The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 2010
Filed:
Jan. 09, 2006
Svein Erling Johnstad, Bønes, NO;
Brian Anthony Farrelly, Rådal, NO;
Svein Erling Johnstad, Bønes, NO;
Brian Anthony Farrelly, Rådal, NO;
Norsk Hydro ASA, Oslo, NO;
Abstract
A method for determining electrical properties of a submarine petroleum fluid-bearing formation () under overburden geological layers () of thickness (s) under a seafloor () of a sea. The method includes: *arranging one or more transmitter antennas () in the sea, and arranging one or more electromagnetic receivers () in the sea, *the sea having a shallow sea depth (d) of 50-350 meters; *using the transmitter antenna () transmitting electromagnetic signals () of one or more pulses () having frequency of very low frequency between 0.01 Hz and 0.10 Hz; *using the receiver antennas () having an offset from the transmitter (), for receiving propagated electro-magnetic signals () due to the emitted electromagnetic signals (); *analyzing one or more components of the received signals () from receivers () having offsets between about 1 km and 12 km, whether the signals () differ significantly from a corresponding signal that would occur from a water-bearing formation (), indicating a petroleum fluid-bearing formation ().