Long Offset Transient Electromagnetic (LOTEM) for monitoring fluid injection in petroleum reservoirs – Preliminar results of Fazenda Alvorada Field (Brazil)

This work presents the preliminary results obtained using LOTEM (“Long Offset Transient Electromagnetic”) method in a producing petroleum field in Northeast Region of Brazil (Bahia State). The main goal of the study is to produce subsurface images for monitoring fluid injection after EOR (Enhanced Oil Recovery) operations. Five stations were selected, and, a careful processing was applied in all of them to remove noisy data. A preliminary one-dimensional (1D) interpretation was done using forward models, where it was possible to observe oil/injected water contacts.