Surface-to-Borehole CSEM for Waterflood Monitoring: 3D Inversion Strategies
G. McNeice and D. Colombo
Event name: 81st EAGE Conference and Exhibition 2019 Workshop Programme
Session: WS11 Reservoir Characterization and Monitoring from Inversion and Joint Inversion of Seismic and Non-seismic Methods
Publication date: 03 June 2019
Info: Extended abstract, PDF ( 540.62Kb )
Price: € 20
A 3D surface-to-borehole CSEM survey was acquired in a research well located in a producing oil field to monitor the movement of the waterfront. Variations in the data acquired in the initial baseline survey showed excellent spatial correlation with resistivity variations predicted through reservoir simulation. A 3D finite difference model of the anisotropic overburden and wellbore casing is used to invert for the resistivity of the reservoir surrounding the well. Comparison to borehole observations suggest the CSEM survey robustly recovers the reservoir resistivity distribution within 1.5 km of the well.