Method and system for geophysical and geologic modeling

Abstract

A method and system for using sonography to image the internal structure of geophysical and geologic models are disclosed. The sonography system includes a wand having a plurality of piezoelectric elements at an active surface thereof, each coupled to driver/receiver circuitry. Certain of the piezoelectric elements are selected as ultrasonic sources and receivers; the source/receiver designation may vary over time, as each of the elements may either generate or receive acoustic energy. A computer system, connected to the wand, receives signals from the receivers corresponding to reflected and refracted ultrasonic energy, and generates a zero offset trace image therefrom. In the geophysical case, the scale model is formed of materials such as plastics and rubbers having the desired properties for simulating the response of a portion or layer in the earth to ultrasonic vibrations. Sonography serves to measure the actual structure of the geophysical model, so that the effectiveness of seismic survey designs and data processing techniques may be evaluated. In the geologic case, the model is formed of clays, and a force applied thereto from one side. Sonography allows for real-time visibility into the internal structure of the model during the application of the force, so that the internal dynamics can be monitored. Dry sand geologic models can utilize sonographic inspection via a metal plate on the bottom of the model, which provides coupling of the ultrasonic energy into the dry sand bed.