| US 7,592,814 B2 | ||
| Method for monitoring an area containing a subterranean resistive or conductive body, and for obtaining a volume of hydrocarbon therefrom | ||
| David Andreis, Aberdeen (United Kingdom) | ||
| Assigned to OHM Limited, Aberdeen (United Kingdom) | ||
| Filed on Mar. 10, 2008, as Appl. No. 12/45,490. | ||
| Application 12/045490 is a continuation of application No. 11/353408, filed on Feb. 14, 2006, granted, now 7,362,102. | ||
| Claims priority of application No. 0503627.2 (GB), filed on Feb. 22, 2005. | ||
| Prior Publication US 2008/0150538 A1, Jun. 26, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G01V 3/02 (2006.01) | ||
| U.S. Cl. 324—365 [324/357] | 14 Claims |
| 14. A volume of hydrocarbon obtained from an area that contains a subterranean hydrocarbon reservoir, the hydrocarbon obtained
by:
penetrating the subterranean hydrocarbon reservoir with a hydrocarbon-producing well;
extracting hydrocarbon from the subterranean hydrocarbon reservoir using the hydrocarbon-producing well;
providing at least one horizontal electric dipole transmitter and at least one receiver for obtaining electric or magnetic
field data at different times;
measuring horizontal gradients in a first component of the electric or magnetic field data along a first direction at the
different times; and
measuring horizontal gradients in a second component of the electric or magnetic field data along a second direction at the
different times; and
continuing to extract hydrocarbon from the hydrocarbon-producing well as the measured gradients at different times are used
to monitor depletion of the reservoir.
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