高温高压气井中超级13Cr油管环空断裂的原因
Annular Fracture Reason of Super 13Cr Oil Tubing Used in High Pressure and High Temperature Gas Well
摘 要
采用化学成分分析、力学性能分析、显微组织观察等分析了服役于高温高压气井环境中超级13Cr油管的环空断裂失效原因。结果表明：失效油管外表面分布大量树枝状裂纹，并具有多层腐蚀产物结构，其断裂属于应力腐蚀开裂，钻井液污染磷酸盐环空保护液是导致失效的主要环境因素，环空保护液漏失形成的高油套压差而导致油管外表面承受高环向拉应力是导致失效的主要受力因素。
超级13Cr油管
应力腐蚀开裂
环空保护液
HPHT gas well
super 13Cr oil tubing
stress corrosion cracking
annular protection fluid
Abstract
The aging reasons for annulus fracture failure of super 13Cr tubing used in a high temperature and high pressure gas wells were analyzed by means of chemical composition analysis, mechanical performance analysis and microstructure observation. The results showed that there were a large number of dendritic cracks on the outer surface of the failed tubing, and the surface had a multi-layer corrosion product structure. The fracture belonged to stress corrosion cracking. Phosphate annulus protection fluid contaminated by drilling fluid was the main environmental factor leading to failure. The leakage of annulus protection fluid led to the formation of high casing pressure difference and thus caused high hoop tensile stress on the outer surface of the tubing, which was the main force factor leading to failure.
中图分类号 TG172 DOI 10.11973/fsyfh-202202013
所属栏目 失效分析
基金项目 国家重大专项（2016ZX05051003）；中石油股份重大专项（2018E-1809）
收稿日期 2020/6/21
修改稿日期
网络出版日期
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引用该论文: GENG Hailong,LONG Yan,ZHAO Mifeng,FU Anqing,ZHANG Xuesong,WANG Peng,XU Penghai. Annular Fracture Reason of Super 13Cr Oil Tubing Used in High Pressure and High Temperature Gas Well[J]. Corrosion & Protection, 2022, 43(2): 68
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参考文献
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【3】姚小飞, 谢发勤, 吴向清, 等. Cl-浓度对超级13Cr油管钢应力腐蚀开裂行为的影响[J]. 材料导报, 2012, 26(18):38-41.
【4】WRIGHT E J, WILFAHRT B D. Optimized materials for high integrity well completions[C]//Proceedings of the Twenty-seventh (2017) International Ocean and Polar Engineering Conference. San Francisco:[s.n.], 2017.
【5】PICCOLO E L, SCOPPIO L, NICE P I, et al. Corrosion and environmental cracking evaluation of high density brines for use in HPHT fields[C]//All Days. May 17-19, 2005.The Woodlands, Texas:SPE, 2005.
【6】王鹏, 王新虎, 韩礼红, 等. 高温高压井油管完井液导致应力腐蚀开裂分析[J]. 金属热处理, 2015, 40(10):191-194.
【7】LIU W Y, SHI T H, LU Q, et al.Failure analysis on fracture of S13Cr-110 tubing[J].Engineering Failure Analysis, 2018, 90:215-230.
【8】李冬梅, 杜春朝, 刘菊泉, 等.封隔液及其应用现状研究[J].长江大学学报(自然科学版), 2012, 9(12):86-89.
【9】刘克斌, 周伟民, 植田昌克, 等. 超级13Cr钢在含CO2的CaCl2完井液中应力腐蚀开裂行为[J]. 石油与天然气化工, 2007, 36(3):222-226.
【10】MOWAT D E, EDGERTON M C, WADE E H R.Erskine field HPHT workover and tubing corrosion failure investigation[C]//All Days.February 27-March 1, 2001.Amsterdam, Netherlands:SPE, 2001.
【11】UEDA M, NAKAMURA K, HUDSON N, et al. Corrosion Behavior of Super 13Cr Martensitic Stainless Steels in Completion Fluids[J]. Brazilian Journal of Pharmaceutical Science, 2003, 49(2):367-371.
【12】HENKE T, CARPENTER J. Cracking Tendencies of two martensitic stainless alloys in common heavy completion brine systems at downhole conditions:a laboratory investigation[J]. Journal of Antibiotics, 2004, 51(9):845-51.
【13】周伟民. 13Cr和super13Cr不锈钢在CO2饱和的CaCl2完井液中的应力腐蚀开裂[D]. 武汉:华中科技大学, 2007.
【14】胡世炎. 机械失效分析手册[M]. 成都:四川科学技术出版社, 1989.
【15】耿东士, 何纶, 李道芬, 等. 钻井液中硫化氢的危害及其控制[J]. 钻井液与完井液, 2007, 24(S1):1-3, 125.
【16】石慧英, 唐聿明, 左禹. PO43-对304不锈钢在氯离子水溶液中小孔腐蚀形核过程的影响[J]. 中国腐蚀与防护学报, 2013, 33(1):36-40.
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