Patent ID: 9310505
Filing Date: 2016-04-12
CPC Classification: G01V

Claim Text:
1. A method of calibrating a seismic velocity model to characterize a subterranean region between a first well and a second well, comprising: providing a seismic velocity model; deploying a source in a first well and a seismic receiver in a second well at a known first location to detect a seismic event caused by the source, the seismic receiver having a downhole clock; providing a surface system having at least one surface clock; synchronizing the downhole clock and the at least one surface clock to a common reference time frame; commanding the source to initiate the seismic event; determining an initiation time in reference time frame at which the source initiated the seismic event in the first well; communicating seismic data indicative of an arrival time in reference time frame at which the seismic receiver detected the seismic event in the second well; referencing the detected arrival time in reference time frame with a predicted arrival time generated by the seismic velocity model; and using the detected arrival time in reference time frame and the initiation time in reference time frame as a constraint to calibrate the seismic velocity model.