胜利油田污水回注井管线腐蚀因素研究  

Study on corrosion factor of wastewater re-injection well in Shengli oilfield

作　　者：张菅 乔文丽[2] 裴海华[2] 王现杰 ZHANG Jian;QIAO Wen-li;PEI Hai-hua;WANG Xian-jie(Marine Equipment Inspection & Testing Co.,Ltd.,Qingdao 266235,China;School of Petroleum Engineering,China University of Petroleum,Qingdao 266580,China)

机构地区：[1]海检检测有限公司,山东青岛266235 [2]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《应用化工》2021年第5期1195-1198,共4页Applied Chemical Industry

基　　金：国家自然科学基金(51574266);山东省自然科学基金(ZR2019MEE085);中央高校基本科研业务费专项资金(18CX02096A)。

摘　　要：针对胜利油田回注污水引起的管线腐蚀及结垢问题,通过对现场失效部位进行X射线衍射(XRD)及扫描电子显微镜(SEM)分析技术,探讨了管线腐蚀的可能性因素,通过室内静态挂片实验法,确定了回注污水引起管线腐蚀的主要原因。结果表明,溶解氧、二氧化碳、pH值、硫酸盐还原菌(SRB)及高矿化度离子组成是管线腐蚀的主要因素,造成腐蚀主要因素是高矿化度离子、碳酸钙结垢与溶解氧的协同作用。建议今后采取适当的加药措施及定期进行水质检测,减少结垢和细菌腐蚀的风险。Aiming at the problem of pipeline corrosion and scaling caused by the reinjection of sewage in Shengli oilfield,the possible factors of pipeline corrosion were discussed through X-ray diffraction(XRD)and scanning electron microscope(SEM)analysis techniques on the site of failure.The results show that dissolved oxygen,carbon dioxide,pH,sulfate-reducing bacteria(SRB),and high salinity ion composition are the main factors for pipeline corrosion.The main factors causing corrosion are the synergistic effect of high salinity ions,calcium carbonate scaling and dissolved oxygen.It is recommended that appropriate dosing measures and regular water quality testing be taken in the future to reduce the risk of scaling and bacterial corrosion.

关 键 词：回注污水 管线腐蚀 结垢 腐蚀因素 

分 类 号：TQ9[化学工程] TE357.46[石油与天然气工程—油气田开发工程]