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[1]王善哲.原油集输季节性停掺管道内腐蚀失效行为及防控对策[J].油气储运,2024,43(12):1-19.
　WANG Shanzhe.Failure behaviors and prevention measures of internal corrosion in pipelines with seasonal water mixing stoppage for crude oil gathering[J].Oil & Gas Storage and Transportation,2024,43(12):1-19.
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原油集输季节性停掺管道内腐蚀失效行为及防控对策

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 43 期数: 2024年12期 页码: 1-19 栏目: 出版日期: 2024-12-25
Title:
Failure behaviors and prevention measures of internal corrosion in pipelines with seasonal water mixing stoppage for crude oil gathering

作者:
王善哲
中国石油大庆油田有限责任公司第二采油厂

Author(s):
WANG Shanzhe
Oil Recovery Plant No. 2, PetroChina Daqing Oilfield Company Limited, Daqing, Heilongjiang

关键词:
掺水管道; 腐蚀失效; 腐蚀防控; 停掺集输; 数值模拟
Keywords:
water mixing pipeline;  corrosion failure;  corrosion prevention;  gathering of water mixing stoppage;  numerical simulation
分类号:
TE986
文献标志码:
A
摘要:
【目的】季节性停掺已成为原油集输系统优化运行、节能减碳与精细化管理的解决方案之一，但复杂物性流体介质及变工况运行导致掺水管道失效率增大，特别是其具有敷设倾角的特征区域成为了腐蚀失效的重点，相比于其它运行工况较为稳定的回油管道、注水管道，掺水管道的服役周期被严重削减，且失效更集中于冬季，影响集输系统运行，维修更换管道的综合成本更高。【方法】围绕季节性停掺管道的内腐蚀防护，基于对腐蚀管段、产物的介质特性分析，通过数值模拟方法研究对比了掺水运行与停掺过程特征区域的腐蚀失效行为，提出并评价了季节性停掺管道清水顶替和压缩空气扫线的腐蚀防控对策。【结果】电化学腐蚀和冲蚀协同贡献于掺水管道的内腐蚀行为而形成Fe2O3、FeS、CaCO3、MgCO3、CaSiO3、MgSiO3及SiO2等腐蚀产物，在季节性停掺运行中，受管道特征区域积液量和积液时长的影响，腐蚀失效特征明显；清水顶替和压缩空气扫线措施均能够有效抑制掺水管道停掺期间的腐蚀失效行为，在相同工况下，前者可使最大腐蚀速率平均降低85%，后者可使腐蚀深度平均减小65%。【结论】综合考虑措施防控效果及集输工艺设施的可操作性，清水顶替更具工程应用的适用性和前景。优选出了季节性停掺管道清水顶替对策，为油田原油集输系统的完整性管理和安全高效运行提供了依据和方法。

Abstract:
[Objective]Seasonal water mixing stoppage has become one of the solutions for optimizing the operation, energy saving, carbon reduction and refined management of crude oil gathering system. Compared to another pipelines like oil gathering and water injecting which the operating condition is relatively stable, the water mixing pipeline tends to be affected, give rise to the service cycle severely reduced, and the pipeline failure is more frequent in winter production. It affects the operation of the gathering and transportation system, and the comprehensive cost of repairing and replacing the pipeline is higher. [Methods]The complex physical properties of the fluid medium and variable operating conditions lead to the water mixing pipelines, especially in those areas with characteristic of installation inclination, becoming the focus of corrosion failure. This work focuses on the internal corrosion protection of pipelines with seasonal water mixing stoppage. The corrosion failure behavior in characteristic areas during water mixing and stoppage processes by numerical simulation, then the corrosion prevention measures of clean water replacement and compressed air sweeping in pipelines with seasonal water mixing stoppage are proposed and evaluated. [Results]The results indicate that electrochemical corrosion and erosion synergistically contribute to the internal corrosion of water mixing pipelines, resulting in the formation of corrosion products such as Fe2O3、FeS、CaCO3、MgCO3、CaSiO3、MgSiO3 and SiO2. During the operation of seasonal water mixing stoppage, the corrosion failure characteristics are significantly affected by the liquid accumulation and duration in characteristic areas of pipelines. Both measures of clean water replacement and compressed air sweeping can effectively suppress the corrosion failure behavior during the water mixing stoppage. Under the same operating conditions, the clean water replacement can reduce the maximum average corrosion rate by 85%, while the compressed air sweeping can reduce the average corrosion depth by 65%. [Conclusion]Considering the effectiveness of the prevention measures and the operability of the gathering facilities, the clean water replacement is more suitable for engineering applications and has better prospects. The findings provide a basis and method for integrity management and efficient operation of crude oil gathering and transportation systems in oilfields.

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备注/Memo

基金项目：黑龙江省重点研发计划项目“化学驱采出液相间作用机制与绿色高效分离关键技术研究”，JD22A004。
作者简介：王善哲，男，1991生，工程师，2016年硕士毕业于东北石油大学油气储运工程专业，现主要从事管道完整性、油田新能源专业方向的研究工作。地址：黑龙江省大庆市红岗区第二采油厂工艺研究所，163414。电话：17728111777。Email：1229372826@qq.com。

更新日期/Last Update: 2024-08-15