非金属管在酸性环境应用存在的问题

Problems in application of non-metallic pipes in acidic environment

齐国权¹; 2;  戚东涛¹; 2;  魏斌¹; 2;  李厚补¹; 2;  丁楠¹; 2;  蔡雪华¹; 2;  张冬娜¹; 2

1. 中国石油集团石油管工程技术研究院, 陕西西安 710077;
2. 中国石油天然气集团公司石油管工程重点实验室, 陕西西安 710077

QI Guoquan¹; 2;  QI Dongtao¹; 2;  WEI Bin¹; 2;  LI Houbu¹; 2;  DING Nan¹; 2;  CAI Xuehua¹; 2;  ZHANG Dongna¹; 2

1. Tubular Goods Research Institute of CNPC, Xi'an, Shaanxi, 710077;
2. Key Laboratory for Petroleum Tubular Goods Engineering of CNPC, Xi'an, Shaanxi, 710077

非金属管; 酸性环境; H₂S; 适用性

non-metallic pipe; acidic environment; H₂S; applicability

随着大规模高含硫化氢(H₂S)天然气田的开发,用于酸性油气田的非金属管材备受关注。非金属管在应用过程中存在诸多问题:缺乏适用性评价技术及选材规范,接头连接易失效,非金属管压力等级评定不合理,气体渗透机理与规律不明确等。对上述问题进行了原因分析,进而提出了非金属管在酸性环境中应用的建议:提高抗硫非金属管的管体与接头制备技术水平,制定酸性气田用非金属管的相关标准规范,完善非金属管材在酸性环境中的长期服役评价技术,开展抗硫非金属管的现场应用及其配套技术研究。

With intensive development of gasfields with high H₂S, non-metallic pipes for acidic gasfields have attracted more and more concerns. However, there are many problems in application of non-metallic pipes, such as absence of relevant codes and standards with regard to applicability evaluation and material selection, joints prone to fail, unreasonable rating of pressures in non-metallic pipes, uncertainties in gas seepage mechanism and patterns. In this paper, above problems are described and analyzed. Then, relevant suggestions are proposed for deployment of non-metallic pipes in acidic environments. For instance, techniques for fabrication of non-metallic pipes and joints with necessary sulfur-protection properties should be improved, necessary codes and standards should be stipulated for non-metallic pipes used in sour gasfields, assessments should be promoted for long-term services of non-metallic pipes in sour environment, and more researches should be made on on-site application and relevant matching technologies for sulfur-resistant non-metallic pipes.