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苏里格气田智能阴极保护系统误报警成因分析与优化
Analysis and optimization of false alarm causes of intelligent cathodic protection system in Sulige Gas Field
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- DOI:
- 10.3969/j.issn.1001-2206.2026.01.012
- 作者:
- 曹改瑜, 吴龙, 谢本彬, 张文涛, 付洋
CAO Gaiyu, WU Long, XIE Benbin, ZHANG Wentao, FU Yang
- 作者单位:
- 中国石油长庆油田(榆林)油气有限公司, 陕西榆林 710018
China Petroleum Changqing Oilfield (Yulin) Oil and Gas Co., Ltd., Yulin 710018, China
- 关键词:
- 智能桩报警; 阴极保护判据; 保护电流密度; 全域电连接; 逻辑矛盾
intelligent pile alarm;cathodic protection criterion;protection current density;full-domain electrical connection;logical contradiction
- 摘要:
- 苏里格气田智能化阴极保护系统运行过程中测试桩频繁误报警，严重影响系统可靠性。通过现场测试与数据分析，揭示问题根源并提出相应优化策略。研究发现：现行-0.85 V（CSE）的保护判据在苏里格特殊工况下过于保守，建议将控制阈值调整为-0.75 V（CSE）；环氧粉末涂层的应用使实际保护电流密度（14.67 μA/m2）显著高于设计值（8~10 μA/m2）；全域电连接导致的宏电流效应加剧了保护电位分布不均；恒电位仪采用含IR降的通电电位作为控制信号，与智能桩监测的断电电位之间存在技术逻辑矛盾。针对发现的问题，提出构建“智能桩监测-断电电位反馈-恒电位仪输出修正”的闭环控制系统，取消智能测试桩通断器，以通电电位代替断电电位的技术路线，解决了误报警问题。研究成果可为同类气田阴极保护系统的智能化改造提供参考。
During the operation of the intelligent cathodic protection system at the Sulige Gas Field, frequent false alarms from test piles severely impact system reliability. Through field testing and data analysis, the root causes were identified, and optimization strategies were proposed. The study reveals that the current protection criterion of -0.85 V(CSE) proves overly conservative under Sulige’s special operating conditions, so recommend to adjust the control threshhold to -0.75 V(CSE). The application of epoxy powder coating results in actual protection current density (14.67 μA/m2) significantly exceeding design values (8~10 μA/m2). The macro-current effect caused by full-domain electrical connections exacerbates uneven protection potential distribution. The potentiostat takes the on potential (including IR drop) as control signal, which presents contradiction in technical logic with switch-off potential monitoring by intelligent piles. To address these issues, a closed-loop control system integrating“intelligent pile monitoring, switch-off potential feedback, and potentiostat output correction”was proposed. By eliminating intelligent test pile switches and replacing switch-off potential monitoring with turn on potential measurement, the false alarm problem was resolved. The research findings provide valuable references for intelligent retrofitting of cathodic protection systems in similar gas fields.