石油生产多组分监测光纤电导一体式传感器研究

Research on fiber-optic and conductance integrated sensor for multi-component monitoring in petroleum productions

为了解决石油生产多组分监测问题,基于光纤技术和电导技术成功研制了一种用于石油生产多组分监测光纤电导一体式传感器。利用ZEMA光线追迹方法和FEM方法建立FOCIS仿真模型。对电导测量模块(CMM)电场分布、CMM响应特性、光纤测量模块(OFMM)返回光照强度分布、OFMM响应特性等进行了仿真分析。不同油气水三相流流型条件下CMM和OFMM测量值与标准含率值呈现出良好的线性关系,测量相含率误差均在5%以内。在内径为32 mm垂直管道内进行了FOCIS现场实验测试,实验结果表明:在气流量5、20、40 m^(3)/d,油水总流量10、30、50、70 m^(3)/d,液相含水率50%、60%、70%、80%、90%等工况下,测量含水率与含气率误差在5%以内。仿真与实验均证明FOCIS油气水多组分监测是可行和有效的。

In order to solve the problem of multi-component monitoring in oil production,based on optical fiber technology and electrical conductance technology,successfully develops a fiber-optic and conductance integrated sensor for multi-component monitoring in petroleum production.FOCIS simulation model is established using ZEMAX ray tracing method and FEM method.The electric field distribution of the conductance measurement module(CMM),CMM response characteristics,the return light intensity distribution of optical fiber measurement module(OFMM)and OFMM response characteristics,etc.are simulated and analyzed.The measured values of CMM and OFMM show a good linear relationship with the standard rates of phase content under different oil-gas-water three-phase flow patterns,and the errors of the measured rates of phase content are all within 5%.The FOCIS on site experiment test was carried out in a vertical pipeline with an inner diameter of 32 mm.The experiment results show that under the working conditions where the gas flow rate is 5,20,40 m^(3)/d,the total oil and water flow rate is 10,30,50,70 m^(3)/d and the liquid phase water content is 50%,60%,70%,80%,90%,the errors of the measured rate of water content and rate of gas content are within 5%.Both simulations and experiments prove that the FOCIS multi-component monitoring of oil,gas and water is feasible and effective.