随着渤海油田的快速发展，CO2腐蚀成为阻碍油气田开发的关键因素之一，由 CO2引起的油气井管材腐蚀破坏问题日益严峻，严重影响井下管柱的使用寿命，制约着渤海油田降本增效的发展目标。综述了CO2对井下管柱的腐蚀机理及影响因素，总结了渤海油田中油气产量较高区块的CO2腐蚀情况及防腐选材研究现状，针对性调研了绥中36-1、埕北等10个油田的生产井的CO2分压、温度分布及腐蚀情况，探讨了渤海油田水介质、pH值、CO2分压、温度对CO2腐蚀的影响规律。结果表明CO2分压小于0.023 MPa时，碳钢油管未发现严重腐蚀；当CO2分压超过0.2 MPa时，井下管柱腐蚀破坏率迅速增加， CO2分压为0.3 MPa时，碳钢油管腐蚀比例约为19.15%，这和理论研究一致。在渤海油田油气开发生产过程中，各种因素可能同时出现，并相互作用，加剧管材的 CO2腐蚀。合金元素 Cr能显著提高油套管的抗腐蚀性，低Cr钢具有良好的耐腐蚀性能和经济性，未来低Cr油套管在渤海油田的适应性评价需要开展进一步的研究。
With the rapid development of Bohai oilfield, CO2 corrosion becomes one of the key factors tohinder the de-velopment of oil and gas fields. Corrosion damage problem of tubing and casing caused by CO2corrosion is becoming more and more serious in oil and gas wells, which has a serious influence on the working life of downhole tubing and restricts the “reduc-ing costs and increasing benefits” development goals of Bohai oilfield. This paper reviewed CO2 corrosion mechanism of downhole tubing and its influencing factors, as well as the research status of anti-corrosion materials, summarized the corrosion situation of production wells for high oil and gas production blocks in Bohai oilfield, especially investigated CO2 partial pres-sure, temperature distribution and corrosion situation of production wells of SZ 36-1, CB and other 10 oilfields. Meanwhile, the influence laws of water medium, pH value, CO2 partial pressure on CO2corrosion were discussed, and the results showed that carbon steel tubing had no serious corrosion whenCO2p<0.023 MPa; Corrosion damage rate of downhole tubing increased ra- pidly whenCO2p>0.2 MPa; Corrosion damage rate was about 19.15% whenCO2p was 0.3 MPa, which wasin accordance with theoretical research. In the process of oil and gas development and production of Bohai oilfield, various factors might ap-pear at the same time and interact with each other, which aggravated CO2 corrosion. The alloy element Cr could significantly increase the corrosion resistance of oil casing and tubing, and low Cr steels had good corrosion resistance and economy. The adaptability evaluation of low Cr casing and tubing in Bohai oilfield needs further research in the future.
参考文献
| [1] | 周琦;徐鸿麟;周毅;刘斌.二氧化碳腐蚀研究进展[J].兰州理工大学学报,2004(6):30-34. |
| [2] | 路民旭;白真权;赵新伟;赵国仙;罗金恒;陈长风.油气采集储运中的腐蚀现状及典型案例[J].腐蚀与防护,2002(3):105-113. |
| [3] | 陈茂军;罗兴.高含H2S和CO2天然气井中的钻采设备防腐措施[J].表面技术,2006(1):80-82,90. |
| [4] | 万里平;孟英峰;梁发书.油气田开发中的二氧化碳腐蚀及影响因素[J].全面腐蚀控制,2003(2):14-17. |
| [5] | 姚晓;冯玉军.国内外气田开发中管内CO2腐蚀研究进展[J].油气储运,1996(02):12. |
| [6] | 周波;崔润炯.浅谈 CO2对油井管的腐蚀及抗蚀套管的开发现状[J].钢管,2003(1):21-24. |
| [7] | 王成达;严密林;赵新伟;李平全;王辉.油气田开发中H2S/CO2腐蚀研究进展[J].西安石油大学学报（自然科学版）,2005(5):66-70. |
| [8] | 李国敏;李爱魁;郭兴蓬;郑家燊.油气田开发中的CO2腐蚀及防护技术[J].材料保护,2003(6):1-5. |
| [9] | 陈长风 .油套管钢CO<,2>腐蚀电化学行为与腐蚀产物膜特性研究[D].西北工业大学,2002. |
| [10] | 李春福 .油气开发过程中的CO<,2>腐蚀机理及防护技术研究[D].西南石油学院,2005. |
| [11] | 陈东;柳伟;路民旭;吴荫顺;侯世颖;陈迎锋.CO2分压对N80钢腐蚀产物膜保护性能的影响[J].北京科技大学学报,2007(3):288-292. |
| [12] | 杨光;王亚刚;金小春;牛保伦;霍洪俊.油气井二氧化碳腐蚀研究[J].全面腐蚀控制,2008(5):24-26. |
| [13] | J. K. Heuer;J. F. Stubbins.Microstructure analysis of coupons exposed to carbon dioxide corrosion in multiphase flow[J].Corrosion: The Journal of Science and Engineering,19987(7):566-575. |
| [14] | 黄天杰;殷安会;刘智勇;赵博;徐彤.吉林油田矿场条件下CO2腐蚀模拟装置的建立及实验研究[J].表面技术,2015(3):69-73. |
| [15] | 陈长风;路民旭;赵国仙;白真权;严密林;杨延清.N80油套管钢CO2腐蚀产物膜的力学性能[J].金属学报,2003(2):175-181. |
| [16] | 张强;杨文忠;唐永明;顾春元;周拾庆;仓辉;丁毅.N80钢在江苏油田水中的应力腐蚀行为研究[J].腐蚀与防护,2006(2):66-68. |
| [17] | LI Da-peng,李大朋,MA Wen-hai,马文海,ZHANG Lei,张雷,LU Min-xu,路民旭,WANG Lei,王蕾.温度对油管钢CO2腐蚀行为的影响[C].NACE东亚及太平洋地区国际腐蚀大会暨第三届NACE上海国际腐蚀年会论文集,2012:81-84. |
| [18] | Hou Jianguo;安维杰;常炜;陈长风;张国安;路明旭;孙冬柏.原油对CO2腐蚀影响的模拟研究[J].中国海上油气,2005(1):60-64. |
| [19] | 高斐;楼一珊;李忠慧;浦尚树;韩福伟;郑旋;常公喜.油气井下CO2动态腐蚀模拟试验装置的研制[J].材料保护,2014(7):48-51,66. |
| [20] | M. B. Kermani;A. Morshed.Carbon Dioxide Corrosion in Oil and Gas Production -- A Compendium[J].Corrosion: The Journal of Science and Engineering,20038(8):659-683. |
| [21] | 耿春雷;顾军;徐永模;翁端.油气田中C02/H2S腐蚀与防护技术的研究进展[J].材料导报,2011(1):119-122. |
| [22] | 徐士祺;曹宝格;郝上京.温度对油气管道的CO2腐蚀速率的影响研究[J].管道技术与设备,2007(3):32-33. |
| [23] | 朱培珂;邓金根;闫伟;李明洋;吴山;彭程.3Cr钢和13Cr钢在高矿化度CO2环境中的腐蚀行为[J].腐蚀与防护,2014(12):1221-1225. |
| [24] | 闫伟 .油套管CO2腐蚀规律及材质优化设计技术[D].中国石油大学(北京),2012. |
| [25] | 杨建炜;张雷;路民旭.油气田CO2/H2S共存条件下的腐蚀研究进展与选材原则[J].腐蚀科学与防护技术,2009(4):401-405. |
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