海底长输油管道缩径模拟实验及计算分析

Simulation Experiment and Calculation Analysis of Submarine Long-distance Oil Pipeline

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 tempera-ture drop, IR drop analysis, confirmed the possibility of reduced diameter tube sand deposition and the pipeline. Re-search shows that ： the seabed oil and gas pipeline in the long run, sediment deposition in the pipeline caused re-duced diameter pipeline, crude oil flow area is reduced, increase the pressure drop, oil capacity of declining.