| Autor: |
Chris Davies, Phillip Trussell, Tim P. Moulds, David J. Cox, Demet Erbas, Ewan D. Laws, Neil Strachan |
| Rok vydání: |
2010 |
| Předmět: |
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| Zdroj: |
All Days. |
| DOI: |
10.2118/134953-ms |
| Popis: |
Magnus is a high productivity oil field in the northern North Sea. First oil was produced in 1983 and the plateau of 150 MSTB/D ended in 1995. In the post-plateau period a variety of reservoir management techniques have been employed to arrest decline rate. Two major projects have been executed post-plateau: in 2002 a gas injection EOR scheme was initiated and more recently additional drilling slots were added to the platform to increase reservoir access. These major projects have rejuvenated the field development options and will enable significant oil production beyond the next decade. The EOR scheme exemplifies the synergies that are important to continuing to extract value in a mature oil province. The gas that is injected is sourced from several other fields and provides an export route for associated gas that would otherwise be stranded. After seven years of operation the impact of the EOR scheme is readily quantified, as are the challenges inherent in operating such a scheme. This paper describes the reservoir performance of EOR, discusses observations that may impact gas relative permeability under WAG operation, describes the tools that have supported reservoir management decisions and considers the operational issues that continually challenge delivery and the surveillance approach taken to mitigate these. The extended slots project used slot-splitter technology to increase the number of wells. Wells from the new slots are now the longest wells that have been drilled from the platform enabling recovery from targets at the periphery of the field. The combination of EOR and additional slots has generated a position where the field is once again opportunity-rich. Together with technology developments in 4D seismic and revised geological description a new tranche of opportunities are being identified that combine initially dry oil attic targets along with the underpinning volumes from EOR delivery. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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