The subsea installation campaign began in July 2015 and is progressing well. In total, 35,000 tonnes of equipment is being installed on the seabed in the TEN fields.
The first equipment to be installed was the FPSO’s nine anchor piles, which will hold the FPSO in position. These 21 metre high steel cylinders, fabricated in Ghana, were installed in the seabed by the Normand Installer in July and August 2015.
The bulk of the subsea production equipment is being installed by the TS7 consortium (Technip and Subsea7). The Seven Borealis and Simar Esperanca operated in the fields in the second half of 2015. Their work scope included the installation of three Enyenra manifolds, one Ntomme manifold and the Enyenra and Ntomme oil production riser bases. At the same time, several pipe laying vessels completed the installation of flow lines on schedule.
The project’s umbilicals, which will connect the FPSO to the subsea equipment and have a total combined length of over 60 kilometres, arrived in Ghana in November 2015. The installation of the first 10 was completed by the Viking Neptun in January 2016 and the remainder will be installed by the Deep Pioneer by the end of April 2016.
The flexible risers, which will carry fluids to and from the FPSO, are being installed by the Deep Energy. Following its arrival in the field, the FPSO will be hooked up to the subsea production system and commissioned. The final milestone in the campaign, the installation of all umbilicals and risers, is planned to be completed by June 2016.