Numerical simulation of the fractured model acoustic attenuation coefficient

Ultrasonic data is the important information to study the carbonate reservoir pore structure; the acoustic response can be used in the inversion of pore structure. This paper was based on the acoustic wave theory and the fracture model to carry out numerical simulation of ultrasonic wave. The results showed that with the increase of fracture porosity, rock acoustic attenuation coefficient exhibited an overall upward trend. However, for different ways of porosity growth, the increasing function of attenuation coefficient is also different; when the angle between the directions of crack extension and acoustic excitation increases, the attenuation coefficient increases linearly. Attenuation coefficient increases as a power function as the crack density increases. The numerical simulation method can avoid human errors and save the cost of experiments. At the same time, it can expand ideas for studying cracks and fracture-cave structure of the rock with acoustic experiments.