The turret is part of a mooring system designed to ensure Prelude FLNG can operate safely in the most extreme weather conditions. At almost 100 metres high, it is the largest in the world. The turret will run through the front of the facility and connect to giant chains that will keep it moored securely over the Prelude gas field. The turret mooring system will allow the facility to turn slowly in the wind and with currents – ensuring it can remain safely at its location through the most powerful cyclones. 

“Prelude FLNG combines our many years of experience in shipping and in managing complex LNG and offshore projects. It’s great to see our innovative designs and technologies become a reality as we reach significant project milestones like this,” Matthias Bichsel, Projects & Technology Director at Shell said.

“Designed in Monaco, built in Dubai, shipped to South Korea and for use off Australia, the turret is an example of the truly global nature of this project.”

Shell was the first company to commit to an FLNG project, and it expects Prelude FLNG to be the first of many such Shell facilities.

Once complete, Prelude FLNG will operate in a remote basin around 200 kilometres off Australia’s north-west coast, for around 25 years. It will produce about 3.6 million tonnes of LNG a year to help meet rising global demand for cleaner energy.

After the first 25-year assignment, Prelude FLNG could be refurbished and moved to a different field for another quarter century.

FLNG will allow Shell to produce natural gas at sea, cool it onboard into LNG, and pump it directly into ships that will transport it to customers around the world. It can mean faster, cheaper and more flexible development of offshore gas fields that would otherwise be too costly to develop.


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Prelude FLNG Turret Facts and Figures

  • This part of the turret weighs 4,300 tonnes.
  • The turret’s swivel design enables the facility to ‘weather vane’ by allowing the hull of the facility to rotate according to the prevailing wind, waves or current, while the turret moorings remain fixed to the sea floor.
  • The turret structure has been designed to enable the FLNG facility resist the most extreme weather conditions, including category five cyclones, and the facility will remain on location in all conditions.
  • The mooring system includes four groups of four mooring lines, sixteen in total, that will secure the facility to anchor points about 250 metres below the surface of the sea.
  • The mooring lines are a combination of chains and wire. These connect the turret mooring system to the 62.5 metre long and 5.5 metre diameter anchor piles secured to the seabed.
  • The mooring chain links, about one metre in length and among the largest in the world, are being made in Spain. 
  • The chain connectors that will link the Prelude FLNG substructure to its mooring lines are designed to withstand the breaking load of the largest type of offshore chains and to operate for 25 years.
  • The subsea connections that extract and control the flow of gas from the reservoir also connect via the turret. The turret was designed by SBM Offshore in Monaco and construction has been underway at Dubai DryDocks World since 2012.

Prelude FLNG Background

  • Prelude FLNG is a natural gas project located approximately 475km north-north east of Broome in Western Australia.
  • Shell is the operator of Prelude FLNG in joint venture with INPEX (17.5%), KOGAS (10%) and OPIC (5%) and working with long-term strategic partners Technip and Samsung Heavy Industries (the Technip Samsung Consortium).
  • The project will be the first to use Shell’s revolutionary Floating Liquefied Natural Gas technology, which allows for natural gas to be extracted, processed, stored and transferred at sea.
  • FLNG removes the need for pipelines to shore, dredging and onshore works and therefore significantly limits the disturbance to the surrounding environment and reduces development costs.
  • Shell FLNG can be deployed in a range of field development scenarios, with high production rates and with a wide range of gas compositions.
  • Shell was the first to make FLNG a reality. In May 2011, Shell announced final investment decision on Prelude FLNG.
  • Once operating, the Prelude FLNG facility will produce 3.6 million tonnes per annum (mtpa) of LNG, 1.3 mtpa of condensate and 0.4 mtpa of LPG.
  • The Prelude FLNG facility will be 488 metres long and 74 meters wide. It will weigh more than 600,000 tonnes with the cargo tanks full.
  • The FLNG design has gone through extensive testing programs and simulations to ensure it has the ability to remain connected and moored to the sea floor throughout all weather conditions.

For more information about Prelude FLNG visit:

Cautionary Note

The companies in which Royal Dutch Shell plc directly and indirectly owns investments are separate entities. In this release “Shell”, “Shell group” and “Royal Dutch Shell” are sometimes used for convenience where references are made to Royal Dutch Shell plc and its subsidiaries in general. Likewise, the words “we”, “us” and “our” are also used to refer to subsidiaries in general or to those who work for them.

These expressions are also used where no useful purpose is served by identifying the particular company or companies. ‘‘Subsidiaries’’, “Shell subsidiaries” and “Shell companies” as used in this release refer to companies over which Royal Dutch Shell plc either directly or indirectly has control. Companies over which Shell has joint control are generally referred to “joint ventures” and companies over which Shell has significant influence but neither control nor joint control are referred to as “associates”.

In this release, joint ventures and associates may also be referred to as “equity-accounted investments”. The term “Shell interest” is used for convenience to indicate the direct and/or indirect ownership interest held by Shell in a venture, partnership or company, after exclusion of all third-party interest.

This release contains forward-looking statements concerning the financial condition, results of operations and businesses of Royal Dutch Shell. All statements other than statements of historical fact are, or may be deemed to be, forward-looking statements. Forward-looking statements are statements of future expectations that are based on management’s current expectations and assumptions and involve known and unknown risks and uncertainties that could cause actual results, performance or events to differ materially from those expressed or implied in these statements.

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There are a number of factors that could affect the future operations of Royal Dutch Shell and could cause those results to differ materially from those expressed in the forward-looking statements included in this release, including (without limitation): (a) price fluctuations in crude oil and natural gas; (b) changes in demand for Shell’s products; (c) currency fluctuations; (d) drilling and production results; (e) reserves estimates; (f) loss of market share and industry competition;

(g) environmental and physical risks; (h) risks associated with the identification of suitable potential acquisition properties and targets, and successful negotiation and completion of such transactions; (i) the risk of doing business in developing countries and countries subject to international sanctions; (j) legislative, fiscal and regulatory developments including regulatory measures addressing climate change;

(k) economic and financial market conditions in various countries and regions; (l) political risks, including the risks of expropriation and renegotiation of the terms of contracts with governmental entities, delays or advancements in the approval of projects and delays in the reimbursement for shared costs; and (m) changes in trading conditions.

All forward-looking statements contained in this release are expressly qualified in their entirety by the cautionary statements contained or referred to in this section. Readers should not place undue reliance on forward-looking statements. Additional risk factors that may affect future results are contained in Royal Dutch Shell’s 20-F for the year ended December 31, 2013 (available at and These risk factors also expressly qualify all forward looking statements contained in this release and should be considered by the reader.

Each forward-looking statement speaks only as of the date of this release, 14 August, 2014. Neither Royal Dutch Shell plc nor any of its subsidiaries undertake any obligation to publicly update or revise any forward-looking statement as a result of new information, future events or other information. In light of these risks, results could differ materially from those stated, implied or inferred from the forward-looking statements contained in this release.

We may have used certain terms, such as resources, in this release that United States Securities and Exchange Commission (SEC) strictly prohibits us from including in our filings with the SEC. U.S. Investors are urged to consider closely the disclosure in our Form 20-F, File No 1-32575, available on the SEC website You can also obtain these forms from the SEC by calling 1-800-SEC-0330.

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