微波技术在三相相对渗透率曲线测试中的应用

An Application to Measure Three-phase Relative Permeability by Microwave Techniques

本文论述了微波衰减法测定圆柱状岩芯油、气、水三相饱和度的理论及其仪器构成。该仪器采用3厘米微波元器件组成微波测试系统,由单板微机对徽波衰减信号进行实时数据采集、处理和运算,完成三相饱和度的快速测定和显示。该仪器的测量误差小于±3％,已被用于油、气、水三相相对渗透率测试中。

In this paper, A theory and instrument for measuring three—phase saturations of oil, gas and water system in cores by microwave attenuation technique were discussed. Microwave measurement system is made up of X—and microwave devices and water content in core can be converted into D.C. signal. The signal collection, process and calculation are promptly made by single—board computer. Three—phase saturations can be rapidly detected and displayed. Measuring errors in saturation are ±3.0%. The instrument has been used for determining three—phase relative permeability in oil, gas and water system.