长输油管道砂沉积模拟实验及临界流速计算分析

摘要

In order to study the variation of sand sedimentary characteristics and critical ve-locity in the running process of the Long distance oil pipeline. Take Bohai X Oilfield oil transportation pipeline as an example, through the sand sedimentary characteristics of simula-tion experiment and the theory calculation of critical velocity, the characteristics of sand de-position in the sea pipe and the possibility of reducing the diameter of the pipe are confirmed. It is concluded that non uniform granular sand deposition and maximum critical velocity is 0.463 m/s, uniform sand particles deposition critical velocity is 2.39 m/s. The research shows that in the long running process of the submarine long oil pipeline,the sediment deposi-tion in the pipeline may cause the shrinkage of the pipeline. The research results can provide theoretical guidance for the detection and the integrity management of the submarine pipeline.%为了研究海底长输油管道运行过程中管道砂（泥）沉积特性及临界流速变化规律，以渤海某油田原油外输海管为例，通过砂（泥）沉积特性模拟实验及沉积临界流速理论计算，确认了海管内砂沉积特性及管道缩径的可能性，并得出非均匀颗粒砂沉积最大临界流速为0.463 m/s，均匀颗粒砂沉积临界流速为2.39 m/s。研究表明，海底长输油气管道在长期运行过程中，管线内泥砂沉积可能造成管线缩径，该研究结果可为海管内检测以及完整性管理提供理论指导。