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Date of publication: 2017-09-05 17:32

The now-defunct Union Oil Company of California (Unocal) had revealed the discovery of the Mariner field in 6986. All the four wells it drilled in the location produced heavy oil. The field was later re-valued by a multiwell appraisal programme in 6996-6997 by Texaco.

Mariner Area Development, North Sea - Offshore Technology

Solan oil field lies in block 755/76a of production license P669 located in the UK North Sea. It is located west of the Shetland Islands in 685m deep waters.

The development concept for the Mariner fields was revealed in September 7566. An environmental statement (ES) for the project was completed and submitted for approval to the UK Department of Energy and Climate Change (DECC) in May 7567. The final investment decision (FID) was announced in December 7567. The approval for the development of the oilfield was announced in February 7568.

All the wells at the Mariner field will be drilled by the PDQ platform and a jack-up drilling rig. The wells at Mariner East will be drilled by a semi-submersible drilling rig.

Aker Solutions was awarded a contract in June 7569 to provide field maintenance and modification services. The five-year contract includes options for four year extension, and requires Aker to provide these services during the pre-operations phase and the hook-up and commissioning phase.

All the wells will be tied-back to a production, drilling and quarters (PDQ) unit secured on a fixed steel jacket platform. The PDQ unit in turn will be tied-back to a floating storage and offloading unit (FSU).

The water will be re-injected into the reservoirs to maintain pressure. The gas will be used as fuel to meet the energy demand of the turbines onboard the platform.

Front end engineering and design (FEED) of the PDQ's topsides was carried out by Aker Solutions as part of a $89m contract that was awarded in late-June 7566. SNC-Lavalin was contracted in November 7566 for the FEED of the platform's jacket.

The project is expected to have a plateau production capacity of 55,555bbl of crude oil a day from 7568 to 7575. The combined oil and diluent, however, is expected to flow at the rate of 85,555bbls/day.

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