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Book Chapter

Volund Field: development of an Eocene sandstone injection complex, offshore Norway

By
Anne M. Schwab
Anne M. Schwab
Marathon Oil Corporation, Marathon House, Rubislaw Hill, Anderson Drive, Aberdeen AB15 6FZ, UK
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Eric W. Jameson
Eric W. Jameson
Marathon Oil Corporation, Marathon House, Rubislaw Hill, Anderson Drive, Aberdeen AB15 6FZ, UK
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Ann Townsley
Ann Townsley
Marathon Oil Corporation, Marathon House, Rubislaw Hill, Anderson Drive, Aberdeen AB15 6FZ, UK
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Published:
January 01, 2015

Abstract

The Volund Field lies in the Norwegian sector of the North Sea (Quad 24/9). This field produces from a ‘classic’ large-scale sandstone injection complex located in Lower Eocene strata. The sandstone reservoir has been injected into the lower permeability surrounding mudstones of the Sele and Balder formations and Hordaland Group to create an ‘intrusive trap’. The Volund Field consists of a deeper central unit of stacked sandstone sills, surrounded by shallower, steeper-dipping injected sandstone dykes, which make excellent reservoirs with consistently high porosity and permeability. Many of the steeply-dipping injected dykes appear to have excellent connectivity from the water leg through the oil leg and into the gas cap. The complex was identified on seismic data that exhibit a Class 3 amplitude versus offset (AVO) signature on the far-offset stack reflection seismic volume. The seismic data have been used to successfully locate horizontal production wells. Volund seismic geobodies have been extracted and incorporated into the reservoir geomodel to determine the geometry of the injectite features and to populate sands within the injection complex. Volund Field (estimated mean gross resource of 54 mmboe (million barrels oil equivalent)) is producing oil from four horizontal branches (end December 2012), with one water injector well, and has a common oil–water contact and gas–oil contact.

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Contents

Geological Society, London, Special Publications

Tertiary Deep-Marine Reservoirs of the North Sea Region

T. McKie
T. McKie
Shell UK Ltd, UK
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P. T. S. Rose
P. T. S. Rose
Apache North Sea, UK
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A. J. Hartley
A. J. Hartley
University of Aberdeen, UK
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D. W. Jones
D. W. Jones
Shell UK Ltd, UK
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T. L. Armstrong
T. L. Armstrong
Talisman Sinopec Energy UK Ltd, UK
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Geological Society of London
Volume
403
ISBN electronic:
9781862396791
Publication date:
January 01, 2015

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