SEW N80油套管在油田采出液中的SRB腐蚀分量  

SRB Corrosion Component of SEW N80 Oil Casing in Oilfield Produced Fluid

作　　者：毕宗岳 赵俊 赵晶 

机构地区：[1]宝鸡石油钢管公司钢管研究院国家石油天然所管材工程技术研究中心,宝鸡721008 [2]中国石油装备制造分公司,北京100027

出　　处：《腐蚀与防护》2014年第1期10-13,17,共5页Corrosion & Protection

基　　金：国家科技支撑项目(2011BAE25B03)

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SEWN80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6～7d，生长峰值在第3天，身长大约2．5μm，呈棒状、无端生鞭毛。SEWN80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％，对总腐弛速率有一定的贡献，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。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. ＂Fo 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.

关 键 词：SEW N80油套管 SRB腐蚀 腐蚀分量 

分 类 号：TG174.21[金属学及工艺—金属表面处理]