Power converter and electrode combinations for electromagnetic survey source

摘要

A marine electromagnetic survey source includes a power cable configured to couple to a high voltage power supply at one axial end and to a head unit at the other axial end. The head unit includes equipment configured to output a lower voltage at higher current than the current imparted thereto by high voltage power supply. The head unit has an electrically conductive exterior coupled to one output terminal of the equipment. An electromagnetic antenna cable having an electrode thereon is coupled to the head unit and configured to receive the output of another terminal of the head unit equipment. In some implementations, electromagnetic fields are induced in formations by conducting current to the equipment. Marine geophysical surveys are conducted utilizing such induction of electromagnetic fields.

主权项

1. A marine electromagnetic survey source comprising:
a power cable configured to couple to a high voltage power supply at one axial end and to a head unit at the other axial end, wherein;
the head unit comprises equipment configured to output a lower voltage at higher current than the high voltage power supply, wherein at least a portion of the head unit's exterior is electrically conductive and coupled to one output terminal of the equipment; and an electromagnetic antenna cable coupled to the head unit and configured to receive the output of another terminal of the equipment, wherein the antenna cable has an electrode thereon.