OKEA ASA has let a subsea contract to Subsea Integration Alliance (formed by Subsea 7 SA and OneSubsea, a Schlumberger Ltd. division), for the Hasselmus project, 7 km northwest of the Draugen platform in the southern Norwegian Sea.
The Draugen license operator and partners Petoro AS and Neptune Energy Norge AS are developing the gas discovery—the first tie-back to the Draugen platform—which is expected to add over 4,000 boe/d to production, OKEA said in June (OGJ Online, June 2, 2021).
Work scope covers engineering, procurement, construction, and installation (EPCI) of the subsea production systems (SPS) and subsea pipelines (SURF) for a single subsea well with direct tie-back to Draugen (OGJ Online, May 6, 2021). The SURF scope comprises about 9 km of pipe-in-pipe flowline and associated structures in water depths of about 250 m.
The Hasselmus reservoir contains gas in sandstone of early Jurassic age in the Ile and Ror formations. The company is working toward a 2023 production start.
Project management and engineering will commence immediately at Subsea 7’s offices in Stavanger, Norway. Fabrication of the pipelines will take place at Subsea 7’s spoolbase at Vigra, Norway, and offshore operations will be executed in 2022 and 2023.