Palynostratigraphical principles as applied in the Jurassic of the Troll and Draugen Fields, offshore Norway

  • C. J. van der Zwan
Conference paper


While palynostratigraphy has been applied to all Norske Shell’s exploration wells since the early 1960s, the discovery of the Troll and Draugen fields led to a new phase in palynological applications, with palynology being extensively used in the determination of the reservoir units. Examples of such applications illustrate the following: (1) in the Upper Jurassic Sognefjord Formation in the Troll Field, how integration of palynostratigraphy with event stratigraphy based on blade-shaped opaque palynodebris and on lignite has helped to solve correlation problems; (2) in the Upper Jurassic of both the Troll and Draugen fields, how problems related to reworking have been avoided by preferentially using base occurrences of taxa, even though the relative abundance of the reworked assemblage would initially suggest otherwise; (3) in the Upper Jurassic of the Draugen Field, how palynofacies has helped to determine various sub-environments in the offshore bar sands of the Rogn Formation. The preferential use of base-occurrences in zonation is both theoretically and practically a better approach to biostratigraphic correlation.


Seismic Stratigraphy Palynological Assemblage Reservoir Unit Biostratigraphic Correlation Event Stratigraphy 
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Copyright information

© Norwegian Petroleum Society 1989

Authors and Affiliations

  • C. J. van der Zwan
    • 1
  1. 1.A/S Norske ShellRisavikaNorway

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