Patent ID: 8805632
Filing Date: 2014-08-12
Classification: G01V

Abstract:
1. A method of estimating a property of an earth formation, comprising: disposing a carrier in a borehole in the earth formation, the carrier including one of a receiver assembly and a source assembly, the receiver assembly including a receiver clock and the source assembly including a source clock; transmitting an electromagnetic (EM) signal through the earth formation from an EM source in the source assembly at a pre-selected transmission time, the transmission time being identified based on the source clock; detecting the electromagnetic signal via an EM detector in the receiver assembly; identifying a receipt time of the detected electromagnetic signal using the receiver clock; adjusting the receiver clock by comparing the transmission time to the receipt time to synchronize the receiver clock to the source clock; emittng a seismic signal into the earth formation from a seismic source in the source assembly; detecting the seismic signal by at least one seismic receiver disposed in the receiver assembly; and estimating at least one property of the formation based on the detected seismic signal.