Operations

The Malory Field was discovered in 1997 by Mobil operated well 48/12d-9. It encountered a 76m gas column in good quality Rotliegendes Leman Formation sandstones, with a gas down to at the top of the Carboniferous. A DST flowed at 30.6 mmscf/d and core data confirms permeabilities up to 1651 mD.

The field was developed via an unmanned platform tied back to the Galahad Tee in the Galahad 12in export pipeline which enters the Lancelot Area Production System (LAPS) at the Lancelot Subsea Tee. From this point the Malory production is evacuated to the Perenco Bacton Gas Terminal processing facilities in Norfolk. Production from the 48/12d-9 well commenced in October 1998. The original mapped GIP at Annex B submission was 99 bcf, however by November 2024 the cumulative production was in excess of 169 bcf from the single well.

Perenco UK took over operatorship of the field in 2007 and the current interests in the Malory Field unit are Perenco 76% and Everard Energy 24%. In 2022 the gross production of sales gas from Malory averaged between 5.5 to 6 mmscf/d. Since 2016 decline curve analysis has shown a clear hyperbolic trend with production at Malory anticipated to continue beyond 2030. The cause of the hyperbolic trend and associated pressure support is unproven but is likely to be due to either recharge from an adjacent Rotliegendes fault block or from the Carboniferous formations underlying the Rotliegendes reservoir.

The Lancelot Field was discovered in 1986 by the Mobil operated 48/17a-2 well. The field came on stream in July 1993 and gas and condensate from the 1 vertical and 3 horizontal development wells are evacuated via the Lancelot Area Production System (LAPS) pipeline. The gas and condensate are received at the LAPS owned onshore slug-catcher and compressor at Bacton in Norfolk, from where it is delivered over the fence to the Perenco operated Bacton Gas Terminal.

Perenco UK took over operatorship of the field in 2007 and the current interests in the Lancelot Field unit are Perenco 98% and Everard Energy 2%. Cumulative production from the field as of November 2024 was ca. 205 bcf gas. In September 2019, a leak from the Lancelot subsea isolation valve in the export pipeline led to a prolonged shut-in until a successful intervention was achieved in February 2022.  Following significant flush production since the wells were brought online in March 2022, the current sales gas production from Lancelot field during the first half of 2023 is between 5 to 7 mmscf/d.

Everard Energy also owns 2% of the Lancelot Area Production System (LAPS) which continues to attract significant third-party business. Several new compression services agreements have been entered into since 2017. In October 2017 production from the Perenco operated INDE area fields arriving onshore was diverted into the available ullage in the LAPS compressor. Perenco operated Leman production entered the LAPS facilities in September 2020. This year (2023) Perenco’s new offshore compression facilities platform 49/27BC came online in mid-2023, boosting the volume of combined flows from the Perenco-operated INDE and Leman area fields through to the LAPS compressor. This new infrastructure, part of Perenco’s Southern Hub Area Rationalisation Project (SHARP) for the Leman and Inde fields, provides a significant life extension for the LAPS shore facilities and the Bacton Gas Terminal. Further third-party gas production will arrive at the LAPS compressor after tie-in works for the Saturn Banks Fields (Operator: CalEnergy Resources) are completed during the 2025 summer shutdown of the Bacton Gas Terminal.