Abstract
Summary This paper presents preliminary results from experimental research concerning the ultrasonic reflectivity of rock samples. The goal is to determine whether meaningful petrophysical properties can be obtained through the analysis of reflected acoustic signals of the type produced with the new generation of ultrasonic borehole televiewers. Present emphasis is on analysis of the full-reflected waveform. Time-domain samples of the transmitted and reflected signals are transformed into the frequency domain by means of digital Fourier methods to determine the complex reflection coefficient of the rock. A simplified viscoelastic wave-propagation model converts the reflection coefficient estimates into wave velocity estimates. Sound speed estimates in reasonable agreement with those determined by use of standard experimental techniques have been obtained for a variety of sandstone samples. Signal-processing techniques for the analysis of waveforms recorded in an attenuating mud-filled borehole have been developed and tested in the laboratory.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
