摘要
为研究油气井流入控制器(ICD)完井技术,针对混合型ICD压降控制模型不完善的问题,进行了压降控制特征的分析研究,利用CFD软件开展流场流速和压力分布计算模拟,分析了流体流量、流体黏度和装置几何参数对节流-摩擦混合型ICD压降的影响。特别对比了摩擦型ICD与节流-摩擦混合型ICD在相似工况下流体不同黏度时的压降计算数据。分析结果表明:流体在节流-摩擦混合型ICD孔口处压力瞬时降低,流动时压力损失小,以节流压降为主;进入节流-摩擦混合型ICD后流速逐渐增大,在孔口处达到峰值,从孔口流出后,流速又迅速降低,在隔板流道中重新分布;流体流量是压降的主要影响因素,流体黏度是次要影响因素,隔板间距对压降的影响最小,可以忽略不计;与摩擦型ICD相比,节流-摩擦混合型ICD对流体黏度敏感性差,流体黏度差值一定的情况下,节流-摩擦混合型ICD产生的压降远低于摩擦型ICD产生的压降。研究结果可以为ICD完井工具的设计和现场应用提供参考。
To study Inflow Control Device( ICD) completion technology,the CFD software is used to analyze the velocity and pressure distribution of the flow field. The effects of flow rate,fluid viscosity,device geometry parameters on the pressure drop of the orifice-friction hybrid ICD are analyzed. In particular,the calculated pressure drop of the friction type ICD and the orifice-friction hybrid ICD under different working conditions are compared.The results of CFD analysis show that the pressure of the fluid is instantaneously reduced at the orifice of the orifice-friction hybrid ICD. The pressure loss during flow is small,and the orifice pressure drop is dominant. After entering the orifice-friction hybrid ICD,the flow velocity of the fluid gradually increases and peaks at the orifice. Flowing out of the orifice,the flow rate of the fluid decreases rapidly and redistributes in the plate separated flow path.The fluid flow rate is the main influencing factor of the pressure drop,followed by the fluid viscosity. The plate spacing has the lowest influence on the pressure drop that can be ignored. Compared with the friction type ICD,the orifice-friction hybrid ICD has poor sensitivity to fluid viscosity. Therefore,given the fluid viscosity difference,the pressure drop generated by the orifice-friction hybrid ICD is much lower than that of the friction type ICD. The study can provide references for the design and application of ICD completion tools.
作者
付利
申瑞臣
韩自立
郑李
Fu Li;Shen Ruichen;Han Zili;Zheng Li(CNPC Engineering Technology R&D Company Limited;Oil and Gas Drilling Technology National Engineering Laboratory;CNPC Bohai Drilling Engineering Company Limited)
出处
《石油机械》
北大核心
2019年第8期126-131,共6页
China Petroleum Machinery
基金
中国石油集团工程技术研究院有限公司科学研究与技术开发课题“SAGD流入/流出控制器前期基础研究”(DRJ201511)
