Geotechnical and geophysical data

Need high resolution image of the sub-surface (<10m)?

The PLA can acquire a 3D CHIRP survey.

Benefits:

• A subsurface image with 12.5 (or 25cm) horizontal resolution
• The acquisition of GeoChirp 3D data will open opens up for extraction of geophysical properties and object detections

Deliverables:

• Report
• Geotiff of GeoChirp 3D Coverage
• Processed 3D SEG-Y files (NMO and migrated)

Need know the depth to a sub-surface layer to de-risk engineering design?

The PLA extract geophysical horizons from 2D and 3D seismic data.

Benefits:

• Allow accurate calculation of required pile depth
• Reduce the risk of surprises during the construction phase

Deliverables:

• XYZ isopach layer of the top sediment boundary
• Geotiff of GeoChirp 3D Coverage
• Processed 3D SEG-Y files

Need to know the strength of subsurface material for engineering works?

The PLA can conduct Cone Penetration Tests using a coiled tube CPT unit

Benefits:

• Deployed from vessel
• Reduced risk for engineering works

Deliverables:

• Report
• CPT data is converted in AGS format and interpreted logs produced

Need to obtain a subsurface core for analysis?

The PLA can acquire cores using a VibroCorer unit.

Benefits:

• Deployed from vessel

Deliverables:

• Report
• Cores

Need to image the subsurface to 10s of meters?

The PLA can acquire a 2D seismic profile using a multi-channel boomer system.

Benefits:

• 10s of meters imaged (dependant on sediments)
• True depth imaging, derivation of ground model with attenuation and velocity calculations

Deliverables:

• Report
• Processed 2D SEG-Y files (NMO and Migrated)
• True depth imaging (optional)
• Ground modelling with velocity and attenuation (optional)

Need a 2D image the subsurface to <10  meters?

The PLA can acquire a 2D seismic profile using a single channel Chirp or Pinger system.

Benefits:

• Penetration  to  ~10m  (or approximately water depth due multiple)
• High frequency (16kHz+) giving high resolution

Deliverables:

• Report
• Processed 2D SEG-Y files
• Stratigraphic interpretation