摘要: |
针对5个公司在CO2 和H2S共存酸性环境下石油管材(OCTG)选材规范及NACE MR0175/ISO 15156标准进行对比分析。对影响管材安全性的因素进行分析,给出各环境条件下不同公司选材规范之间的异同和适用范围。研究综合选材方案及操作步骤,编制OCTG材料综合选材软件。以新疆油田三高气井(高温、高压、高硫化氢环境)为例进行具体分析,给出影响材料抗腐蚀性能的计算公式,并根据材料的不同性质选择不同的选材准则。结果表明:影响酸性环境下OCTG选材的主要因素为H2S分压和CO2分压、温度及Cl-含量;得到了最优的选材推荐区间。 |
关键词: CO2和H2S 酸性环境 石油管材 材料选用 腐蚀气体 |
DOI:10.3969/j.issn.1673-5005.2015.04.022 |
分类号::TG 172.3 |
基金项目:国家自然科学基金项目(51274231,8);中石油集团公司重点实验室课题(2014A-4214) |
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Material selection of OCTG in sour environment with CO2 and H2S coexisting |
YAN Yifei1, DONG Wei1, SHAO Bing1, NI Yuanyong2, YAN Xiangzhen3
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(1.College of Electromechanical Engineering in China University of Petroleum, Qingdao 266580, China;2.Oil and Gas CAE Technology Research Center, China University of Petroleum, Qingdao 266580, China;3.PetroChina Huabei Oilfield Company, Renqiu 062550, China)
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Abstract: |
Through analyzing different guidelines of five companies and NACE MR0175/ISO 15156 for material selection of OCTG in sour environment with CO2 and H2S coexisting, the main factors were summarized and the difference among them was analyzed. Research was conducted on material selection and operation steps, and corresponding software was developed. Three-high (high temperature, high pressure and high H2S) gas wells in Xinjiang Oilfield were taken for example in this study, the formula for anti-corrosion performance calculation was given, and the material selection was done according to different guidelines depending on the material properties. The results show that the main factors that influencing the choosing of OCTG material are H2S pressure, CO2 pressure, temperature and Cl- content. The optimum material selection recommending interval is given. |
Key words: CO2 and H2S sour environment OCTG material selection corrosion gas |