Type:
Oil
Facility:
Production
Water Depth:
145
Installed:
1979
meters
Block:
33/9
Design:
Gravity-based concrete
Sub Structure:
0
Topsides Wgt:
0
tonnes
tonnes
Intro
Statfjord A is a concrete gravity-base integrated production, drilling and quarters platform on the Statfjord oil and gas field in the northern North Sea. Installed in the late 1970s and producing first oil in November 1979, it processed oil and associated gas with export via offshore loading systems and pipelines. Statfjord A’s concrete base included marine storage cells and production facilities located in ~145-m water depth.
Field
The Statfjord field spans ~580-km² along the UK–Norwegian median line in the North Sea, discovered in 1974 and on stream from 1979. It produces oil with associated gas from multiple Jurassic and Triassic sandstones, developed via three large concrete platforms (A/B/C) and subsea templates. Statfjord is one of Norway’s historic giant fields.
Facilities
Statfjord A’s concrete gravity base structure (GBS) supported a steel topside with integrated drilling, production, oil storage, gas handling, and accommodation modules. Its topside included drilling slots in concrete shafts, multi-stage three-phase separation, crude stabilisation, storage cells within the GBS, and facilities to export crude using offshore loading systems (e.g., Ukols) and shuttle tankers. Associated gas was compressed and exported via the Statpipe system to onshore processing at Kårstø and onward to European markets. Utilities encompassed power generation, water handling, flare and safety systems, and integrated control networks coordinating well operations and export infrastructure. Over decades the installation supported reservoir pressure management through water/gas injection wells drilled through its shafts, though it is slated for decommissioning with permanent plugging of wells and topside removal after extended service.
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