Contact: Philippe Plantevin Email : pplantevin@soacsy - Website : soacsy

1. A NEW ACOUSTIC SOLUTION FOR SEABED CHARACTERIZATION Contact: Philippe Plantevin Email : pplantevin@soacsy.com- Website :www.soacsy.com Tél. +33 (0)4 90 49 06 91- Mob. +33 (0)6 60 24 16 25

2. OUR SOLUTION • SEABED CHARACTERIZATION TODAY • Geophysical (SBP) and Geotechnical (Piezocone, coring) tools used for seabed assessment • Results often difficult to correlate • - Current available acoustic solutions limited to qualitative visualization OUR SOLUTION: SOAC-LOGS • - Gives access to Geoacoustical, Geotechnical or Granulometric parameters • Down to 50 ft. in sands while maintaining very high resolution (< 4 in.) • Even in inaccessible or complex zones (near oil platforms) AN INTEGRATED SOLUTION: FROM ACQUISITION TO CHARACTERIZATION Acquisition Post-Processing Characterization SOAC-CHIRP SOAC-LOGS SOAC-LOGS Sub-bottom profiler Acquisition software Processing software Software module: Estimation of absorption, reflectivity, impedance Calibrations Geotechnical and Granulometric estimations Direct measurements (piezocone, coring)

3. APPLICATIONS • Access to a full seabed 3D view between CPT points for pipeline routing • => avoid mismatch with a predefined installation path • Detect buried structures even near oil platforms • => to draft precise implementation plans as well as optimizing and facilitating on site work - Offshore Eng. : Determine Best anchor points to focus coring - Marine aggegates: Optimizes exploitation without coring - Coastal hazards: Evaluate slope stability • BENEFITS: • Better understanding of geological processes • Reduced operating costs – Time effective • Better assessment of geotechnical hazards

4. SOAC-CHIRP Sediment Profiler Integration example: Nymphea / Geocean • Developed to optimize SOAC-LOGS characterization performance: • Chirp signals from 400 Hz up to 8 kHz • => High penetration (50 ft. in sands) with high resolution (< 4 in.) • High stability of the source • => Advanced signal processing, • Innovative antenna • => High rejection of lateral echoes (±7°) • Easy mounting on small pneumatic boats and survey vessels between 6 m (20 ft) and 15 m (50 ft). • Easy handling: 4 modules less than 36 kg (80 lbs) SOAC-CHIRP can be operated even in inaccessible or complex zones

5. SOAC-LOGS Module for characterization Sub-bottom profiler Full signals in seg-y format (module and phase) Soac-logs Sounder Parameters (Source Level,…) 0) Raw seismogram 1) Absorption (dB/) 2) Reflectivity (dB) 3) Impedance (kg.m-2s-1) *Data provided courtesy of IFREMER : exeample of result with CHIRP GF Geotechnical or Granulometric parameters Calibration Direct measurements Cp, 

6. SHALLOW WATER EXAMPLE A project carried out by Soacsy next Nice Airport Seismogram SOAC-CHIRP Acquisition: SOAC-CHIRP Layers of sediments Acoustic impedance SOAC-LOGS Fine-grained sediments Gas front

7. DEEP WATER EXAMPLE Data acquired by Ifremer (Suroit Vessel) - Storegga (Norway) Raw seismogram Corrected seismogram Improved vertical resolution Estimated impedance: The strong reflector of a fine layer with a very low impedance

8. CONCLUSION • >Validated on various dataset by comparison with direct measurements: • Using a piezocone (Guinea Gulf – Ifremer/Total) • Using physical measurements carried out after coring (Marmara sea – Collège de France/Ifremer). • >Technology currently sold as a service operated by Soacsy • >Product available soon for sale and hire • >SOACSY is looking for technical and financial partnerships in order to sell its solution on the US market.