Marine Geophysical / Geotechnical Survey Services
Marine geophysical and geotechnical surveys are the core of Seaforth’s services.
The information obtained through geophysical and geotechnical surveys facilitates the development of sub-sea engineering concepts, allowing design and implementation decisions to be made in a timely and cost effective manner.
Seaforth conducts comprehensive, multidiscipline marine surveys to provide the precise information required for design, engineering and installation of marine infrastructure. These projects may include:
- Cable and pipeline route surveys and inspections
- Port infrastructure development
- Oil & gas site surveys and inspection
- Engineering support
In addition to engineering based project support, Seaforth also conducts environmental and research based surveys. These surveys include, but are not limited to:
- Environmental research, assessment & monitoring
- Coastal and benthic habitat mapping
- Search & recovery
- UXO surveys
Seaforth owns, maintains and utilises a comprehensive suite of survey equipment to undertake these surveys, including:
- Multibeam and singlebeam echosounders
- Water column profiling underway SVP and CTD
- Sidescan sonars, scanning sonars
- Seafloor photography and video
- High resolution subbottom profilers (chirp, boomer, parametric & sparker)
- Piston/Gravity coring and vibracoring
- Grab sampling
Marine Geophysical & Geotechnical Projects:
Uruguay: Borehole and CPT Survey
Project date: January – March, 2011
The objective of this survey was the geotechnical investigation of a proposed iron ore export terminal site, including collection of geotechnical sample and CPT data and laboratory testing for boreholes of various depths (10-50m BML) in support of port development design and engineering. Deliverables included advanced laboratory sample testing and foundation engineering analysis.
Sable Island, NS: Deep Borehole and Seismic PCPT Survey; Foundation engineering and installation of the Deep Panuke Production Field Centre
The objective of this geotechnical investigation was to ascertain the subsoil conditions and acquire geotechnical design data related to the foundation engineering and installation of the Deep Panuke Production Field Centre (PFC) and export pipeline and a subsea isolation valve (SSIV). In order to provide this information a program of piezocone penetration test boreholes (PCPT) and seismic sampling boreholes were specified. The concept for the PFC is a mobile, jack-up, four legged structure founded on large diameter suction cans. In order to provide engineering design information a series (20+) of piezocone penetration test boreholes (PCPT and seismic) and sampling boreholes were specified. Six further locations were also investigated to collect data for the export pipeline.
Fort Lauderdale, Florida: LNG Terminal Site Survey
Project date: 2007
Seaforth provided geophysical seabed mapping and geotechnical sampling services for the proposed Calypso offshore LNG deepwater mooring and offloading buoys. The project involved a full suite of seabed mapping tools (sidescan sonar, sub-bottom profiler, multibeam, magnetometer, navigation and data acquisition suites). A second phase of the survey included collection of vibracores for geotechnical analysis.
New York & New Jersey: LNG pipeline and FSRU Site Survey
Seaforth provided acquisition and interpretation of high-resolution analog geophysical data, multibeam, seismic boomer/sparker & chirp and sidescan for the design and engineering of the proposed BlueOcean Energy LNG pipeline and FSRU site, Project management of data control, processing and interpretation and reporting personnel in shore based office.