High Salinity Permittivity Models for Water Cut Sensing

In high salinity water cut measurements, it is observed that the measurement breaks down as a result of the conductivity signal swamping the capacitive signal. An accurate parameterizable model of high salinity permittivity is required for the development of downhole high salinity water cut meters that will operate in reservoir brine conditions in the 100 000 ppm to 200 000 ppm range. Theoretical models proposed by Stogryn Meissner and Wentz, and Somaraju and Trumpf are compared against high salinity data obtained by Peynman An effective temperature correction accounting for the influence of salinity-induced viscosity variations on permittivity is devised. This improves the fit to the real component of permittivity within the salinity range of interest: the Meissner and Wentz model provides the best fit. Subsequently, additional mechanisms need to be considered to account for the global mismatch between theory and experiment.

[1]  David E. Kranbuehl,et al.  Ion mobility time-of-flight measurements: isolating the mobility of charge carriers during an epoxy–amine reaction , 2004 .

[2]  Taha M. Okasha,et al.  Effect of Brine Salinity on Interfacial Tension in Arab-D Carbonate Reservoir, Saudi Arabia , 2009 .

[3]  Tomasz Dyakowski,et al.  Measurements of oil-water separation dynamics in primary separation systems using distributed capacitance sensors , 2005 .

[4]  J. D. Bernal,et al.  A Theory of Water and Ionic Solution, with Particular Reference to Hydrogen and Hydroxyl Ions , 1933 .

[5]  Hazim H. Abass,et al.  Wellbore Instability of Shale Formation; Zuluf Field, Saudi Arabia , 2006 .

[6]  C. Gabriel,et al.  Complex permittivity of sodium chloride solutions at microwave frequencies , 2007, Bioelectromagnetics.

[7]  Baker Atlas,et al.  THE EFFECTS OF SALT TYPE AND SALINITY ON FORMATION WATER VISCOSITY AND NMR RESPONSES , 2005 .

[8]  Jan W. Hopmans,et al.  Frequency, electrical conductivity and temperature analysis of a low-cost capacitance soil moisture sensor , 2008 .

[9]  Thomas Meissner,et al.  The complex dielectric constant of pure and sea water from microwave satellite observations , 2004, IEEE Transactions on Geoscience and Remote Sensing.

[10]  P. Mantas,et al.  Dielectric response of materials: extension to the Debye model , 1999 .

[11]  Kevin Lavelle,et al.  Useful criteria for selecting a watercut monitor , 2006 .

[12]  Tim J. Hewison,et al.  A comparison of ocean emissivity models using the Advanced Microwave Sounding Unit, the Special Sensor Microwave Imager, the TRMM Microwave Imager, and airborne radiometer observations , 2003 .

[13]  J. Trumpf,et al.  Frequency, Temperature and Salinity Variation of the Permittivity of Seawater , 2006, IEEE Transactions on Antennas and Propagation.