相关式油井液相计量系统研究与设计

Research and Design of Oil Well Liquid Phase Correlation Metering System

针对现有油井计量方式自动化程度低,误差较大等问题,利用同轴线相位法含水率计设计了一种相关式油井液相计量系统,该系统以同轴线相位法含水率计为传感器构建了相关流量计,基于互相关法建立了计量模型,实现了流量与含水率的同步测量。通过对不同情况下上、下游含水率计信号的分析可知,两路信号之间具有相关性,满足相关流量计的使用条件。该系统在现场试验的测量结果与涡轮流量计相比,平均误差为11.36%。试验结果证明了相关式油井液相计量系统在实际应用中的可行性。

Aiming at the problems of low automation and large error of existing oil well measurement methods,an oil well liquid phase correlation metering system was designed by using coaxial line phase method water content meter.In order to realize the synchronous measurement of both flow rate and water content,the correlation flowmeter was constructed by the coaxial line phase method water content meter.Moreover,the measurement model was established by cross-correlation method.Through the analysis of the upstream and downstream water content meter signals under different circumstances,it can be seen that there is a correlation between the two signals,to meet the conditions for the use of the correlation flowmeter.Compared with the turbine flowmeter in field tests,the average error of the system was 11.36%.The results proved the feasibility of the system in practical applications.