as considering liquid and corrosive medium of CO2 phase volume fraction distribution,and compared with the results of field data in the literature.The results show that the corrosion rate which only considers the phase distribution calculation is conservative.However,the results obtained from comprehensive analysis of phase distribution and flow characteristics,erosion corrosion on the basis of the predicted position were verified by the field data.
作者
刘文红
王华
陈志学
林凯
LIU Wenhong;WANG Hua;CHEN Zhixue;LIN Kai(State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials,CNPC Tubular Goods Research Institute,Xi′an,Shaanxi 710077,China;PetroChina Tarim OilField Company,Korla,Xinjiang 841000,China;CNPC Engineering Technology R&D Company Limited,Beijing 102206,China)
出处
《石油管材与仪器》
2019年第3期28-32,共5页
Petroleum Tubular Goods & Instruments
基金
国家科技重大专项“大型油气田及煤层气开发”之项目20“深井超深井钻井关键技术与装备”之课题3“深井超深井井筒安全钻井技术与装备”(项目编号:2016ZX05020-003)
中国石油天然气集团公司科学技术开发项目:石油管材及装备材料服役行为与结构安全国家重点实验室实验新技术开发(项目编号:2017D-5006-12)资助
关键词
特殊螺纹接头油管
异型螺纹连接
冲刷腐蚀
气液两相流
计算流体动力学
仿真模拟
premium connection tubing
Special shaped structure joint
erosion corrosion
gas-liquid two phases flow
Computational Fluid Dynamics(CFD)
simulation
