Method and apparatus for conducting electromagnetic exploration

Details Method and apparatus for conducting electromagnetic exploration Method and apparatus for conducting electromagnetic exploration

G - Physics

01

V

G01V 3/165 (2006.01) G01V 3/10 (2006.01)

Patent

CA 2626195

The invention concerns a method and apparatus (10) for conducting electromagnetic exploration of the earth's surface. At least one primary coil (12) is provided. The primary coil(s) is or are powered to generate a primary electromagnetic field and the earth's surface is exposed to this primary field. A receiver is provided to detect a secondary field generated by the earth as a result of currents generated therein by the primary field. Spaced apart nulling coils (14) are powered in such a manner as to null the primary field in a three-dimensional volume surrounding the receiver, thereby enabling the receiver to detect the secondary field vectorially.

La présente invention a trait à un procédé et un appareil (20) pour la réalisation d'exploration électromagnétique de la surface terrestre. Au moins un enroulement primaire (12) est prévu. L'enroulement/les enroulements primaire(s) est/sont alimenté(s) pour la génération d'un champ électromagnétique primaire et la surface terrestre est exposée à ce champ primaire. Un récepteur est prévu pour la détection d'un champ secondaire généré par la terre suite aux courants qui y sont générés par le champ primaire. Des enroulements d'annulation espacées (14) sont alimentés de manière à annuler le courant primaire dans un volume tridimensionnel entourant le récepteur, permettant ainsi la détection vectorielle du courant secondaire par le récepteur.

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