[CCoE Notice] Thesis Defense: Saturation Dependent Dielectric Constant Measurements of Carbonates between 1 MHz and 300 MHz

[Grayson, Audrey A]

Master’s Thesis Defense

Saturation Dependent Dielectric Constant Measurements of Carbonates between 1 MHz and 300 MHz

Asanga Jayatilaka

Date: Friday, April 28, 2017

Location: Energy Research Center, Building 9, Room 124
Time: 2:00 pm – 4:00 pm

Committee Chair: Dr. Michael Myers

Committee Members:
Dr. Lori Hathon
Dr. Cumaraswamy Vipulanandan

The focus of the work is to develop an understanding of the relationship between the oil/water two-phase saturation of carbonates and the bulk dielectric constant. Previous dielectric models in research show that the dielectric constant is dependent on three mechanisms, the Helmholtz double layer, the Maxwell-Wagner effect, and the high frequency limit. This research isolates the Maxwell-Wagner term by studying clean, carbonate samples. The reflection coefficient was measured from the samples using an impedance analyzer and dielectric sample holder. Matlab programs were written to automate the data gathering process and calculate the dielectric constant from the reflection coefficient measurements using the short and open technique. It is concluded that the Maxwell-Wagner term of the dielectric constant models in previous research is affected by the brine saturation of the sample as results from the experiments show that the dielectric constant normalized to frequency scales with the brine filled porosity.
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