固控系统除砂器内部颗粒行为研究  

Particle Behaviors Inside Desander for Solid Control System

作　　者：吴寒 王晶 Wu Han;Wang Jing(Shanghai Branch,CNOOC EnerTech-Drilling&Production Co.;Shanghai Branch,CNOOC(China)Co.,Ltd.)

机构地区：[1]中海油能源发展股份有限公司上海工程技术分公司,上海市200335 [2]中海石油(中国)有限公司上海分公司

出　　处：《石油机械》2025年第4期40-47,55,共9页China Petroleum Machinery

基　　金：中国海洋石油有限公司重大科技专项“东海万米级大位移井钻完井关键技术研究与应用”(KJZX-2024-0103)。

摘　　要：深层、超深层油气田逐渐成为油气资源发展的新领域,需要一系列高压除砂设备来支持这些超深油气井的开采。为此,开展了高压固控系统除砂器内部颗粒行为研究。基于CFD数值模拟方法,并分别设置5个不同的颗粒入射点和3种不同粒径的颗粒,分析不同入射点下单颗粒与颗粒组的分离效果。研究结果表明:不同粒径的颗粒在不同入射点的轨迹存在差异;不同粒径的颗粒组在除砂器内部的分离行为不同,粒度较大的颗粒组在旋流筒的柱段和锥段沿着内壁流入底流口,少部分的颗粒在锥段进入溢流,粒度较小的颗粒组被带入内旋流,从而使颗粒随流体沿溢流口流出,分离效率低;旋流筒分离关键区为锥段,随着锥段沿径向减小,液相进入溢流区的同时携带部分颗粒上行,并在上行过程中发展为内旋流携带的颗粒。研究结论可为固控系统除砂器工艺参数的确定提供理论参考。Deep to ultradeep oil and gas reservoirs have become new targets for petroleum.Ultradeep oil and gas wells in these reservoirs require a series of high-pressure desanding devices.A research was conducted on the particle behaviors inside the desander for high-pressure solid control system.Through numerical simulation by computational fluid dynamics(CFD),and setting 5 particle incident points and 3 sizes of particles,the separation performance of particle(group)at different incident points was analyzed.The research results show that the particles with different sizes are different in trajectory at different incident points.The particle groups with different sizes reflect different separation behaviors inside the desander:the particle group with larger size flows into the underflow port along the inner wall of the cyclone cylinder in the column and cone sections,and a small portion of particles exhibit overflow in the cone section;the particle group smaller size is brought into inner vortex,allowing the particles to flow out along the overflow port with the fluid,thus resulting in low separation efficiency.The key separation zone of the cyclone cylinder is the cone section.As the cone section decreases in radial direction,the liquid phase enters the overflow zone while carrying some particles upward,and develops into particles carried by inner vortex during the upward process.The research conclusions provide theoretical reference for determining the parameters of desander for solid control systems.

关 键 词：超深油气井 除砂器 数值模型 分离特性 颗粒组行为 入射点 

分 类 号：TE926[石油与天然气工程—石油机械设备]