A knowledge database of hanging-wall traps that are dependent on fault-rock seal
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VIEW DISCUSSIONPublication: Geological Society, London, Special Publications
Volume 496
Pages 209 - 222
Abstract
Hanging-wall traps are successful trapping styles with discoveries made in many sedimentary basins worldwide. Examples of hanging-wall traps are documented in the literature but very few describe the role played by fault-rock seal on trap integrity. This contribution focuses on hanging-wall traps that are dependent on fault-rock seal. Analysis of 18 examples of hanging-wall traps has revealed that the hydrocarbon column height trapped by fault-rock seal is typically less than 190 m. Cross-plots of shale gouge ratio (SGR) and buoyancy pressure from hanging-wall traps have a similar data distribution to published SGR–buoyancy pressure calibration plots. The similarity in data distribution indicates a similarity in the overall fault-sealing mechanism: namely, the capillary fault sealing through the incorporation of clay/shale material into the fault zone. Published ‘global’ calibration plots of SGR v. buoyancy pressure can be used to evaluate the sealing or non-sealing risk of hanging-wall traps in the same manner as for footwall traps.
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Funding
This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.
Author contributions
PGB: Formal Analysis (Lead), Methodology (Lead), Writing – Original Draft (Lead); GY: Methodology (Equal), Writing – Review & Editing (Equal); ES: Conceptualization (Equal), Writing – Review & Editing (Supporting).
Information & Authors
Information
Published In
Geological Society, London, Special Publications
Volume 496 • 2020
Pages: 209 - 222
Copyright
© 2019 The Author(s). Published by The Geological Society of London. All rights reserved.
History
Received: 10 September 2018
Revision received: 5 February 2019
Accepted: 5 February 2019
Published online: 27 September 2019
Published: 2020
Authors
Author Contributions
PGB: Formal Analysis (Lead), Methodology (Lead), Writing – Original Draft (Lead); GY: Methodology (Equal), Writing – Review & Editing (Equal); ES: Conceptualization (Equal), Writing – Review & Editing (Supporting).
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- Yazhou Liu, Jianhui Zeng, Juncheng Qiao, Dongxia Chen, Shengqian Li, Yuyang Dong, Shu'ning Liu, Hui Long, Integration of charging time, migration pathways and sealing analysis to understand hydrocarbon accumulation in complex fault blocks, the Pinghu Slope Belt of the Xihu Depression, East China Sea Basin, Marine and Petroleum Geology, 10.1016/j.marpetgeo.2023.106241, 152, (106241), (2023).
- Peter Bretan, Assessing the predictive capability of the empirical Shale Gouge Ratio–buoyancy pressure calibration: implications for estimating CO2 column heights, Geological Society, London, Special Publications, 10.1144/SP528-2022-32, 528, 1, (395-414), (2022).
- Peter G. Bretan, Graham Yielding, Einar Sverdrup, Reply to Discussion on ‘A knowledge database of hanging-wall traps that are dependent on fault-rock seal’, Geological Society, London, Special Publication, 496, 209–222, https://doi.org/10.1144/SP496-2018-157, Petroleum Geoscience, 10.1144/petgeo2020-101, 27, 1, (2020).
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