多起伏大高差油气混输管道停输和再启动瞬态流动规律研究

Study on the Transient Flow Law of Shutdown and Restart of Oil and Gas Mixed Pipelines with Multiple Fluctuations and Large Height Differences

李嘉宁 杜胜男 范开峰 晁凯 黄雪松 李伟 王卫强

Jianing Li Shengnan Du Kaifeng Fan Kai Chao Xuesong Huang Wei Li Weiqiang Wang

辽宁石油化工大学 石油天然气工程学院，辽宁 抚顺 113001 中国石化中原油田分公司 石油工程技术研究院，河南 濮阳 457000 中国石化中原油田分公司 内蒙采油厂，内蒙古 巴彦淖尔 015000

College of Petroleum Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China Petroleum Engineering Technology Institute，Zhongyuan Oilfield Company SINOPEC，Puyang Henan 457000，China Inner Mongolia Oil Production Plant，Zhongyuan Oilfield Company SINOPEC，Bayannur Inner Mongolia 015000，China

采用OLGA软件建立了某油气混输管道几何模型，研究了管道停输和再启动过程中的瞬态流动规律。首先，分析了管道稳态运行时沿线温度、压力和持液率的分布特点，确定了沿线温度最小值所处位置及压力最大值所处位置，分析了环境温度和停输时间对运行参数的影响，确定了可保证温度最低点处原油温度高于其凝点的安全停输时间。在实际运行过程中，停输时间不应超过安全停输时间，否则容易出现管道凝管、启动压力过大等问题，威胁管道的安全运行。

The geometric model of a certain oil and gas mixed transportation pipeline was established with OLGA software, and the transient flow law during the pipeline shutdown and restart process was studied. First, the distribution characteristics of temperature, pressure and liquid holdup along the pipeline during steady state operation were analyzed, and the location of the minimum temperature and the location of the maximum pressure along the pipeline were determined. The influence of environmental temperature and shutdown time on operating parameters were analyzed. The safe shutdown time when the minimum temperature temperature is higher than its freezing point was determined. In the actual operation process, the shutdown time should not exceed the safe shutdown time, otherwise problems such as pipeline condensation and excessive starting pressure will easily occur, which threaten the safety of the pipeline.

辽宁省教育厅项目(L20190008)

10.3969/j.issn.1672-6952.2022.02.009