Estimating the Squirt-Flow Frequency

E-22 ESTIMATING THE SQUIRT-FLOW FREQUENCY Abstract 1 A range of models have been developed recently to describe the dynamic seismic response of fractured in-situ rock. These models require the specification of an unknown transition frequency. This frequency is in general different from the standard “squirt-flow frequency” which is understood from laboratory rock physics measurements. Recent theoretical work establishes a link between these two concepts. We show how to use published laboratory data to calibrate the fracture models. We note that our theoretical framework matches a range of laboratory observations and the inferred values of the squirt-flow frequency are consistent between