A three-well subsea tie-back project to connect with existing facilities on the Heron pipeline and hosted by the BP ETAP facility.

Development project


Oil and gas





Project details

The Seagull multi-well subsea project connects the oil and gas field with existing nearby facilities. The field is projected to hold 13.8 mmboe net 2P reserves. Development starts in 2019 with first oil projected for 2021.

The Seagull field will be developed with up to four subsea wells drilled from a new four-slot manifold 17 km south of the BP-operated ETAP Central Processing Facility (CPF). Production will be evacuated via a new 5 km subsea pipeline, which will tie the Seagull manifold to the existing Heron pipeline system via a newly installed tie-in skid at the Egret manifold. Production will then utilise the Heron pipeline system and riser to evacuate fluids to the ETAP CPF. The planned development will require installation of a new 17 km control umbilical direct from ETAP.

From the ETAP CPF Seagull gas will be exported via the CATS pipeline system to shore at the CATS Processing Terminal. Seagull oil will be exported to shore through the GAEL and FPS pipeline systems to the Kinneil Terminal onshore.

Wash water will be provided to the Seagull drill centre via the existing Heron wash water riser and flowline, and a newly installed 5 km long wash water line between the existing Egret manifold and the Seagull manifold. A pre-investment will be made to facilitate future connectivity between the gas lift service and the manifold.

New infrastructure requirements have been minimised by reuse of the Egret manifold tie-in point on the Heron cluster pipeline system and wash water line. Topsides modifications at ETAP are minimised by reuse of the Heron field test separator and existing Heron risers for production and gas lift service.

Project status

As at February 2019

The development team is currently preparing planning documents to secure a licence extension and government approval of its Field Development Plan.

Projected first oil 2021


Neptune Energy (35%), BP Exploration (50%), JAPEX UK E&P (15%).


Neptune Energy