Enviros was contracted by TOTAL E&P Nigeria Limited to perform an integrated geophysical site survey and geotechnical site investigation at two primary jack-up locations and two relief well locations offshore Nigeria. Water depths at these locations were approximately 65m. Shallow gas hazard site surveys were performed by MV Ocean Spirit prior to commencing drilling, sampling and in situ testing operations.
The aim of the geotechnical site investigation was to recover high quality samples and record high quality in situ test data for the performance of spudcan penetration analyses. Geotechnical boreholes up to 50m depth were successfully completed at each spudcan of the primary jack-up and relief well locations. All recovered samples were uniquely identified, photographed and described prior the performance of appropriate testing in the dedicated laboratory onboard. Enviros geotechnical engineers provided TOTAL E&P Nigeria Limited with ‘real-time’ engineering analyses onboard MV Ocean Spirit to enable the optimisation of final borehole depth and overall efficiency in operations.
Project Organisation
Enviros provided technical assistance and expertise during all pre-mobilisation, mobilisation, fieldwork, demobilisation and associated onshore laboratory testing and reporting. The Project Manager appointed an experienced 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 local Russian office. The Offshore Project Manager was responsible to ensuring that the project was 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.
