Sensitivity analysis of electromagnetic stimulation of oil wells using simulation technique and Box-Behnken design

This research aims to investigate the parameters affecting the electromagnetic (EM) stimulation of an oil well. To this end, a simulator and Box-Behnken design were implemented to determine the sensitivity of EM stimulation with respect to rock and fluid properties. Seven factors of the frequency, brine water salinity, water saturation, oil dielectric constant, rock dielectric constant, porosity, and initial temperature were analyzed through 62 simulation runs. The dielectric constants of brine water were obtained using the Stogryn model as a function of brine salinity, frequency, and initial temperature. Based on the distance far from the wellbore, the wellbore region was divided into four sections: 5-6,6-10,10-20, and 20-100 cm. The most affecting parameter in the domain of 5-20 cm is brine salinity. The frequency and water saturation were obtained as the next affecting parameters, respectively. The most affecting parameter in the section of 20-100 cm is the frequency. In the section of 20-10 cm, the second and third affecting parameters were found to be brine water salinity and water saturation, respectively. The highest power loss density in the 5-6 cm section was obtained as 4300 Watt/m(3) while the highest density was almost 1 Watt/m(3) in the section of 20-100 cm. (C) 2022 Sharif University of Technology. All rights reserved.