Page 14: of Offshore Engineer Magazine (Mar/Apr 2015)

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Field of View

The 22,400-tonne Mariner jacket under construction at Dragados

Ofshore’s yard in Cadiz, Spain.

Constructing Mariner

Images from Statoil. the different operators. fow over a 30-year feld life. Improved

The Mariner heavy oil discovery

Since the P335 licence was awarded oil recovery together with additional near on the East Shetland Platform (1980) and the 9/11-1 discovery, fve seis- feld volumes, for example Mariner East in UK block 9/11 will be mic surveys have been acquired, a further and near feld exploration, aim to extend 18 wells have been drilled and the license the development beyond 30 years.

one of the largest ofshore has seen four changes in operator. The developments on the UK

Construction license equity history lists 12 companies

Continental Shelf in more

The load-out, transportation and instal- that have been involved in the project with lation of the 22,400-tonne jacket from up to three partners at any one time. Statoil than a decade. Meg Chesshyre

Dragados’ yard in Cadiz, Spain, in May/ assumed operatorship from Chevron in checks on its progress.

June will be one of the major milestones 2007, with partners JX Nippon joining the this year. Subsea, umbilicals, risers and group in 2012 and Dyas in 2013. onstruction for Mariner, one of Statoil is the frst company to put fowlines installation will also take place the largest recent UK North Sea forward a development concept that this year.

C Last summer, frst steel was cut on the offshore developments, is in addresses the complexities of the feld, in foating storage unit at Samsung and on the full fow. Some four different yards are particular imaging the Heimdal reservoir, 36,000-tonne platform topsides at Daewoo all producing different elements of what reservoir management, recovery rates and

Shipbuilding & Marine Engineering in will become the Mariner facilities, sit- project execution.

ting in license 335, on the East Shetland The feld develop-

Platform of the UK North Sea, approxi- ment concept includes a mately 150km east of the Shetland Isles. production, drilling and

The project is on schedule for frst oil living quarters (PDQ) in 2017, and is expected to be in pro- platform with a foating duction for more than 30 years. Mariner storage unit, together was frst identifed on 2D seismic data with a jackup rig assist- acquired in 1977, which led to Union ing initially. In total this

Oil picking up the license in 1980, and means a gross invest- drilling the 9/11-1 well in 1981, discover- ment of more than US$7 ing oil in both the Heimdal and Maureen billion for the project. sand members. The development will

Schematic of

Since Mariner was frst discovered, contribute to more than

Mariner PDQ the feld has been subject to a number 250 MMbbl reserves and and FSU.

of development studies and concepts by provide a long term cash

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