|
| | Abstract | | To validate attenuation phenomena observed in various seismic methods at widely different frequencies and to elucidate the rock physics mechanism responsible for those phenomena, laboratory experiments should be conducted in a broadband frequency. Although experimental studies have been performed at ultrasonic frequencies, recent development of low-frequency measurement systems enable us to measure velocity and attenuation of core samples in a broadband frequency. There is room for improving existing low-frequency measurement system to obtain reliable and stable laboratory data. In the present study, we propose a novel method to measure dynamic properties of fractures in a broadband frequency by visualization of seismic wave propagation. The advantage of our proposed method over existing methods is that we can measure the local properties of a core sample, which may lead to more stable measurements than existing methods measuring the average properties of a core sample. |
|
|
|
| |
|