Simultaneous Measurement of Capillary Pressure and Dieffectric Constant in Porous Media
An experimental tool is presented with which the capillary pressure (Pc) and the dielectric constant (ε) of a porous medium are measured simultaneously. The equipment is designed to conduct measurements for the unconsolidated sand-distilled water-gas (CO2) system for pressures up to 20 bar and constant temperature conditions. The bulk phase pressures of the gas and the water are measured at the top and bottom of the sample holder and we define the Pc as the averaged pressure difference. The sample holder is a parallel plate capacitor with stainless steel plates, which also serve as support for the sample. The plates are kept separated by a plastic ring. A precision component analyzer is connected to the sample holder and measures the impedance as a function of frequency (f). The total impedance is directly related to the effective value of the complex permittivity. The aim of this paper is to describe the details and the calibration of the tool. The accuracy and the validity of both (Sω) and Pc(Sω) are determined from reproducible data. Results are shown for a full capillary pressure cycle of drainage and imbibition at f=3 MHz.
W. J. Plug L. M. Moreno J. Bruining E. C. Slob
Delft University of Technology, The Netherlands
国际会议
Progress in Electromagnetics Research Symposium 2007(2007年电磁学研究新进展学术研讨会)(PIERS 2007)
北京
英文
1671-1675
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）