High quality borehole logging instruments to capture structural and mechanical data across Australia.
What do we offer?
Terrascan was created to deliver technical excellence for the geotechnical and resource industries. We offer a variety of specialist services under one roof, bringing you industry leading results in a convenient, cost effective package.
Slope stability instrumentation.
Cone Penetration Testing
If required, we also have a close relationship with Terratest, a leading provider of geotechnical drilling services across Australia.
Borehole Imaging and Geophysics
We operate a variety of downhole imaging and geophysical tools, including Optical and Acoustic Televiewers, Natural Gamma and Full Waveform Sonic. Terrascan is also able to produce interpretation reports of the data collected.
Optical and Acoustic Televiewers
Terratest has access to the latest generation of orientated downhole imaging and data probes including the Acoustic and Optical Televiewers.
Borehole imaging can be used either in conjunction with or as an alternative to core logging, as collecting a continuous high quality sample can be difficult. By utilising a televiewer, clay seams, voids, fractures and unit boundaries can be correctly orientated and depth recorded.
Projects including the WestConnex M4 and M5, Sydney Metro and Southlink, have seen the value in orientated borehole imaging. Not the mention the numerous mining and resource applications.
FWS (Full Waveform Sonic)
The FWS tool (full waveform sonic) is popular in the water, mining and geotechnical industries. often used in combination with other logs (acoustic and optical) to provide mechanical properties of the borehole wall. with the correct borehole conditions, P and S waves can be detected and velocities calculated.
The FWS tool can only be operated in a fluid filled borehole (similar to the Acoustic tool) as the energy source does not travel well through air.
The natural gamma tool measures the naturally occurring gamma radiation in the broehole. They are versatile as they can be used in fluid filled or dry boreholes and can be attached to another tool if desired. Both cased and open holes are suitable for this tool.
Dual Compensated Density
The Density tool measures density in g/cc of the borehole wall. Often used in Geophysics, Petrophysics, sedimentology and geotechnical investigations. Density is measured using a radioactive source (usually Cs or Co) to emit gamma radiation into the borehole wall and measure the scattered returns using recievers at different spacing's (long and short spaced).
- Caliper - borehole diameter in cm or inches
- RHOLSD - Long spaced density in g/cc
- RHOSSD- Short Spaced density in g/cc
- RHOB - Compensated density in g/cc