Study on the fractured model acoustic attenuation coefficient numerical simulation

Ultrasonic data is the important information to study the carbonate reservoir pore structure，acoustic response can be used to inversion the pore structure. Base on the acoustic wave theory, the authors study the fracture model, to carry out numerical simulation of ultrasonic wave. The results show that with the increase of fracture porosity, rock acoustic attenuation coefficient overall upward trend, However, the porosity growth in different ways, increasing function of the attenuation coefficient is also different rules; with the joint angle increases, the attenuation coefficient of acoustic rock is the linear law of increase. Attenuation coefficient increases as the crack density increases the power function rule, and pore density and linear attenuation coefficient; using numerical simulation method to avoid human error, saving the cost of experiments. At the same time, it can expand ideas that study cracks, fracture-cave structure of the rock acoustic experimental.