Formation of linear planform chimneys controlled by preferential hydrocarbon leakage and anisotropic stresses in faulted fine-grained sediments, offshore Angola

Ho, Sutieng; Hovland, Martin; Blouet, Jean-Philippe; Wetzel, Andreas; Imbert, Patrice; Carruthers, Daniel

doi:https://doi.org/10.5194/se-9-1437-2018

Articles | Volume 9, issue 6

https://doi.org/10.5194/se-9-1437-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/se-9-1437-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 9, issue 6

Research article

|

12 Dec 2018

Research article |

| 12 Dec 2018

Formation of linear planform chimneys controlled by preferential hydrocarbon leakage and anisotropic stresses in faulted fine-grained sediments, offshore Angola

Sutieng Ho, Martin Hovland, Jean-Philippe Blouet, Andreas Wetzel, Patrice Imbert, and Daniel Carruthers

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Final revised paper (published on 12 Dec 2018)
Supplement to the final revised paper
Preprint (discussion started on 17 May 2018)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Comments', Andreia Plaza-Faverola, 10 Jun 2018
- AC2: 'Part 1 - authors reply to Review 1 of the Discussion Paper titled “Formation of linear planform chimneys controlled by preferential hydrocarbon leakage and anisotropic stresses in faulted ﬁne-grained sediments, Offshore Angola” by Ho et al.', Sutieng Ho, 30 Jul 2018
- AC3: 'Part 2 - authors reply to Review 1 of the Discussion Paper titled “Formation of linear planform chimneys controlled by preferential hydrocarbon leakage and anisotropic stresses in faulted ﬁne-grained sediments, Offshore Angola” by Ho et al.', Sutieng Ho, 30 Jul 2018
RC2: 'Review', Anonymous Referee #2, 13 Jun 2018
- AC1: 'Authors reply to the Review of the Discussion Paper titled “Interactive comment on “Formation of linear planform chimneys controlled by preferential hydrocarbon leakage and anisotropic stresses in faulted ﬁne-grained sediments, Offshore Angola” Ho', Sutieng Ho, 30 Jul 2018
RC3: 'Referee report', Anonymous Referee #3, 02 Jul 2018
- AC4: 'Authors reply to Reviewer 3’s comments on the Discussion Paper titled “Interactive comment on “Formation of linear planform chimneys controlled by preferential hydrocarbon leakage and anisotropic stresses in faulted ﬁne-grained sediments, Offshore', Sutieng Ho, 31 Jul 2018

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Sutieng Ho on behalf of the Authors (30 Sep 2018) Author's response Manuscript

ED: Referee Nomination & Report Request started (02 Oct 2018) by Elias Samankassou

RR by Andreia Plaza-Faverola (02 Nov 2018)

RR by Anonymous Referee #2 (03 Nov 2018)

RR by Anonymous Referee #3 (05 Nov 2018)

ED: Publish subject to minor revisions (review by editor) (12 Nov 2018) by Elias Samankassou

AR by Sutieng Ho on behalf of the Authors (18 Nov 2018) Author's response Manuscript

ED: Publish as is (23 Nov 2018) by Elias Samankassou

ED: Publish as is (23 Nov 2018) by Elias Samankassou (Executive editor)

AR by Sutieng Ho on behalf of the Authors (26 Nov 2018)

Short summary

A newly discovered type of hydrocarbon leakage structure is investigated following the preliminary works of Ho (2013; et al. 2012, 2013, 2016): blade-shaped gas chimneys instead of classical cylindrical ones. These so-called Linear Chimneys are hydraulic fractures caused by overpressured hydrocarbon fluids breaching cover sediments along preferential directions. These directions are dictated by anisotropic stresses induced by faulting in sediments and pre-existing salt-diapiric structures.