Joint inversion of laboratory-measured acoustic phase velocity and quality factor data

Turainé Vurom, Brigitta and Dobróka, Mihály (2023) Joint inversion of laboratory-measured acoustic phase velocity and quality factor data. GEOSCIENCES AND ENGINEERING: A PUBLICATION OF THE UNIVERSITY OF MISKOLC, 12 (1). pp. 5-19. ISSN 2063-6997

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Abstract

The paper presents a new rock-physical model to describe the pressure dependences of the phase velocity and quality factor (Q). Acoustic laboratory data for P-wave velocity and Q factor were measured on the sandstone sample at 40 different pressures. The spectral ratio method was used to measure the Q factor data utilizing an aluminum sample (with the size and geometry of the rock sample) as a reference. The measured velocity and Q factor data were processed in an inversion procedure. The results showed that both the velocity-pressure and the Q factor pressure dependence can be well-described utilizing the newly developed rock-physical model in forward modeling. From the estimated inversion parameters, vp and Q can be calculated for the full pressure range.

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