The Maureen Oil Platform located in Block 16/29 of the UK continental shelf, North Sea has been in operation since September, 1983.

The fields that the platform serves are now nearing the end of economic production life and the operator, Phillips Petroleum Company United Kingdom Limited and its coventurers now have to decide how to most effectively abandon and dispose of the facility.

The platform is a three tank steel gravity structure. Each of the three "legs" is a cylindrical steel oil storage tank which sits on the seabed.

The platform utility and process plant is installed on the main deck, the lower deck and on a mezzanine level. There are five decks of accommodation and office modules sited on the main deck.

The three cylindrical storage tanks are normally fully flooded with water, crude oil or a combination of both, depending on the frequency of export to the offtake tanker. The tops of the storage tanks are at an elevation of 74 m above the seabed.

The platform is unique in its design, being the only steel gravity based structure in the North Sea.

The depth of water in which the platform stands is 95.6 m at L.A.T.

The platform was floated into location, already complete, and ballasted into position. In order to meet disposal regulation and international law its most likely removal will start with the entire platform being refloated.

As a free floating mobile platform it is available for use in any other waters of the world, subject to environmental and soil conditions.

This paper will demonstrate the work that has been carried out (and is continuing) to verify the refloat and marine stability of the platform as a vessel under tow. As an alternative, methods for transporting topsides and gravity structure separately followed by remating will also be discussed.

The paper will explain the platforms' processing capabilities, its flexibility as a work base and its excellent maintenance condition.

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