Acquisition system and method for towed electromagnetic sensor cable and source

摘要

An electromagnetic survey acquisition system includes a sensor cable and a source cable, each deployable in a body of water, and a recording system. The sensor cable includes an electromagnetic sensor thereon. The source cable includes an electromagnetic antenna thereon. The recording system includes a source current generator, a current sensor, and an acquisition controller. The source current generator powers the source cable to emit an electromagnetic field from the antenna. The current sensor is coupled to the source current generator. The acquisition controller interrogates the electromagnetic sensor and the current sensor at selected times in a synchronized fashion.

主权项

1. An acquisition system, comprising:
at least one sensor cable deployable in a body of water, the at least one sensor cable including at least one electromagnetic sensor thereon; a first source cable deployable in the body of water, the first source cable including an electromagnetic antenna thereon; and a recording system comprising: a first source current generator in power communication with the first source cable, configured to emit an electromagnetic field from the electromagnetic antenna at selected times; at least one current sensor coupled to an output of the first source current generator; and an acquisition controller configured to interrogate the at least one electromagnetic sensor and the at least one current sensor at selected times; wherein the interrogation of the at least one electromagnetic sensor and the interrogation of the at least one current sensor are synchronized.