Enviros performed a scope of work to assist EWE DE (primary client) in the acquistion of geophysical site survey services as part of three major offshore windfarm developments located in North Sea, German sector. These windfarms comprised Riffgat, Borwin and Helwin developments, each located in southern North Sea region. Enviros provided the multirole vessel MV Poseidon to complete the full scope of work at each windfarm site. The purpose of the site survey works was to acquire seabed bathymetry and seabed data to allow the delineation of shallow lithology features. Enviros understood the survey scope of work performed at Riffgat, Borwin and Helwin is to enable the assessment of installation risks for proposed seabed hardware and to reduce future design installation risks through the development of detailed soil ground models.
The geophysical scope of work comprised acquistion of high quality data utilising techniques comprising side scan sonar, sub-bottom profiler (hull mounted Pinger), sub-bottom profiler (Sparker) and solid digital stream systems. Enviros provided the technical capability to acquire high-resolution seismic profiles of the ‘shallow’ sub-bottom strata.
Project Organisation
Enviros were responsible for performance of all pre-mobilisation, mobilisation, fieldwork, demobilisation and associated data processing, interpretation and reporting. A senior Enviros Project Manager with >15 years relevant offshore site survey / investigation experience was appointed on contract award and responsible for each project phase and Client liaisons throughout. The Enviros Project Manager was appointed an experienced Enviros Offshore Project Manager for all fieldwork operations.
The Project Manager had the role of managing day-to-day issues relating to the project, based onshore in the Enviros head office based in United Kingdom. The Offshore Project Manager was responsible to ensuring that the project is completed in accordance with Enviros procedures and to Client specifications. Responsibilities include, but not limited to being the immediate point of contact for any Offshore Client Representatives, ensuring project QHSSE procedures are adhered to during all offshore operations; this is to include mobilisation, field calibrations and checks, project tasks, post project calibration checks and demobilisation; and the production or approval of all necessary field reporting.
