Title: Electromagnetic survey system with multiple sources
Application Number: 200610144439 Application Date: 2006.09.30
Publication Number: 1945359 Publication Date: 2007.04.11
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01V3/08;G01V3/00
Applicant(s) Name: Schlumberger Technology BV Address:
Inventor(s) Name: Redding Ransom;Heelan Philip
Attorney & Agent: lijing lan zhangzhi cheng
Abstract:
    Multiple sources are provided for a transmitter cable for use in electromagnetic surveying. The transmitter cable includes a dipole antenna comprising a pair of spaced apart electrodes mounted on their respective cables. Two antennas may be powered from each source. Alternatively, the outputs of each source are connected to a common antenna pair. A single large power supply may be mounted on a vessel to supply power through the tow cable. Alternatively, a number of power supplies may be provided aboard the vessel, with each power supply having dedicated conductors through the tow cable to power the plurality of current sources.
Time: 5