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Pre-development fracture modelling in the Clair field, west of Shetland

David Barr, Kay E. Savory, Sue R. Fowler, Kate Arman and John P. McGarrity
Geological Society, London, Special Publications, 270, 205-225, 1 January 2007, https://doi.org/10.1144/GSL.SP.2007.270.01.14
David Barr
1BP ExplorationBurnside Road, Farburn Industrial Estate, Aberdeen AB21 7PB, UK (e-mail: )
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Kay E. Savory
1BP ExplorationBurnside Road, Farburn Industrial Estate, Aberdeen AB21 7PB, UK (e-mail: )
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  • For correspondence: [email protected]
Sue R. Fowler
1BP ExplorationBurnside Road, Farburn Industrial Estate, Aberdeen AB21 7PB, UK (e-mail: )
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Kate Arman
2ConocoPhillipsRubislaw House, Anderson Drive, Aberdeen AB15 6FZ, UK
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John P. McGarrity
1BP ExplorationBurnside Road, Farburn Industrial Estate, Aberdeen AB21 7PB, UK (e-mail: )
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Abstract

The Clair oilfield is a large fractured sandstone reservoir lying 75 km west of Shetland on the UK continental shelf. Fracture analysis and modelling was carried out in preparation for the phase 1 development, which started production early in 2005. Fracture clusters and discrete fluid inflows observed in wells are associated with faults and other localized deformation features tens or hundreds of metres apart. The reservoir has moderate to good matrix permeability, but well flow rates and profiles are fracture-dominated. Full-field geological models were built using conventional object modelling approaches for matrix and discrete fracture networks for fractures, and upscaled to populate a reservoir simulation grid. Dual-porosity, dual-permeability dynamic modelling (full-field and well-test) was undertaken to understand the fracture and matrix flow contributions and their interaction. Fracture models were conditioned to wells and to seismic data, including coherency and multi-azimuthal velocity information from a four-component, ocean bottom cable three-dimensional seismic survey. At this early stage in field development, there is insufficient calibration to select a single fracture model. Instead, well and depletion plans have been tested against multiple fracture models chosen to encompass a wide range of plausible outcomes.

  • © The Geological Society of London 2007

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Geological Society, London, Special Publications: 270 (1)
Geological Society, London, Special Publications
Volume 270
2007
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Pre-development fracture modelling in the Clair field, west of Shetland

David Barr, Kay E. Savory, Sue R. Fowler, Kate Arman and John P. McGarrity
Geological Society, London, Special Publications, 270, 205-225, 1 January 2007, https://doi.org/10.1144/GSL.SP.2007.270.01.14
David Barr
1BP ExplorationBurnside Road, Farburn Industrial Estate, Aberdeen AB21 7PB, UK (e-mail: )
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • For correspondence: [email protected]
Kay E. Savory
1BP ExplorationBurnside Road, Farburn Industrial Estate, Aberdeen AB21 7PB, UK (e-mail: )
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • For correspondence: [email protected]
Sue R. Fowler
1BP ExplorationBurnside Road, Farburn Industrial Estate, Aberdeen AB21 7PB, UK (e-mail: )
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • For correspondence: [email protected]
Kate Arman
2ConocoPhillipsRubislaw House, Anderson Drive, Aberdeen AB15 6FZ, UK
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John P. McGarrity
1BP ExplorationBurnside Road, Farburn Industrial Estate, Aberdeen AB21 7PB, UK (e-mail: )
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  • For correspondence: [email protected]

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Pre-development fracture modelling in the Clair field, west of Shetland

David Barr, Kay E. Savory, Sue R. Fowler, Kate Arman and John P. McGarrity
Geological Society, London, Special Publications, 270, 205-225, 1 January 2007, https://doi.org/10.1144/GSL.SP.2007.270.01.14
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