METHOD AND SYSTEM FOR EVALUATING THE CHARACTERISTIC PROPERTIES OF TWO CONTACTING MEDIA AND OF THE INTERFACE BETWEEN THEM BASED ON MIXED SURFACE WAVES PROPAGATING ALONG THE INTERFACE

摘要

The invention relates to the methods for evaluating the characteristic properties of at least one of two contacting media such as a subsurface formation surrounding a borehole and the borehole, and the system for evaluating the properties. The method is based on mixed surface waveforms measurement and analysis. The method for evaluating characteristic properties comprises registering acoustic signals generated by passage of acoustic waves in said media and determining one or more wave characteristics of mixed surface waves propagating along said interface based on the registered acoustic signals. The characteristic properties of at least one of said media and said interface are calculated on the basis of determined wave characteristics of mixed surface waves.