Upper Jurassic and Basal Cretaceous Reservoirs
10 February 2015

Following discovery of the giant Buzzard Field in 2001, Nexen have discovered and delineated several additional fields with Upper Jurassic and basal Cretaceous deep-water fan and channel sandstone reservoirs developed along the western and southern margins of the Ettrick Sub-basin. Most of these have been reviewed in some detail in the United Kingdom Discovery Digest and, with much of the well data now released on the Buzzard, Golden Eagle, Hobby, Peregrine and Blackbird discoveries (along with data on earlier finds, such as Ettrick and the Solitaire discovery below the Atlantic gas/condensate field), the complex distribution of these reservoirs has now become apparent. Released well data packages, with published material on the regional geology and on the Buzzard Field itself, provide enough detail to document the distribution of and structural and depositional controls on Upper Jurassic and Lower Cretaceous reservoirs throughout the area. In this article, we provide a detailed sequenced-based review of facies distribution within the Kimmeridge Clay Formation and basal Cromer Knoll, including reservoirs sands within the Buzzard, Ettrick, Burns and Punt members.