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(A) Gamma-ray, core-lithology, and permeability profiles for two wells (4 and 5) in Murdoch field, North Sea. Also shown are initial gas-flow rates. Conglomerates in well #4 have high permeabilities and good gas flow rates, whereas conglomerates in well #5 have poor permeability and low flow rates. (B) Core of conglomerate with high permeability. (C) Core piece of conglomerate with poor permeability. The reddish color of the conglomerate in (C) is due to the presence of reddish shale clasts, which are not present in the conglomerate in (B).
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