石油与天然气化工2026，Vol.55Issue(2)：120-127,8.DOI:10.3969/j.issn.1007-3426.2026.02.014
考虑轴向空间变异性的页岩气集输管道内腐蚀预测模型研究
Research on corrosion prediction model of shale gas gathering pipeline based on axial spatial variability
摘要
Abstract
Objective A corrosion failure prediction model considering axial spatial variability is proposed for the internal corrosion of shale gas gathering pipelines.Method Indoor tests were carried out on A#and B#gathering pipelines in a shale gas field in Sichuan,and the main influencing factors of shale gas gathering pipeline corrosion were investigated through the identification of corrosion morphology,indoor corrosion orthogonal experiments,and the comparison of corrosion rates.According to the experimental results,a corrosion failure probability model considering the axial spatial variability of parameters was established.The model was applied to predict the corrosion behavior of A#and B#pipelines,and its accuracy was verified through field excavation of the pipelines.Result The results show that the bacteria in the produced fluid of shale gas gathering pipelines are mainly sulfate-reducing bacteria(SRB),and the main elements of its corrosion products are C,O,Fe and a small amount of S;the main factors affecting the corrosion are the flow rate,the liquid holdup,SRB number the inclination of the pipeline,the corrosion inhibitor,and a variety of anions and cations;the model predicts that the corrosion of pipeline concentrates on the area of the pipeline at 5-7 o'clock and it mainly occurs in the pipeline sections with water deposition at the low-lying places.The engineering example showed that the model accurately predicted the corrosion morphology of A#and B#pipelines in a shale gas field in Sichuan.The main corrosion pattern of 7 out of 11 pipe sections of A#pipeline is pitting corrosion,and the main corrosion pattern of 8 out of 12 pipe sections of B#pipeline is uniform corrosion,which is consistent with the excavation results.Conclusion The research results can provide a theoretical basis and practical reference for predicting the corrosion behavior inside shale gas pipelines.关键词
页岩气集输管道/内腐蚀/空间变异性/失效概率/预测模型Key words
shale gas gathering pipelines/internal corrosion/spatial variability/failure probability/prediction model引用本文复制引用
申俊,周劲,张良,程思杰,祝星语..考虑轴向空间变异性的页岩气集输管道内腐蚀预测模型研究[J].石油与天然气化工,2026,55(2):120-127,8.基金项目
中国石油西南油气田公司科研项目"深层页岩气规模上产关键技术研究与应用"(2023ZZ21YJ01) （2023ZZ21YJ01）
