流体电容仪新的测量模型

本文针对油田生产测井中应用很广泛的流体电容含水率计在理论上和实验上进行了详细的研究。根据现有的实验事实，提出了高含水测量模。该模型认为，对于油水泡状流，即使在水矿化度很高时，流体电容仪仍在０－１００％的含水率范围内有油水分辨能力。

A New Measurement Model for Fluid Capacitance Water Cut Meter

The Fluid Capacitance Tool,which is widely used to determine the waterfraction in oil-water two phase flows in production wells,is studied theoretically and exper-imentally. Based on the fact that the formation water in wells and tap water used for calibra-tion on surface are good conductors in low frequency range,a new measurement model forwater continuous case is proposed.The model believes that the capacitance tool is able todistinguish between water and oil in the range of water cut from 0 to 100 percent.When oilis the continuous phase,the tool response indicates the volumetric fraction of water withinthe transducer,However,when water is the continuous phase,the tool response indicatestheratio of oncovered area to the whole area of the surface of the inside electrode.There-fore,the tool only responds to the oil droplets that are in contact with the inside electrodeand has very little response to the oil droplets that are not in contact with the inside elec-trode. The dynamic experiment in flow loop is also carried out.The result agrees with thetheory very satisfactorily.