The Mariner heavy oil field lies within part-block 9/11a of the United Kingdom continental shelf
Statoil has taken an investment decision for the Mariner project, which entails a gross investment of more than USD 7 billion. The development of the Mariner field will contribute more than 250 mmbbls reserves with average production of ~55,000 bbls/d over the plateau period from 2017 to 2020 and provide a long term cash-flow with a 30 year field life. The expected date for production start is 2017.
The concept chosen includes a production, drilling and quarters (PDQ) platform based on a steel jacket, with a floating storage unit (FSU). Drilling will be carried out from the PDQ drilling rig, with a jack-up rig
assisting for the first 4 to 5 years.
More than 140 reservoir targets for production or injection are planned for Mariner. While the number of well slots at the platforms is less, this will be solved through use of multi-branch technology, side-tracks and reuse of slots.
The Mariner Field is located on the East Shetland Platform of the UK North Sea, approximately 150km east of the Shetland Isles. The Mariner oil field consists of two shallow reservoir sections – the deeper, Maureen Formation at 1492m and the shallower Heimdal reservoir at 1227m. The oil is heavy with API gravities of 14.2 and 12.1 and viscosities at reservoir conditions of 67 cP and 508 cP, respectively for Maureen and Heimdal.
The heavy oil projects have required the development of pioneering technology. Since its discovery thirty years ago, the Mariner field has been subject to a number of development studies by different operators. Statoil is the first company to put forward a development concept that will fully address the complexities of this field, in particular related to reservoir management, recovery rates and project execution.
Statoil is the operator of the field with 65.11% equity. Other partners include JX Nippon Exploration and Production (U.K.) Limited (28.89%) and Cairn Energy PLC (6%). Press release
Statoil makes investment decision for the Mariner projectPress kit – Cat J – Background for the rig concept
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