Patent ID: 7567084
Filing Date: 2009-07-28
Classification: G01V

Abstract:
1. A method of producing a survey report of subterranean strata which comprises: deploying an electromagnetic (EM) field transmitter; deploying a seismic source at substantially the same location as the EM field transmitter; deploying an EM field receiver at a predetermined offset distance from the transmitter; deploying a seismic receiver at substantially the same location as the EM field receiver; applying an EM field to the strata using the EM field transmitter; detecting the EM wave field response using the EM field receiver; applying a seismic event to the strata using the seismic source at substantially the same location as the EM field transmitter; detecting the seismic response using the seismic receiver at substantially the same location as the EM field receiver; analyzing the EM wave field response; analyzing the seismic response; reconciling the two responses, in order to produce a report on the presence and nature of the strata; identifying the refracted wave component of the EM wave field response; identifying the refracted wave component of the seismic response; and using the two refracted wave components to produce the survey report.