海底长输油管道缩径模拟实验及计算分析

摘要

为了研究海底长输油管道运行过程中管道内径、流体流通面积和输油能力变化规律.以渤海X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, 并根据实际温降、压降分析,确认了管内砂沉积及管道缩径的可能性.研究表明,海底长输油气管道在长期运行过程中,管线内泥沙沉积造成了管线缩径,原油流通面积减小,压降增大,输油能力不断下降.%In order to research of submarine pipeline operation in the process of fluid flow area and transportation capacity variation.To Bohai X oils likely lost sea pipe as an example, through the deposition properties of sand (mud) simulation experiment and critical deposition velocity theory calculation, and according to the actual temperature drop, IR drop analysis, confirmed the possibility of reduced diameter tube sand deposition and the pipeline.Research shows that: the seabed oil and gas pipeline in the long run, sediment deposition in the pipeline caused reduced diameter pipeline, crude oil flow area is reduced, increase the pressure drop, oil capacity of declining.