Full Waveform Sonic
QL40-FWS
QL40-FWS-S
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.
Sensor
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
Weight
18 kg (39.7 Ibs)
Measurements/Features
Full waveform per receiver
Real time p-wave velocity or slowness
Real time CBL processing
Additional post processing module available in WellCAD
DOWNLOAD QL40-FWS PRODUCT BROCHURE DOWNLOAD QL40-FWS-S PRODUCT BROCHURE
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