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

Journal Article · Sat Jun 01 00:00:00 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), Vol. 6:3
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
NORTH SEA
PETROLEUM DEPOSITS
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DISTRIBUTION
EXPLORATION
FOSSILS
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GEOLOGIC HISTORY
GEOLOGIC MODELS
JURASSIC PERIOD
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RESERVOIR ROCK
STRATIGRAPHY
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DEVELOPED COUNTRIES
EUROPE
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020200* - Petroleum- Reserves
Geology
& Exploration