Full Waveform Sonic



The ALT QL40-FWS tool is specifically designed for the water, mining and geo-technical industries. Its specification makes it ideal for cased-hole and openhole applications, and for the identification of fractures. Sonic logs are widely used, often in combination with other logs, to provide porosity, permeability and geomechanical properties of rocks.

The new QL40-FWS tool is optimized for such purpose. It implements a high energy source generated by a ceramic-piezoelectric transducer that excites the formations in such a way that waves of different frequencies are developed and propagated.

Real time analysis and processing of the full waveform are performed by the tool to enhance the picking of the different wave propagation modes. The tool can only be operated in a fluid-filled hole. Logging speed depends on tool configuration and acquisition parameters.


Ceramic piezoelectric

Temperature – Pressure

0-70°C (32-158°F)
200 bar (2900 psi)

Diameter – Length

50 mm (2”)
2.27m (89.4’’)
1Tx-4Rx configuration


18 kg (39.7 Ibs)


Full waveform per receiver

Real time p-wave velocity or slowness

Real time CBL processing

Additional post processing module available in WellCAD


Manufactured by Geotomographie GmbH

Technical Details

Generated wave types: SV
Signal frequencies: Up to 500 Hz (depending on geology and borehole distance)
Operational depth: Up to 100 m
Source length: 1015 mm
Source weight: 6 kg
Cable weight per metre: 377 g
Borehole diameter: 75-100 mm (or larger if spacers are used)
Clamping system: Infatable bladder
Depth indicator: Cable marking every 2 m
Connector: To impulse generator IPG800 or IPG5000
Storage: On drum
Switch box: Switch between two vertical shot directions

If you have a question OR REQUIRE A QUOTE, CONTACT us and one of our professional team members will assist you