System and method for hydrocarbon reservoir monitoring using controlled-source electromagnetic fields

The Regents Of The University Of California, 5th Floor, 1111 Franklin Street, CA94607-5200, OAKLAND, US

Steven C Constable, 5295 Bothe Avenue, CA92122-401 SAN DIEGO, US

Bryn Aarflot AS, PO Box 449 City Center, 0104 OSLO, NO (71) Applicant (72) Inventor (74) Representative (54) Designation System and method for hydrocarbon reservoir monitoring using electromagnetic fats from controlled sources.

(57) Summary

Equipment and method for real-time monitoring of a hydrocarbon reservoir (4) during recovery, comprising an electromagnetic source assembly (16) for emitting multiple electromagnetic fields. Several antennas (30a-30d) on the sea floor are distributed over an area of ​​the sea floor (8) corresponding to the reservoir (4), whereby each such antenna (30a-30d) comprises a receiver electrode array (30a-30d) which is adapted for reception of a second plurality of electromagnetic fields and generating signals corresponding to the detected fields. A data logging processor receives the signals over time and stores data corresponding to the signals. Different combinations of receiver electrodes are used in combination with transmitter antennas to measure vertical, radial and / or azimuthal fields. Transmission and detection of these fields can be performed continuously or over certain time intervals during hydrocarbon recovery, thereby estimating the recovery rate and efficiency of the recovery.

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