Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-refraction type
Reexamination Certificate
2009-05-04
2011-12-13
Lobo, Ian (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-refraction type
C367S025000, C367S057000, C702S011000
Reexamination Certificate
active
08077546
ABSTRACT:
A method for monitoring a multi-layered system below a surface comprising a slow layer and a fast layer; the method comprising: transmitting one or more seismic waves from one or more seismic sources through the multi-layered system; receiving signals emanating from the multi-layered system in response to the one or more seismic waves with one or more receivers located a distance from the one or more seismic sources; identifying one or more critically refracted compressional (CRC) waves amongst the signals; and inferring information about a change in the slow layer based on the one or more CRC waves; wherein the CRC wave is a refracted wave which has traveled along an interface between the fast layer and an adjacent layer.
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Hansteen Fredrik
Wills Peter Berkeley
Lobo Ian
Shell Oil Company
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