Corrosion Mechanism of Oil Casing in Water Injection Well in Bohai Oilfield
摘 要
渤海油田注水井下环境复杂,管柱多次发生穿孔,套管腐蚀严重。在渤海某油田实际注水井取水样,分析其水质和细菌类型,并以现场水样为腐蚀介质进行模拟试验,开展了注水井水样中的微生物腐蚀性评价,对比分析了加入杀菌剂或缓蚀剂前后N80钢、3Cr钢和13Cr钢等在对应环境中的腐蚀速率,并建立了长期腐蚀速率预测模型。结果表明:微生物腐蚀是造成渤海油田注水井管柱腐蚀的主要原因,注入水中的细菌以硫酸盐还原菌(SRB)和铁氧化细菌(IOB)为主,杀菌剂可有效降低油套管的腐蚀速率;N80钢和3Cr钢在微生物环境中的均匀腐蚀速率分别为0.58 mm·a-1和0.27 mm·a-1,加入杀菌剂后的均匀腐蚀速率分别为0.18 mm·a-1和0.13 mm·a-1,N80钢在不加杀菌剂的环境中无法满足生产要求;低浓度杀菌剂对注水井油套管的微生物腐蚀具有明显的抑制作用,选用3Cr材质并加入低浓度杀菌剂能够满足注水井的防腐蚀要求。
Abstract
The downhole environment of water injection wells in Bohai oilfield is complex, and the string perforation and casing corrosion are serious. The water samples were taken from the actual water injection wells in an oilfield in Bohai, and the water quality and bacterial types were analyzed. The field water samples were used as corrosive media to carry out the simulation test. The microbial corrosion evaluation in the water injection wells was carried out. The corrosion rates of N80 steel, 3Cr steel and 13Cr steel in the corresponding environment before and after adding fungicides or corrosion inhibitors were compared and analyzed, and the long-term corrosion rate prediction model was established. The results showed that microbial corrosion was the main reason for the corrosion of water injection well string in Bohai Oilfield. The bacteria in the injected water were mainly sulfate reducing bacteria (SRB) and iron oxidizing bacteria (IOB), and the bactericide can effectively reduced the corrosion rate of tubing and casing. The uniform corrosion rates of N80 steel and 3Cr steel in microbial environment were 0.58 mm·a-1 and 0.27 mm·a-1, respectively. The uniform corrosion rates after adding fungicide were 0.18 mm·a-1 and 0.13 mm·a-1, respectively. N80 steel could not meet the production requirements in the environment without fungicide. Low concentration bactericide had obvious inhibitory effect on the microbial corrosion of oil casing in water injection wells. The selection of 3Cr material and the addition of low concentration bactericide could meet the anti-corrosion requirements of water injection wells.
中图分类号 TG147 DOI 10.11973/fsyfh-202306016
所属栏目 应用技术
基金项目 国家重大专项“渤海油田高效开发示范工程”(2016ZX05058-002)
收稿日期 2021/11/10
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: XIE Tao,LIN Hai,XU Kun,YAN Wei,WANG Guiping. Corrosion Mechanism of Oil Casing in Water Injection Well in Bohai Oilfield[J]. Corrosion & Protection, 2023, 44(6): 103
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】高永华,于洪旭,李康,等.绥中36-1油田注水井管材腐蚀机理分析及应对措施[J].涂层与防护,2018,39(1):1-5.
【2】郑举,厉嘉滨,李敏,等.海上油田注水井套管腐蚀机理及腐蚀控制技术研究[J].全面腐蚀控制,2013,27(9):61-66.
【3】刘长松,张强德.中原油田套管内腐蚀机理及腐蚀控制技术[J].石油钻采工艺,2007,29(5):107-110,126.
【4】曹怀山,谭云贤,罗杨,等.注水井腐蚀原因分析及防护对策[J].石油与天然气化工,2010,39(2):151-154,89.
【5】史春轩,赵中华,张新杰,等.注水井管柱腐蚀分析及防护措施的应用[J].石油矿场机械,2006,35(3):87-89.
【6】张俊,李连波,石志强.N80油井注水管腐蚀失效分析[J].腐蚀与防护,2008,29(4):226-228.
【7】崔波,王洪斌,冯浦涌,等.绥中36-1油田注水井堵塞原因分析及对策[J].海洋石油,2012,32(2):64-70.
【8】李勇,杨肖曦,赵磊,等.现河注水井井筒腐蚀及其机理研究[J].腐蚀科学与防护技术,2007,19(1):66-68.
【9】VIGNERON A,ALSOP E B,CHAMBERS B,et al.Complementary microorganisms in highly corrosive biofilms from an offshore oil production facility[J].Applied and Environmental Microbiology,2016,82(8):2545-2554.
【10】BOURDOISEAU J A,JEANNIN M,RÉMAZEILLES C, et al.The transformation of mackinawite into greigite studied by Raman spectroscopy[J].Journal of Raman Spectroscopy,2011,42(3):496-504.
【11】CHEN D S,ZHOU Y Z,LIU M,et al.Studies on corrosion behavior of Q235 steel by iron bacteria,sulfate-reducing bacteria and total general bacteria in sedimentary water of storage tank[J].Advanced Materials Research,2011,337:281-284.
【2】郑举,厉嘉滨,李敏,等.海上油田注水井套管腐蚀机理及腐蚀控制技术研究[J].全面腐蚀控制,2013,27(9):61-66.
【3】刘长松,张强德.中原油田套管内腐蚀机理及腐蚀控制技术[J].石油钻采工艺,2007,29(5):107-110,126.
【4】曹怀山,谭云贤,罗杨,等.注水井腐蚀原因分析及防护对策[J].石油与天然气化工,2010,39(2):151-154,89.
【5】史春轩,赵中华,张新杰,等.注水井管柱腐蚀分析及防护措施的应用[J].石油矿场机械,2006,35(3):87-89.
【6】张俊,李连波,石志强.N80油井注水管腐蚀失效分析[J].腐蚀与防护,2008,29(4):226-228.
【7】崔波,王洪斌,冯浦涌,等.绥中36-1油田注水井堵塞原因分析及对策[J].海洋石油,2012,32(2):64-70.
【8】李勇,杨肖曦,赵磊,等.现河注水井井筒腐蚀及其机理研究[J].腐蚀科学与防护技术,2007,19(1):66-68.
【9】VIGNERON A,ALSOP E B,CHAMBERS B,et al.Complementary microorganisms in highly corrosive biofilms from an offshore oil production facility[J].Applied and Environmental Microbiology,2016,82(8):2545-2554.
【10】BOURDOISEAU J A,JEANNIN M,RÉMAZEILLES C, et al.The transformation of mackinawite into greigite studied by Raman spectroscopy[J].Journal of Raman Spectroscopy,2011,42(3):496-504.
【11】CHEN D S,ZHOU Y Z,LIU M,et al.Studies on corrosion behavior of Q235 steel by iron bacteria,sulfate-reducing bacteria and total general bacteria in sedimentary water of storage tank[J].Advanced Materials Research,2011,337:281-284.
相关信息