Troll A platform

Troll A platform. It is a condeep-type natural gas offshore platform located in the Troll gas field, approximately west of Kollsnes, Norway. Operated by Equinor, it is a central hub for Norwegian gas export to continental Europe and holds the record as the tallest structure ever moved by mankind. The platform's immense scale and innovative engineering have made it an icon of the Norwegian petroleum industry.

Overview

The platform was developed to tap the vast reserves of the Troll gas field, one of the largest offshore gas fields on the Norwegian continental shelf. Its primary function is gas processing and export, with pipelines connecting it to the Kollsnes processing plant and onward to European markets like Germany, Belgium, and the United Kingdom. The field is a cornerstone of Norway's economy and energy supply for nations across the North Sea. Ownership is shared among several major energy companies, including state-owned Petoro and international firms like Shell and TotalEnergies.

Construction and installation

The condeep design, pioneered by Norwegian contractors, features a gravity-based structure made of reinforced concrete with storage cells for condensate. The construction took place in a deep fjord near Stavanger, with the concrete base built at Norwegian Contractors' site in Vats. The integrated deck, weighing over 20,000 tonnes, was built separately and mated with the substructure before the record-breaking tow-out in 1995. The tow, conducted by companies like Heerema Marine Contractors, involved moving the 472-meter tall structure over to its final location, a feat documented by media like the BBC.

Technical specifications

The structure stands 472 meters from the seabed to the top of its flare boom, with 369 meters submerged below the sea surface. It rests on the seafloor at a depth of 303 meters, making it one of the deepest offshore platforms of its kind. The platform can process up to 120 million standard cubic meters of gas per day, which is transported via the Zeepipe and Europipe pipeline systems. Its concrete base contains 19 storage cells and one riser shaft, with a total displacement of over 1.2 million tonnes when ballasted.

Operational history

Production began in 1996, with King Harald V of Norway officially opening the facility. It quickly became a critical component of European energy security, supplying a significant portion of natural gas to countries like France and the Netherlands. Major milestones include the installation of additional gas compression modules to maintain reservoir pressure and extend field life. The platform has also been featured in numerous documentaries and was a filming location for scenes in the James Bond film The World Is Not Enough.

Environmental impact and safety

Operations are regulated by the Norwegian Petroleum Directorate and the Ministry of Petroleum and Energy, with strict adherence to international standards set by bodies like the International Association of Oil & Gas Producers. The platform is designed to withstand extreme North Sea weather and seismic events, with rigorous safety protocols managed by Equinor. Environmental monitoring focuses on emissions control and preventing discharges to the sea, aligning with Norway's commitments under the Paris Agreement and regulations from the European Union. Category:Natural gas platforms Category:Offshore construction Category:Buildings and structures in Vestland