含杂质超临界CO_(2)输送管道水膜生成模拟及腐蚀威胁预测  

Water Film Generation Simulation and Corrosion Threat Prediction in Supercritical CO_(2) Transportation Pipeline Containing Impurities

作　　者：陈兵[1] 张萧玉 房启超 唐春丽 齐文娇 王香增[3] CHEN Bing;ZHANG Xiaoyu;FANG Qichao;TANG Chunli;QI Wenjiao;WANG Xiangzeng(Xi'an Shiyou University,Xi'an 710065,China;China University of Petroleum,Beijing 102249,China;Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi'an 710000,China)

机构地区：[1]西安石油大学,西安710065 [2]中国石油大学(北京),北京102249 [3]陕西延长石油(集团)有限责任公司,西安710000

出　　处：《腐蚀与防护》2025年第3期68-76,共9页Corrosion & Protection

基　　金：国家重大工程子项(ycsy2015ky-B-02);西安石油大学研究生创新与实践能力培养计划资助(YCS22213126);陕西省科技重点研发计划项目(2022SF-233)。

摘　　要：以延长油田一期管网工程中榆林能化-乔家洼干线CO_(2)输送管道为例,结合热力学分析了该实际管网工程中杂质水凝析过程及其腐蚀威胁,使用OLGA软件模拟了管线的水膜生成并预测了腐蚀威胁,分析了稳态工况和不同瞬态工况下水膜含量及存在位置变化,并基于试验数据验证了模拟方法的适用性。结果表明:在稳态运行过程中,该管线前22.3 km存在一定量的连续水膜,管内存在腐蚀威胁;随管线输量波动,水膜体积增加,低输量下存在水膜的管段更长;低压运行时水膜体积减少,但在压力恢复过程中,水膜体积迅速增加,被水膜覆盖的管线长度达到37 km;在停输/再启动工况下,水膜体积和存在水膜的管段长度均减小,但停输可能导致前8 km管线中的静态水膜发生聚集,造成管壁严重腐蚀;在泄漏工况下,管内水膜体积增加,存在水膜的管段长度增加至30 km,管内腐蚀威胁较大。Taking the Yulin nenghua-Jiaojiawa trunk CO_(2) transportation pipeline in the first-stage pipeline network project of Yanchang oilfield as an example,the impurity water condensation process and its corrosion threat in the actual pipeline network engineering were analyzed in combination with thermodynamics.The OLGA software was used to simulate the water film formation and predicte corrosion threat of the pipeline.The water film content and its position changes under steady-state conditions and different transient conditions were analyzed,and the applicability of the simulation method was verified based on the experimental data.The results show that during steady-state operation,there was a certain volume of continuous water film in the front 22.3 km of the pipeline,and there was a corrosion threat in the pipe.With the fluctuation of pipeline throughput,the volume of water film increased,and the pipe section with water film under low throughput was longer.During the low pressure operation,the volume of water film decreased,but during the pressure recovery process,the volume of water film increased rapidly,and the length of pipeline covered by water film reached 37 km.Under the condition of shutdown/restart,the volume of water film and the length of the pipe section with water film decreased,but the shutdown may lead to the accumulation of static water film in the first 8 km pipeline,resulting in serious corrosion of the pipe wall.Under the leakage condition,the volume of water film in the pipe increased,the length of the pipe section with water film increased to 30 km,and the corrosion threat in the pipe was greater.

关 键 词：超临界CO_(2) 腐蚀 水膜 存在位置 

分 类 号：TG174[金属学及工艺—金属表面处理]