当前位置：首页 > 过刊浏览->2025年第51卷第6期
密相CO2海底管道流动保障模拟研究
Flow assurance simulation for dense-phase CO2 subsea pipeline
浏览(402) 下载(2)
- DOI:
- 10.3969/j.issn.1001-2206.2025.06.009
- 作者:
- 颜筱函
YAN Xiaohan
- 作者单位:
- 中国海洋石油集团有限公司, 北京 100010
CNOOC LIMITED, Beijing 100010, China
- 关键词:
- 密相CO2; 海底管道; 管道泄放; 冲压; 低温效应
dense-phase CO2;subsea pipeline;pipeline release;pressurization;low-temperature effect
- 摘要:
- 在海底管道输送密相CO2过程中，由于现场实际操作条件复杂，管道内流体可能发生瞬态变化，导致管道运行工况偏离正常范围，因此开展流动保障仿真模拟研究对密相CO2管道的设计具有重要意义。采用OLGA软件，基于含杂质密相CO2物理性质的分析，开展管道运行敏感性分析、计划性泄放模拟，以及初始启动前冲压的模拟。以某海上油田工程项目为例，总结了影响管道稳态运行的敏感因素，分析了不同阀门开度对泄放过程中管道沿线压力、温度、持液率的影响，并监测了冲压过程中压力与温度的变化。结果表明，在管道运行中应尽量避免较大幅度输量波动，泄放过程中适当减小泄放阀门开度降低泄放速度，加压操作宜采用多级增压方式，上述措施均能够保障管道运行的稳定性和安全性，规避低温效应对管道带来的风险。
In the process of transporting dense-phase CO2 through subsea pipelines, complex transient flow variation in the pipeline may occur due to practical operational requirements on site, which may lead to abnormal operating conditions of the pipeline. Therefore, conducting a flow assurance simulation study is of great significance for pipeline design. Based on the analysis of the physical properties of impure dense-phase CO2, the simulation on sensitivity analysis of pipeline operation, planned pipeline release, and pressurization before initial start-up was carried out by OLGA software. Taking an offshore oil field engineering project as an example, the sensitive factors of the pipeline in steady-state operation were summarized, and the influence of different valve openings on the pressure, temperature, and liquid holdup along the pipeline during the release process was analyzed. The variation of pressure and temperature during the pressurization process was monitored. The results indicate that minimizing flow fluctuations during pipeline operation, reducing the valve opening during the relief process to lower the relief flow rate, and selecting multi-stage pressurization measures for pressurization operation can ensure the stability and safety of pipeline operation and avoid the risk of low-temperature effects.