The Saturn Banks Pipeline System (SBPS) currently exports gas from the Blythe and Elgood fields to the Saturn Banks Onshore Reception Facilities (SBRF) at Bacton, and onwards to the adjacent Perenco-Operated gas terminal. Gas export from the Southwark field has not happened. Further phases of development are envisaged from other fields.

All field assets and infrastructure are owned by various IOG subsidiaries (50%) and CalEnergy Resources (UK) Limited (50%). IOG affilates are the 'Field Operators', supported by appointed Installation and Pipeline Operators acting on behalf of IOG.

The Blythe field has been developed via two production wells from a two-slot Normally Unattended Installation (NUI). The Elgood field has been developed via a single subsea well, which is tied back to the Blythe NUI via a 9.2km 6” subsea flowline (PL4955) and associated umbilical (PU5039). From the Blythe NUI, wet gas is exported via the 24.5km 12” Blythe Field Export Pipeline (PL4956) and onwards through the 28.5km 24” SBPS (PL5079) to the SBRF.

The Southwark field has been developed via two wells from a four-slot NUI, tied back to the SBPS via a 6.0km 24” spurline and a 31.3km 24” repurposed line, collectively known as the Southwark Field Export Pipeline (PL5152). The wells were deemed sub-commercial and the platform has capacity for third party tie-backs. We are investigating the possiblity of produced water handling at Southwark.

Ullage of 160 before Blythe/Elgood production MMscf/d gas is available via the SBPS/SBRF, with greater capacity achievable depending upon the selected Entry Point and requested water handling capabilities, subject to flow assurance analyses. The fields are currently producing in their high pressure (free flowing) phase, with onshore compression anticipated after ca. three years of production.

KEY FACTS

First GasMarch 2022 (Blythe, Elgood)
Current ParticipationIOG (IOG UK Ltd, IOG North Sea Limited, IOG Infrastructure Limited) 50% (Op.), CalEnergy Resources (UK) Limited 50%
FluidsGas
InfrastructureNUI (Blythe, Southwark), Subsea well (Elgood)
OffloadingAll fields export via spurline to the SBPS and onwards to the SBRF before entry into the Perenco-Operated LAPS Annex and then the Perenco Bacton gas terminal
FuelDiesel fuelled power generation, future potential for renewables power generation (Blythe, Southwark)
Personnel on BoardUnmanned, Emergency accommodation for 12 (Blythe NUI) and 12 (Southwark NUI)
LocationBlock 48/23 (Blythe NUI), Block 49/21 (Southwark NUI)
LicenceP1736 (Blythe), P2260 (Southwark)
Design Life10 years (Blythe NUI), 15 years (Southwark NUI)
Operating Efficiency (target)>95%
Water Depth23m LAT (Blythe NUI), 39m LAT (Southwark NUI)

PROCESSING FACILITIES OVERVIEW

Blythe NUI

Southwark NUI

  • Two slots (in use) with associated flowlines
  • Four slots with associated flowlines and proppant handling packages
  • Production manifold; export manifold
  • Production manifold; export manifold; sphere launcher for liquids management
  • Chemical injection facilities (Methanol and MEG/CI), Space for a produced water treatment package
  • Chemical injection facilities (Methanol and MEG/CI), Space for a produced water treatment package
  • Power generation, crane and helideck
  • Power generation, crane and helideck
  • Emergency overnight accommodation for 12 POB
  • Emergency overnight accommodation for 12 POB
  • Communications via Line-of-Sight to Bacton
  • Communications via Line-of-Sight to Bacton
  • Remote control room service provided from Bacton Terminal operated by Perenco
  • Remote control room service provided from Bacton Terminal operated by Perenco
  • Minimal environmental impact (emergency venting only, no flaring, low power systems, fluid export with gas)
  • Minimal environmental impact (emergency venting only, no flaring, low power systems, fluid export with gas)

ENTRY POINT

Blythe NUI

Southwark NUI

Other

  • 1 x 6” Import Riser (Elgood)
  • 2 x 10” Import Risers (Nailsworth, spare)
  • PL4956 12” valve skid
  • 1 x 10” Import Riser and J-tube (spare)
  • 1 x 8” Import Riser (Elland, spare)
  • PL5152/PL5079 24" pipeline

AVAILABLE CAPACITY

The colour coding reflects availability thresholds over the next 5 years as reflected in the key

‎UnitMax*Projected Ullage (% of maximum) by contract year
20232024202520262027
Southwark PlatformMMSCFD107
%
%
%
%
%
Blythe PlatformMMSCFD60
%
%
%
%
%
SBPSMMSCFD240
%
%
%
%
%
SBRFMMSCFD160
%
%
%
%
%

*Greater capacity achievable depending upon the selected Entry Point and requested water handling capabilities, subject to flow assurance analyses

ENTRY SPECIFICATION

O2<0.1 mol%
CO2<3.5 mol%
H2S<3.3 ppm
Total Sulphur<35 ppm
SolidsNil
Water Contenttbd
Condensate Contenttbd
Wobbe36.0 - 52.2 MJ/M3
Gross CV<42.3 MJ/M3
Temperature0.6 - 37.8°C

COMMERCIAL RESTRICTIONS

Delivery Point at the SBRF is the Bacton terminal, operated by Perenco UK. Separate commercial negotiation required.


NEXT STEPS

Interested parties should contact the IOG Commercial Manager:

Alex McFarlane

alex.mcfarlane@iog.co.uk

+44 (0) 207 036 1400


DISCLAIMER

All of the above information is provided by ​IOG in accordance with the Infrastructure Code of Practice and associated guidance notes.

https://oeuk.org.uk/product/infrastructure-code-of-practice-icop-and-accompanying-guidance-notes/

The information is provided:

  • in good faith and without any liability;
  • without warranty, implied or express to its accuracy or relevance of use to any other party
  • without obligation to provide any further information in respect of the agreement/transaction to which the summary information relates;
  • without any obligation to provide access to infrastructure or services on the same terms and conditions; and,
  • IOG reserves the right to update and change the information at any time