海底管道沙粒侵蚀的机理、特性及分析模型

项目名称： 海底管道沙粒侵蚀的机理、特性及分析模型

项目编号： No.51279129

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 水利工程

项目作者： 刘海笑

作者单位： 天津大学

项目金额： 80万元

中文摘要： 南海深水油气的输送具有低温、高压以及油质含硫量低等特点，沙粒侵蚀将是导致海底管道内部损伤的主要原因。国际上已有的沙粒侵蚀分析模型未能反映沙粒侵蚀破坏的机理及完整过程，这些经验或半经验模型均存在一定的适用范围。本项目以模型实验为基础，探究海底管道沙粒侵蚀的机理和特性，研究单相紊流流场中沙粒运动规律、多相流管道中沙粒运动规律和大规模沙粒撞击管壁的整体损伤效应，并以沙粒概率运动模型为基础建立起管道沙粒侵蚀分析模型。与国际上同类研究相比，本研究在紊流沙粒概率运动模型、多相流沙粒侵蚀模型以及管道最大侵蚀部位精确预测等方面具有显著特色。流动保障是海洋油气开发和利用的关键技术，作为流动保障的重要课题，管道沙粒侵蚀研究在国内仍处于空白或起步阶段，全面开展该研究对于提升国内的流动保障水平以至推动我国海洋工程技术的自主研发，具有重要而深远的意义。

中文关键词： 流动保障；管道；概率分析；颗粒侵蚀；环状流

英文摘要： Due to several features of the transportation of deepwater hydrocarbon reserves in the South China Sea, such as cold temperature, high pressure and low levels of sulfide, the sand erosion becomes the predominant factor that causes the internal damage of subsea pipelines. The existing erosion models are all empirical or semi-empirical ones, which cannot be broadly accepted for prcdicting the erosion results. Furthermore, the mechanism and the whole process of sand erosion are not correctly reflected in these models. Based on model experimental study, the present project aims at exploring the mechanism and property of sand erosion of subsea pipelines. Three main contents will be studied, i.e., the random motion behavior of solid particle in the single-phase turbulence flow field, the motion behavior of solid particle in the multiphase-flow pipeline, and the cumulative erosion due to the impacts of massive particles. A new erosion model for subsea pipelines will be proposed based on the probabilistic motion model for soild particle. The researches described in the project are distinguished from the existing erosion models in three features, including the random motion of soild particle resulting from turbulence, the sand erosion model in different multiphase patterns, and the accurate prediction of the erosion prof

英文关键词： Flow assurance；Pipeline；Probability analysis；Particle erosion；Annular flow