CO_(2)-SRB共存环境下页岩气地面管材冲刷腐蚀评价研究  

Research on Corrosion Assessment of Shale Gas Ground Pipelines in CO_(2)-SRB Coexistence Environment

作　　者：霍绍全[1] 王永波[2] 郑春焰 曾德智[3] 李乾 HUO Shaoquan;WANG Yongbo;ZHENG Chunyan;ZENG Dezhi;LI Qian(Research Institute of Natural Gas Technology,PetroChina Southwest Oil and Gasfield Company,Chengdu 610213,China;PetroChina Southwest Oil and Gasfield Company,Chengdu 610051,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;Sichuan Huayou Group Corporation,Chengdu 610066,China)

机构地区：[1]中国石油西南油气田公司天然气研究院,成都610213 [2]中国石油西南油气田公司,成都610051 [3]西南石油大学油气藏地质及开发工程全国重点实验室,成都610500 [4]四川华油集团有限责任公司,成都610066

出　　处：《焊管》2025年第2期8-14,共7页Welded Pipe and Tube

基　　金：中国石油天然气股份有限公司科技项目“页岩气规模增储上产与勘探开发技术研究”(项目编号2023ZZ21);中国石油西南油气田分公司科学研究与技术开发项目“页岩气田低压开采技术与腐蚀防护研究”(项目编号20230305-05)。

摘　　要：为了研究页岩气地面管线在含CO_(2)和细菌条件下腐蚀穿孔原因,利用高温高压釜研究了模拟工况下L360N、抗菌钢、L360N渗氮钢的耐冲蚀性能,采用扫描电子显微镜、能谱仪、激光共聚焦显微镜对试样表面微观形貌和腐蚀深度进行分析。结果表明,L360N、L360N渗氮钢、抗菌钢的冲蚀速率分别为0.3016 mm/a、0.2726 mm/a、0.1363 mm/a,冲蚀深度分别为30.215μm、23.788μm、13.803μm,腐蚀产物主要为FeS、FeCO_(3),流体对腐蚀产物膜的剪切加速腐蚀产物脱落。3种材料的耐冲蚀性能由强到弱依次为抗菌钢、L360N渗氮、L360N,研究结果为页岩气管道腐蚀防控领域提供数据支持和理论依据。To explore causes of corrosion perforation in shale gas surface pipelines under CO_(2)rich conditions and bacteria,a high temperature and pressure autoclave experimental setup was utilized to investigate corrosion resistance of L360N,antibacterial steel,and nitrogen⁃doped L360N under simulated conditions.Surface morphology and corrosion depth of the samples were analyzed using scanning electron microscopy,energy dispersive spectroscopy,and laser confocal microscopy.Results indicate that the erosion rates of L360N,nitrogen⁃doped L360N,and antibacterial steel are 0.3016 mm/a,0.2726 mm/a,and 0.1363 mm/a,respectively,with erosion depths of 30.215μm,23.788μm,and 13.803μm.Corrosion products are FeS and FeCO_(3).Shear of the corrosion product film by the fluid will promote the erosion of the corrosion product.The corrosion resistance performance of the three materials from strong to weak is antibacterial steel,nitrogen⁃doped L360N,L360N.The relevant research results provide data support and theoretical basis for the field of shale gas pipeline corrosion prevention and control.

关 键 词：页岩气 地面管线 细菌腐蚀 

分 类 号：TE988.2[石油与天然气工程—石油机械设备] TG174.2[金属学及工艺—金属表面处理]