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. A method for electromagnetic surveying, comprising:
inducing an electromagnetic field in a body of water with a source current; detecting a property of the source current at selected times with a current sensor; detecting a property of an electromagnetic field in the body of water at selected time with an electromagnetic sensor; and synchronizing the detecting the property of the source current with the detecting the property of the electromagnetic field.