Electromagnetic prospecting system, receiving system for an electromagnetic prospecting system and method to collect data in a system of prospecting.

摘要

Electromagnetic prospecting system, receiving system for an electromagnetic prospecting system and method to collect data in a system of electromagnetic prospecting. A receiver system (18) for a system of electromagnetic prospecting is disclosed.The system comprises a transmitter for transmitting electromagnetic prospecting a primary electromagnetic field so as to generate a secondary electromagnetic field from a field that is being surveyed, the electromagnetic field having a profile of secondary field temp The deterioration, transient.The receiver system (18) includes first and second sensors (20, 22) to detect the secondary electromagnetic field, and the second sensor (22) is less sensitive than the first sensor (20) so as to detect the secondary electromagnetic field during a first period of time.With the first sensor (20) being used to detect the secondary electromagnetic field after the first period of time. Typically, each sensor (20, 22) comprises three orthogonal magnetometers squid, with the second sensor (22) being approximately 10 times less sensitive than the first sensor (20)