一种永置式石油生产地面多井组单井轮巡三相流监测装置及应用研究

Research on the use of a permanent multi-well group single-well patrol three-phase flow multi-parameter measuring device for oil production

为了解决传统石油开发集中计量方式难以获取单口油井油气水三相流相关参数的难题,采用流体体积和有限元分析等方法在建立该测量装置的数值仿真模型基础上对其结构参数、气液分离效果等进行了深入研究与优化,从而确定了该监测装置的最优结构参数,并研制了可以在现有集中计量环境中长期、稳定与可靠使用的一种永置式石油生产多井组单井轮巡三相流监测装置。另外,还在搭建的永置式石油生产地面多井组单井轮巡三相流多参数监测平台上开展了实验研究,实验结果表明,所研制的装置在气、液相流量5~70 m~3/d,液相持水率50%~90%等混合流体下持水率、气量测量误差均小于10%,流量测量误差小于4%。仿真和实验均证明了永置式监测装置具有良好的多分相测量性能。

The traditional centralized metering method for oil development is difficult to get the parameters linked to the oil-gas-water three-phase flow in a single oil well.To address this issue,the volume of fluid and finite element analysis are used in this study to optimize the structural parameters and impacts of the gas-liquid separation on the basis of the numerical simulation model of the measuring device.Therefore,the optimal structural parameters of the monitoring device are determined.Based on the afore-mentioned research,a permanent multi-well group single-well patrol three-phase flow multi-parameter measuring device is developed for long-term,stable and reliable utilization in the existing centralized metering environment.In addition,the experimental studies are conducted on a permanent multi-well group single-well patrol three-phase flow multi-parameter measuring platform built for oil production.The experimental results show that the developed device has less than 10%error in water holdup and gas holdup measurement and less than 4%error in flow rate measurement under mixed fluids such as gas and liquid phase flow rate range(5~70 m~3/d)and liquid phase water holdup range(50%~90%).Both simulations and experiments demonstrate that measuring device performs well in water holdup measurement.