Dickinson, 1996									Data Set 16
Reference:  Dickinson, B., 1996, The Puffin Field:  the appraisal of a complex HP-HT gas-condensate accumulation: in A. Hurst and others, ed., Geology of the Humber Group:  Central Graben and Moray Firth, UKCS, Geological Society Special Publication No. 114, p. 299-328.
Author's affiliation:  Arco British Ltd.
Age:  Late Jurassic
Formation:  Fulmar Formation, Humber Group
Location:  Puffin Field, Central Graben, North Sea, United Kingdom sector
Well:  29/5a-5
Depth:  approximately 14,300 feet.  
Depositional environment:  “shallow marine sandstones divided into four units.”  Unit 1 is the shallowest.  “Presence of marine fossils and abundant bioturbation at all horizons indicates deposition in a shallow marine environment.  The thorough bioturbation indicates relatively slow deposition, although there is evidence at some horizons of rather more rapid deposition.”
Lithology:  “The Fulmar Formation sandstones are sub-lithic arenites.  …  Original depositional texture is the principal control on permeability which reflects average grain size and amount of ductile clays.”
Unit 1:  “A fining-upward sequence of fine-to-very fine sandstone becoming increasingly argillaceous upwards, containing internal fining-up cycles.  Sedimentary structures are obliterated by pervasive bioturbation.”
Unit 2:  “ Fine to very fine sandstones with minor argillaceous content.  Internal fining-upward cycles.  Bedding better preserved than in other units and ripple cross-beds and lamination are seen.  Shell lags and/or slightly scoured bases sometimes evident.  ...”
Unit 3:  “Very fine-grained sandstones becoming less argillaceous upward and with small-scale cleaning-upward cycles.  Sedimentary structures mostly obliterated by intense bioturbation.”
Unit 4:  “Argillaceous, fine-grained to clean, medium-grained sandstones with a basal pebble lag.  The unit is overall cleaner than the base of the overlying Unit 3.”
Production:  overpressured gas condensate
Core measurement conditions:  not stated. 
Data entry:  manual entry from Figure 22C.