Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Reexamination Certificate
2008-04-22
2008-04-22
Patidar, Jay M (Department: 2862)
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
C324S357000
Reexamination Certificate
active
07362102
ABSTRACT:
A method of analyzing electromagnetic survey data from an area of seafloor6that is thought or known to contain a resistive or conductive body, for example a subterranean hydrocarbon reservoir12, is described. The method includes providing horizontal electromagnetic field data obtained by at least one receiver125from at least one horizontal electric dipole transmitter22. Horizontal gradients in the electromagnetic field data are determined for a first component of the electromagnetic field data along a first direction and for a second component of the electromagnetic field data along a second direction. The first and second components can be the electric field along the first and second directions, or the magnetic field perpendicular to the first direction and second directions. The gradients are then combined to provide combined response data. Because the combined response data are relatively insensitive to the transverse electric (TE) mode component of the transmitted signal, the method allows hydrocarbon reservoirs to be detected in shallow water where the TE mode component interacting with the air would otherwise dominate.
REFERENCES:
patent: 4617518 (1986-10-01), Srnka
patent: 5770945 (1998-06-01), Constable
patent: 7002350 (2006-02-01), Barringer
patent: 2 382 875 (2003-06-01), None
patent: 2382875 (2003-06-01), None
patent: 2 385 923 (2003-09-01), None
patent: 2 390 904 (2004-01-01), None
patent: 2 402 745 (2004-12-01), None
patent: 2402745 (2004-12-01), None
patent: 2411006 (2005-08-01), None
patent: 02/14906 (2002-02-01), None
patent: 03/104844 (2003-12-01), None
patent: 2004/053528 (2004-06-01), None
patent: 05/010560 (2005-02-01), None
MacGregor, L. M. et al. “Use of marine controlled source electromagnetic sounding for sub-basalt exploration.”Geophysical Prospecting. 48 (2000): 1091-1106.
MacGregor, L.M. et al. “The RAMESSES experiment III: Controlled source electromagnetic sounding of the Reykjanes Ridge at 57° 45′ N.”Geophysical Journal International. 135 (1998): 773-789.
Eidesmo, T. et al. “Sea Bed Logging (SBL), a new method for remote and direct identification of hydrocarbon filled layers in deepwater areas.”First Break. 20.3 (2002): 144-152.
Ellingsrud, S. et al. “Remote sensing of hydrocarbon reservoirs by seabed logging (SBL): Results from a cruise offshore Angola.”The Leading Edge. 21 (2002): 972-982.
Chave, A. D. et al. “Controlled electromagnetic sources for measuring electrical conductivity beneath the oceans, 1. Forward problem and model study.”Journal of Geophysical Research. 87.B7 (1982): 5327-5338.
Constable, S.C. et al. “Marine magnetotellurics for petroleum exploration Part 1: A seafloor equipment system.”Geophysics. 63.3 (1998): 816-825.
OHM Limited
Patidar Jay M
Renner, Otto, Boisselle & Sklar, LLP.
LandOfFree
Electromagnetic surveying for resistive or conductive bodies does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electromagnetic surveying for resistive or conductive bodies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic surveying for resistive or conductive bodies will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2790431