Patent ID: 9239396
Filing Date: 2016-01-19
CPC Classification: E21B,G01V

Claim Text:
1. A method for monitoring a drilling operation in a subterranean formation, wherein the drilling operation is performed using a drill bit on a drillstring, and wherein the drilling operation generates one or more seismic signals and one or more electromagnetic signals, further wherein the one or more electromagnetic signals are caused by electroseismic or seismoelectric conversion of the one or more seismic signals, the method comprising: receiving, from a first sensor array, the one or more seismic signals caused by the drilling operation in the subterranean formation; receiving, from the first sensor array, the one or more electromagnetic signals generated by the drilling operation in the subterranean formation; determining a property of one or more of the drillstring and the subterranean formation based, at least in part, on the seismic signals and the corresponding electromagnetic signals received from the first sensor array; and wherein the first sensor array is arranged to monitor the drilling operation.