含砂水合物浆液过节流装置数值模拟研究  

Numerical Simulation of Hydrate Slurry With Sand Particles Through a Throttling Device

作　　者：李雪童 史博会[1] 段旭 刘浩田 王君傲 姚海元 宫敬[1] LI Xue-Tong;SHI Bo-Hui;DUAN Xu;LIU Hao-Tian;WANG Jun-Ao;YAO Hai-Yuan;GONG Jing(State Key Laboratory of Natural Gas Hydrate/National Engineering Laboratory for Pipeline Safety/MOE Key Laboratory of Petroleum Engineering/Beijing Key Laboratory of Urban Oil and Gas Distribution Technology,China University of Petroleum-Beijing 102249,China;CNOOC Research Institute Technology R&D Center,Beijing 100028,China)

机构地区：[1]天然气水合物国家重点实验室中国石油大学(北京)分室/油气管道输送安全国家工程实验室中国石油大学(北京)分室/石油工程教育部重点实验室/城市油气输配技术北京市重点实验室,北京102249 [2]中海油研究总院有限责任公司技术研发中心,北京100028

出　　处：《工程热物理学报》2022年第4期989-996,共8页Journal of Engineering Thermophysics

基　　金：国家自然基金面上项目(No.51874323);国家自然科学基金集成重大项目(No.U20B6005);国家自然基金青年项目(No.52104069);北京市自然科学基金资助项目(No.3192027);国家重点研发计划(No.2016YFC0303704);111引智计划(No.B18054);中国石油大学(北京)科研基金资助项目(No.2462020YXZZ045,No.2462020XKBH012)。

摘　　要：气体水合物颗粒在油气开发、可燃冰开发的输送系统中形成后,若与从矿藏携带的砂粒在管路中一起流动,易于发生复杂的固相颗粒沉积问题,会严重影响安全生产。本文将计算流体力学和离散单元法相结合(CFD-DEM),分别应用FLUENT和EDEM软件,模拟了含砂水合物浆液通过弯管中节流装置的颗粒流动特性和堵塞规律。研究结果表明,随着体系中含砂量和砂粒径的增大、节流装置孔口径的减小,浆液流动的稳定性下降,在节流装置前颗粒的堆积更显著;随着入口流速的增加,流动的能耗虽会增加,但颗粒在节流装置前的堆积会显著下降。结论认为降低管路输送系统内砂粒的携带量和砂粒径,避免管路内出现较严重的节流,以较高的流速运行,有助于保障含砂水合物浆液的流动安全。After gas hydrate particles are formed in the transportation system of oil and gas development or combustible ice development,if they flow together with the sand particles carried by the fluid from the mineral deposit in the pipeline,the complex solid particle deposition problem is prone to occur,which will be a serious threatening for the safe production.This paper combines the computational fluid dynamics method and the discrete element method(CFD-DEM)by using FLUENT and EDEM to simulate the particle flow characteristics and blockage phenomena of the hydrate slurry combined with sand particles through a throttle device in a bend structure tube.The research results show that with the increase of the sand fraction and sand particle size in the system and the decrease of the orifice diameter of the throttling device,the stability of the slurry flow will reduction and the accumulation of particles in front of the throttling device is more significant;with the increase of the inlet velocity,the energy consumption of the flow will increase,but the accumulation of particles in front of the throttling device will decrease significantly.The conclusion is that reducing the amount of sand carried and the sand size in the transportation system,avoiding serious throttling in the tube,and running at a higher flow rate will help ensure the flow safety of the hydrate slurry combined with sand particles.

关 键 词：水合物 砂 颗粒 CFD-DEM 数值模拟 

分 类 号：TE38[石油与天然气工程—油气田开发工程]