Type:
Gas
Facility:
Production
Water Depth:
30
Installed:
1971
meters
Block:
49/23
Design:
Fixed steel
Sub Structure:
703
Topsides Wgt:
2346
tonnes
tonnes
Intro
AT is a pipeline terminal and central reception platform on the Indefatigable West development (Block 49/23), installed in 1971. It functions as a gathering and export hub where gas and condensate from Inde West installations are collected, compressed if required, and routed into the wider Southern North Sea pipeline network toward Bacton Gas Terminal.
Field
AT serves the Indefatigable gas field’s central role in the West compartment, handling gas from multiple satellite and wellhead platforms. The field’s Rotliegend reservoir spans several blocks, and AT provides continuity in gas export into UK infrastructure.
Facilities
AT features large reception manifolds for incoming pipelines from AD/AP, BD/BP and CD/CP clusters. It includes metering skids, slug catchers, primary separation (if present), and facilities to ensure export gas meets pipeline entry specifications. Compression modules may be installed to boost pressure for export pipelines. Utilities include power generation/distribution, instrument air, fire and gas detection, and field control systems. AT integrates subsea umbilicals and risers with topside distribution equipment. Gas export lines tie AT to export pipelines servicing the Bacton Gas Terminal. Control systems link AT to shore and adjacent platforms, enabling coordinated operations and safety oversight. Structural design supports heavy processing modules and accommodates wave, wind and operational loads typical of UK Southern North Sea installations.
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