Technip and Aker Solutions have recently announced they both have been awarded front-end engineering design (FEED) contracts by Statoil ASA for the development of the Aasta Hansteen (formerly named Luva) Spar platform. This facility will be the largest of it’s kind with a total hull length of 193 meters and a draft of 170 meters.
Aker Solutions' Belly Spar design, showing relative size in a city context, image courtesy Aker Solutions
The Aasta Hansteen is destined for the high seas offshore Norway, at a water depth of approximately 1,300 meters (4,265 feet) and will be the first Spar platform on the Norwegian continental shelf (NCS). This platform will also the world’s first Spar platform with condensate storage capacity.
Aker Solutions’ announced that they will incorporate a condensate storage feature called a ‘belly.’ The ‘belly’ refers to the increased diameter on part of the circular shaped hull, where the condensate storage tanks are located. This gives the Aker Solutions’ Belly-Spar its characteristic shape.
“The Belly-Spar concept is a result of the innovative spirit and culture among our engineers, who have come up with the right solutions for the challenging conditions on the Aasta Hansteen field,” says Valborg Lundegaard, head of Engineering business area in Aker Solutions.
The mooring system for Aasta Hansteen Spar platform consists of a set of polyester lines. “There are currently no installations on the NCS with polyester mooring. Aasta Hansteen may be the first, and it will definitely be operating in the deepest water,” says Henning Østvig.
In talking with Technip the other day, they weren’t able to give us specific details on any of the features of their spar design, however it’s being designed with lessons learned from the Perdido Spar in the Gulf of Mexico, an ultra-deep water platform they designed for Shell a few years ago, while also incorporating features that will allow it to produce in the harsh weather offshore Norway.
Giving us some perspective on harsh environment design considerations for such a platform, ABS’ Director of Offshore Technology, Sudheer Chand comments:
A facility built for a harsh environment such as offshore Norway will have a number of unique features. In particular, the structural design may need to be robust enough to deal with the occasional iceflow, and the materials used must be able to maintain their strength and elasticity under very cold conditions. The machinery and working spaces, must be shielded from the weather and must be able to operate under extreme conditions. In addition, designs must be scrutinized so that water is not allowed to collect and freeze in crevices or tight spaces.
Both Technip and Aker plan to include steel catenary production risers in their designs.
The field was discovered in 1997 and lies 300km offshore in the Vøring area. The license partners are Statoil (75%), ExxonMobil (15%) and ConocoPhillips (10%). Together with Haklang and Snefrid South, it is estimated to contain recoverable gas reserves of 40-60 billion standard cubic metres (scm).
By Vera Eckert (Reuters) – Container shipping firm Hapag-Lloyd said surging demand for bulky goods like exercise equipment from locked-down consumers may flatten out in the second or early third quarter,...
By Jacob Gronholt-Pedersen (Reuters) – Shipping group Maersk ($AMKBY) said on Wednesday it would accelerate plans to decarbonize sea-borne container shipping by putting the world’s first vessel powered by carbon-neutral...
By Isla Binnie (Reuters) – For the next four months, robotic submersible vehicles will swim the frigid, choppy waters around South Georgia island, gathering evidence to determine whether a massive...
February 17, 2021
Total Views: 2620
Sign Up Now for gCaptain Daily
Just enter your email and get hot news every morning
We use cookies on our website to give you the most relevant experience. By clicking “Accept”, you consent to the use of ALL the cookies.
This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.