Experimental analysis of P-wave attenuation in sandstone of reservoir with ultrasonic frequency

By using ultrasonic frequency, pulse transmission technique was used to probe the dispersion and attenuation mechanism of fluid-saturated rock in laboratory. The attenuation characteristics of dry and different fluid-saturated sandstone samples under different confining pressure were studied. The method of measuring the attenuation of rock samples was introduced. Spectrum was analyzed on dry samples and fluid-saturated samples, and the attenuation mechanism discussed. Biot-flow model and BISQ model were sed to analyze the attenuation related to the fluid flowing in fluid-saturated rock. The relative contribution of the attenuation mechanisms to the overall attenuation of elastic wave was quantitatively analyzed. The applicability of the attenuation mechanisms related to fluid flowing was discussed under the condition of introducing experimental results into practical seismic exploration.