Cavern Sonar Survey
BGES is honoured to be SOCON’s exclusive partner in providing high-quality sonar surveys to cavern operators across Canada.
SOCON (Sonar Control Kavernenvermessung GmbH) is a German-based world-renowned specialist in the surveillance of underground caverns. Sonar surveys are commonly performed to determine the geometry of underground caverns. When creating a new cavern, sonar surveys are used to document the development of shape and volume during the wash phase. For storage and disposal caverns, it is important to monitor the change in volume and any possible changes in shapes.
Sonar surveying of caverns is based on travel time measurements. It measures the time a sonic signal takes to travel from the survey tool to the cavern wall and back. The distance to the cavern wall is calculated from the measured travel time and the speed of sound in the medium. The acoustic velocity depends on the density, the composition and the characteristics of the medium existing in the cavern, and is determined in-situ using a special tool module.