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试验研究

塔河油田H2S-CO2-O2共存体系下伴生气管道选材和内涂层评价

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  • 1.中国石油化工股份有限公司西北油田分公司中国石化缝洞型油藏提高采收率重点实验室,新疆 乌鲁木齐 830011;2.西南石油大学石油与天然气工程学院,四川 成都 610500
肖雯雯(1986-),工程师,主要从事油田防腐工作,电话:0991-3161211,E-mail:53329174@qq.com

收稿日期: 2022-08-16

  修回日期: 2022-09-14

  录用日期: 2022-10-15

  网络出版日期: 2023-02-15

Material Selection and Evaluation on Internal Coating of Associated Gas Pipeline in H2S-CO2-O2 Coexistence System in Tahe Oilfield

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  • 1.SINOPEC Key Laboratory of Enhanced Recovery for Fracture-Cave Oil Reservoir,SINOPEC Northwest Oilfield Company,Urumqi 830011,China;2.School of Oil and Gas Engineering,Southwest Petroleum University,Chengdu 610500,China

Received date: 2022-08-16

  Revised date: 2022-09-14

  Accepted date: 2022-10-15

  Online published: 2023-02-15

摘要

研究伴生气管道常用3 种管材在H2S-CO2-O23 种气体共存体系下的腐蚀行为,可为塔河油田伴生气管道的腐蚀防控提供指导依据。基于塔河油田典型腐蚀工况,以20 钢、L245NS 钢和3Cr 钢为研究对象,利用高温高压釜试验对3 种钢材典型H2S-CO2-O2共存工况下的腐蚀速率和腐蚀产物进行研究,得到20 钢腐蚀速率最大,L245NS 钢腐蚀速率次之,3Cr 钢腐蚀速率最小,3 种管材的腐蚀产物主要是Fe、FeS、FeCO3和Fe2O3。对塔河油田4种典型内防腐涂层进行腐蚀前后增重法和附着力测试研究涂层的耐蚀行为,涂层2 的抗腐蚀性能和附着力效果最好。考虑性价比,最后选用“L245NS+涂层2”作为塔河油田伴生气管线的防腐措施。

本文引用格式

肖雯雯, 张文博, 林德云, 葛鹏莉, 许艳艳, 廖柯熹, 杨娜 . 塔河油田H2S-CO2-O2共存体系下伴生气管道选材和内涂层评价[J]. 材料保护, 2023 , 56(2) : 44 -50 . DOI: 10.16577/j.issn.1001-1560.2023.0033

Abstract

 To study the corrosion behavior of three commonly used steels in associated gas pipelines in the three-gas coexistence system of H2S-CO2-O2 can provide guidance for the corrosion prevention and control of associated gas pipelines in Tahe oilfield.Based on the typical corrosion working conditions in Tahe oilfield and taking 20 steel,L245NS steel and 3Cr steel as the research objects,the corrosion rates and corrosion products of the three steels under typical working conditions in H2S - CO2- O2 coexistence system were studied through high -temperature and high-pressure reactor experiment.Results showed that the corrosion rate of 20# steel was the highest,followed by L245NS steel,and the corrosion rate of 3Cr steel was the lowest.The corrosion products of the three pipes were mainly Fe,FeS,FeCO3 and Fe2O3.The corrosion resistance behaviors of four typical internal anti-corrosion coatings in Tahe oilfield were studied through an adhesion test and the weight gain method that involved the measuring of the weight gain before and after corrosion,and the results indicated that coating 2 possessed the optimal corrosion resistance and adhesion.Considering the cost performance,“L245NS+coating 2”was finally selected as the anti-corrosion measure for the associated gas pipelines in Tahe Oilfield.

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