UKCS: First oil from BP’s Alligin field

UKCS: First oil from BP’s Alligin field

Today BP announced that the first oil was produced from the 20 MMboe subsea Alligin field in the Greater Schiehallion area, West of Shetland

The press release from BP states that the forecast was to produce 12 Mboe/day at peak. So far, they have exceeded this, reaching 15 Mboe/day at peak since the start-up in late December.

The Alligin field subsea development was approved by the Oil and gas authority back in 2018. The field is located 140 kilometres west of Shetland in a water depth of 475 metres. It forms part of the Greater Schiehallion Area. BP is the operator (50%), with partner Shell 50%.

The development has included new subsea infrastructure, consisting of gas lift and water injection pipeline systems, and a new controls umbilical, according to BP. It consists of a two-well subsea tieback into the existing Schiehallion and Loyal subsea infrastructure and the Glen Lyon floating, production, storage, offload (FPSO) vessel.

Alligin was discovered in 1995 with exploration well 204/19-6, the reservoir is Lower Palaeocene reservoirs which comprise deepwater confined turbidite sands, linked to similar-aged reservoirs on Schiehallion, sharing similar reservoir properties.