Source for electromagnetic surveying

申请公布号：GB201101576(D0)

申请号：GB20110001576

申请日期：2011.01.28

申请公布日期：2011.03.16

申请人：

ELECTROMAGNETIC GEOSERVICES ASA

摘要：A submersible high current PWM-based source system for marine electromagnetic surveying for hydrocarbon exploration. The system converts a periodic, arbitrary digital signal to a high output current in a HED optimized for maximum dipole moment, using PWM modulation and real-time current regulation for precise output amplitude. The design and choice of components allows a wideband EM signal to be generated with sharp transition characteristics and substantially independent of the AC input power characteristics. This in turn enables for improved tailoring of an EM source signal for a specific subterranean prospect, and thus increased accuracy of the EM data.

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