SRB Corrosion Component of SEW N80 Oil Casing in Oilfield Produced Fluid
摘 要
以长庆油田庆二联采出液为试验溶液, 从中分离培养出硫酸盐还原菌(SRB), 研究了SEW N80油套管的SRB腐蚀分量。结果表明, 长庆油田某井采出液中SRB为103 个/mL, 生长周期为6~7 d, 生长峰值在第3天, 身长大约2.5 μm, 呈棒状、无端生鞭毛。SEW N80管在该采出液中由SRB引起的腐蚀速率占总的腐蚀速率百分比为4.99%, 对总腐蚀速率有一定的贡献, 但贡献值不大。母材与焊缝耐蚀性能相当, 试样表面呈现局部腐蚀, 腐蚀产物以铁的氧化物为主。
Abstract
The sulfate reducting bacteria(SRB) corrosion component of SEW N80 oil casing in Qingerlian produced water of Changqing oilfield was studied by culturing SRB bacteria. The results showed that the number of SRB in Qingerlian produced water of Changqing oilfield was 103 pieces /mL, the growth cycle was 6~7 d, the growth peak was on the third day, the length was about 2.5 μm and the SRB belonged to corynebacterium without flagellum in the end. The corrosion rate of SEW N80 oil casing in the produced water caused by SRB accounted for 4.99% of total corrosion rate. To a certain extent, the SRB corrosion component contributed to total corrosion rate, but the contribution value was small. In addition, the corrosion resistance of base metal was equivalent to that of weld seam, and the surface of the tested specimens showed pitting corrosion and the main corrosion products were iron oxides.
中图分类号 TG174.2+1
所属栏目 试验研究
基金项目 国家科技支撑项目(2011BAE25B03)
收稿日期 2013/3/20
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备注毕宗岳(1962-),高级工程师,博士,从事油田防腐蚀研究,
引用该论文: BI Zong-yue,ZHAO Jun,ZHAO Jing. SRB Corrosion Component of SEW N80 Oil Casing in Oilfield Produced Fluid[J]. Corrosion & Protection, 2014, 35(1): 10
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参考文献
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【2】陈野, 刘贵昌. 硫酸盐还原菌腐蚀的防治方法及其研究进展[J]. 腐蚀与防护, 2004, 25(3): 102-104.
【3】朱绒霞, 那静彦. 综述硫酸盐还原菌腐蚀的防护措施[J]. 石油化工腐蚀与防护, 1999, 16(3): 50-51.
【4】李迎霞, 弓爱君. 硫酸盐还原菌微生物腐蚀研究进展[J]. 全面腐蚀控制, 2005, 19(1): 30-33.
【5】刘宏芳, 许立铭, 郑家焱. 硫酸盐还原菌生物膜下钢铁腐蚀研究概况[J]. 油田化学, 2000, 17(1): 93-96.
【6】舒欣欣, 李金波, 郑茂盛, 等. N80油套管钢在长庆油田采出液/砂粒两相介质中的腐蚀磨损[J]. 焊管, 2005,28(4):16-22.
【7】谯康全,吴永强,刘新露. 溶菌酶在硫酸介质中对Q235钢缓蚀行为的研究[J]. 腐蚀与防护, 2012,33(6): 478-481.
【8】ZHANG X Y,WANG F P,DU Y L. Bacteria corrosion and protection in oil and gas industry[J]. Oil& Gas Chemical Industry,1999,28(1):53-56.
【9】张志远. 油田注入水中细菌的类型及危害[J]. 四川师范大学学报:自然科学版, 2003, 26(2): 46-48.
【10】刘建华, 梁馨, 李松梅. 硫酸盐还原菌对两种不锈钢的腐蚀作用[J]. 金属学报, 2005, 41(5): 545-550.
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