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Volume 30, Issue 1
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Abstract

A 3D subsurface structural model was built in a zone of the Greater Bay du Nord area, Flemish Pass Basin, offshore Newfoundland and Labrador, to carry out a post-drilled, fault-seal analysis in a multi-rift, geological complex setting; this aimed to test fault-seal predictions, calibrate computed static fault-zone attributes and estimate hydrocarbon contact depths.

Hydrocarbon exploration campaigns in the Greater Bay du Nord area have primarily targeted rotated fault blocks that often exhibit structural segmentation and compartmentalization. A comprehensive approach that combines empirical and deterministic methods for static fault-seal analysis has been implemented. This approach provides insights into open, base and tight fault-seal scenarios, aiding prospect evaluation in this region. Notably, shale gouge ratios (SGRs) in the range 16–25% serve as a crucial indicator of the transition between fault-rock sealing and non-sealing fault segments. Furthermore, it emphasizes the critical role of hydrodynamics when calibrating or evaluating fault-sealing properties.

In areas like the Greater Bay du Nord region, characterized by complex geology, it is imperative to regularly update fault-seal models. These updates should align with the availability of new subsurface data, comprehensive analyses and an improved understanding of the petroleum system.

This article is part of the Fault and top seals 2022 collection available at: https://www.lyellcollection.org/topic/collections/fault-and-top-seals-2022

© 2023 Equinor ASA. Published by The Geological Society of London for GSL and EAGE. All rights reserved

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/content/journals/10.1144/petgeo2023-019
2023-12-14
2024-04-27

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Fault-seal analysis in the Greater Bay du Nord area, Flemish Pass Basin, offshore Newfoundland
Petroleum Geoscience 30, petgeo2023-019 (2024); https://doi.org/10.1144/petgeo2023-019
/content/journals/10.1144/petgeo2023-019
/content/journals/10.1144/petgeo2023-019
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