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The geological exploration techniques applied by BG in evaluation of the Buzzard Field prior to discovery

BG Group, 100, Thames Valley Park Drive, Reading RG6 1PT, UK

(e-mail: richard.moore{at}bg-group.com)

Substantial technical studies were undertaken by BG in the exploration effort which preceded the discovery of the Buzzard oil field. These studies were of value in forming BG’s perception of prospect risk and reward and confirming the company’s commitment to drill the prospect. Studies ranged from standard evaluation techniques to application of cutting edge technology of the time to innovative applications of software to address specific uncertainties or risks. BG perceived the prospect to be of moderate to high value, with a substantial upside reward, and since acquisition of 3D seismic to have moderate risk. This perception derived from several factors that may be peculiar to this particular prospect:

• • an existing well with an oil accumulation, located down dip, proving a migration path from oil mature source and the presence of thick sandstone units of excellent reservoir quality, logged and cored
  
• • tectonic tilting had both accentuated trap relief significantly increasing trap volume, and aided migration direction
  
• • the abundance of offset well data allowing an understanding of basin history and a robust geological model
  

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