Abstract
ObjectivesTo investigate why episodes of pregnancy identified from electronic health records may be incomplete or conflicting (overlapping), and provide guidance on how to handle them.SettingPregnancy Register generated from the Clinical...
Highlights
A new, longer offset 3D dataset was acquired in 1999 to replace the original pre-development 1986 3D seismic volume
A revised interpretation of the crestal portion of the Judy structure was completed. This new interpretation was coupled with the results from a detailed review of the geochemical, pressure and fault seal data, to create a petroleum charge model which accounted for the variations in fluid types and contacts throughout the field and identified three fault blocks (30/7a-P16, P17 and P18) in the crestal portion of the field for infill drilling
The Judy Field consists of a series of tilted pre-Cretaceous fault blocks, which contain hydrocarbons in the Upper Jurassic Fulmar Formation and the Joanne and Judy Sandstone Members of the Triassic Skagerrak Formation
Summary
Of the Skagerrak Formation (Goldsmith et al 1995) (Fig. 3). Hydrocarbons have been discovered in the Upper Jurassic Fulmar Formation but are volumetrically insignificant since this interval is thin and laterally discontinuous. The channel sandstones are interpreted to represent the deposits of ephemeral fluvial channels and, each of the finingupward sequences may represent a single flood event characterized by incision and filling of a shallow, low sinuosity channel (Tunbridge 1984; Olsen 1987; Sadler & Kelly 1993) They exhibit the best reservoir quality, with an arithmetic mean helium porosity of 27% at ambient conditions and horizontal air permeability (Kh) of 1100 mD (Fig. 4). Lacustrine mudstones comprise argillaceous and micaceous sediments which are interpreted to have been deposited at the margins of desert lakes or on the interfluves of the channels They have the lowest average porosity and Kh but can be as high as the argillaceous sandstone since they grade laterally into that facies association (Fig. 4).
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