Near Surface Geophysics > Acoustic logging at well M20

In 2014, on the Hydrogeological Experimental Site of the University of Poitiers, full waveform acoustic data have been recorded in 11 wells in order to evaluate the potential of the acoustic method to detect karstic bodies and flows, the results being compared with seismic data, BHTV logs and flow measurements.

Figure shows the site and the location of the well M20.

The example describes the methodology developed to process acoustic data when they are corrupted by noise. The automated procedure is based on Singular Value Decomposition processing which is used to estimate simultaneously the velocity of the formation, the amplitude of the acoustic signal and the level of noise.