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 hit the target, the CST simulator and Box-Behnken were implemented to find the sensitivity of the EM stimulation regarding 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 by employing 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 of 5-6, 6-10, 10-20, and 20-100cm. The most affecting parameter in the domain of 5-20 cm is the 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 the 20-10cm, the second and third affecting parameters were found to be the brine water salinity and water saturation, respectively. The highest power loss density at the 5-6cm obtained 4300 watts/m3 while the highest density was almost 1 watt/m3 at the section of 20-100 cm.