Ichnofabric mapping and interpretation of Jurassic reservoir rocks of the Norwegian North Sea

Journal Article · Sat Jun 01 04:00:00 EDT 1991 · Palaois; (United States)

DOI:https://doi.org/10.2307/3514902· OSTI ID:5913996

Bockelie, J F ^[1]

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1. Norsk Hydro Exploration, Stabekk (Norway)

Recurrent sediment fabric and trace fossil associations in the Norwegian offshore Jurassic sequences have been interpreted by the ichnofabric concept. In the Sognefjord Formation (Oxfordian-Kimmeridgian) of the Troll Field five basic ichnofabrics were recognized and named after the dominant ichnogenus present, respectively: Helminthoida, Anconichnus, Palaeophycus, Ophiomorpha and Skolithos. These ichnofabrics developed in sediments deposited in marine environments ranging from quiescent offshore to high energy, shallow water nearshore situations. When sequence patterns of ichnofabrics were mapped within five chronostratigraphic reservoir zones of the Troll Field it was possible to recognize both how the frequency of a given ichnofabric may change in time in a restricted area or may change in its areal distribution in a restricted time interval. Such maps have been integrated with lithofacies maps and dip-meter studies in cored sequence to produce quantitative base maps for computerized reservoir models. The maps can also be used as a powerful tool for facies predictions.

• OSTI ID: 5913996
• Journal Information: Palaois; (United States), Journal Name: Palaois; (United States) Vol. 6:3; ISSN PALAE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
ATLANTIC OCEAN
COMPUTERIZED SIMULATION
DEVELOPED COUNTRIES
DISTRIBUTION
EUROPE
EXPLORATION
FOSSILS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
GEOLOGIC HISTORY
GEOLOGIC MODELS
GEOLOGY
JURASSIC PERIOD
MAPPING
MESOZOIC ERA
MINERAL RESOURCES
NORTH SEA
NORWAY
PALEONTOLOGY
PETROLEUM DEPOSITS
RESERVOIR ROCK
RESOURCES
SCANDINAVIA
SEAS
SIMULATION
STRATIGRAPHY
SURFACE WATERS