The Norwegian Petroleum Directorate wants unmanned wellhead platforms to be considered more often as an alternative to subsea tie-back in connection with development decisions.
A new study will look into the benefits and disadvantages of wellhead platforms.
“The main argument in favour of unmanned wellhead platforms as a concept, is that this could be an efficient development solution in terms of both cost and production. In fact, it is just as functional and robust as a subsea development, and it is also more accessible for inspection and maintenance,” says Niels Erik Hald, principal engineer at the Directorate.
An unmanned wellhead platform is a facility with a fixed substructure installed on the seabed, with dry wellheads located on the platform deck.
The concept is an alternative to subsea wells where the wellheads are placed on the seabed. There are various types of unmanned wellhead platforms – from simple facilities to more advanced solutions including process equipment. Some can be accessed from vessels, while others have bridges or helicopter decks.
The Norwegian Petroleum Directorate has commissioned a study to obtain further knowledge about the different types of unmanned wellhead platforms.
The study, to be performed by Rambøll Oil & Gas, is expected to be submitted to the authorities towards the end of December.