The spectral ratio method is used to calculate the quaiity factor (0) in porous rock samples at ultrasonic frequencies (0.3 -1.5 MHz). The data were ccllected using the pulse transmissicn technique with aluminum used as a high 0 standard. The data set ccnsists of dry, water and benzene saturated rocks at differentia! pressures from zero to one kilobar. Two sandstones, Berea and Kayenta, Bedfcrd limestone, and Webatuck dolomite are studied. Water and benzene were chosen as pore fluid saturants to contrast the effects of two different pore fluids (density, compressibility, viscosity, dielectric constant, and wetting properties) at ultrasonic frequencies. The main features observed are: 1) The quality factor 0 increases with increasing confining pressure; at low pressures the rate of increase is larger. 2) 0 for saturated samples is generally lower than for dry samples.3) The introduction of a fluid saturant into a dry rock increases S-wave attenuation more than P-wave attenuation. 4) In general, given the measurement error and the fact that these results are preliminary, the differences in attenuation between the two fluid saturations, water and benzene, are not large. Nevertheless, we observe that benzene-saturated attenuations are slightly higher than water-saturated vaiues, particularly at lower pressures (less than 500 bars) for the P-wave.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.