Ametista Block - An Unusual Prospect in Santos Basin - Albian Atoll Upon Exhumed Mantle

Pedro V. Zalan; Milos Cvetkovic; Henri Houllevigue; Kyle Reuber; Andrew Hartwig

doi:10.3997/1365-2397.fb2025022

ISSN: 0263-5046
E-ISSN: 1365-2397

Ametista Block - An Unusual Prospect in Santos Basin - Albian Atoll Upon Exhumed Mantle
Authors Pedro V. Zalan¹, Milos Cvetkovic², Henri Houllevigue², Kyle Reuber² and Andrew Hartwig²
View Affiliations Hide Affiliations

¹ ZAG Consulting ² TGS
Source: First Break, Volume 43, Issue 3, Mar 2025, p. 53 - 60
DOI: https://doi.org/10.3997/1365-2397.fb2025022
- Published online: 01 Mar 2025

Abstract

The authors present a new, distinctive prospect in the southern Santos Basin, constituted of a possible Albian atoll developed upon exhumed mantle. The prospect was identified due to the acquisition of new high-quality 3D with the latest processing techniques. The prospect shows great petroleum potential and has excellent analogs in the present Pacific atolls and on an island in the Red Sea. A large buildup composed of stratified seismic facies exhibiting basin-edge offlaps/clinoforms, and capped by a massive structureless construction, is developed upon a protrusion of exhumed mantle. This four-way closed structure is surrounded by Aptian salt bodies that onlap its flanks and by the lowermost strata of the Drift Sequence of the Santos Basin, known to be the ACT source rocks. Considering the nearby geology, this buildup is interpreted as an Albian carbonate platform capped by a reef (rudist?). An adjacent on-trend structure is constituted by volcanos developed upon the exhumed mantle. The overall structure resembles the well-known atolls of the Pacific Ocean.

EAGE Publications BV

Article metrics loading...

/content/journals/10.3997/1365-2397.fb2025022

2025-03-01

2025-03-17

From This Site

/content/journals/10.3997/1365-2397.fb2025022

dcterms_title,dcterms_subject,pub_keyword

-contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution

10

5

Full text loading...

References

Abu El-Rus, M.M.A. [2007]. Plagioclase Iherzolites from Zabargad Island, Red Sea, and their bearing on the evolution of lithospheric mantle beneath an embryonic ocean. Proceedings of the Fifth International Conference on the Geology of Africa, V-181–V-213.
[Google Scholar]
Bonatti, E., Clocchiatti, R., Colantoni, P., Gelmini, R., Marinell, G., Ottonello, G., Santacroce, R., Taviani, M., Abdel-Meguid, A.A., Assaf, H.S. and El Tahir, M.A. [1983]. Zabargad (St. John's) Island: an uplifted fragment of sub-sea Red Sea lithosphere. Journal of the Geological Society, 140(4), 677–690. https://doi.org/10.1144/gsjgs.140.40677.
[Google Scholar]
Bonatti, E., Hamlyn, P. and Ottonello, G. [1981]. Upper mantle beneath a young oceanic rift: Peridotites from the island of Zabargad (Red Sea). Geology, 9(10), 474–479. https://doi.org/10.1130/0091-7613.
[Google Scholar]
Cvetkovic, M., Yong, S.L., Johnson, T., Armentrout, D., Brookes, D., Pralica, N., Ge, L, Soelistijo, B. and Baldock, S. [2023]. The value of uplift processing in frontier exploration basins - Offshore Brazil case studies. 84th EAGE Annual Conference and Exhibition, Extended Abstracts.
[Google Scholar]
Deckelman, J.A., Chi, S., Hartwig, A.K., Reuber, K.R. and Fruehn, J. [2021]. The role of megaregional seismic data in Santos Basin pre-salt exploration and development. AAPG Memoir, 124, 487–516.
[Google Scholar]
Johnson, C.C. [2002]. The rise and fall of Rudist reefs. American Scientist, 90(2), 148–153. DOI 10.1511/2002.2.148.
https://doi.org/10.1511/2002.2.148 [Google Scholar]
Sha, J., Cestari, R. and Fabbi, F. [2020]. Paleobiogeographic distribution of rudist bivalves (Hippuritida) in the Oxfordian-early Aptian (Late Jurassic-Early Cretaceous). Cretaceous Research, 108, 104289. https://doi.Org/10.1016/j.cretres.2019.104289
[Google Scholar]
Zalan, P.V. [2024]. Remaining petroleum potential of Brazil - State of the art 2023. Derbyana, 45. htpps://doi.org/10.14295/derb.v45.826
[Google Scholar]

/content/journals/10.3997/1365-2397.fb2025022

Ametista Block - An Unusual Prospect in Santos Basin - Albian Atoll Upon Exhumed Mantle

First Break 43, 53 (2025); https://doi.org/10.3997/1365-2397.fb2025022

/content/journals/10.3997/1365-2397.fb2025022

Data & Media loading...

Article Type: Research Article

Most Cited This Month Most Cited RSS feed

- Curvature attributes and their application to 3D interpreted horizons
  
  By A. Roberts
- Distributed Acoustic Sensing – a new tool for seismic applications
  
  Authors Tom Parker, Sergey Shatalin and Mahmoud Farhadiroushan
- Effects of igneous intrusions on the petroleum system: a review
  
  Authors Kim Senger, John Millett, Sverre Planke, Kei Ogata, Christian Haug Eide, Marte Festøy, Olivier Galland and Dougal A. Jerram
- Seismic Inversion Methods and some of their constraints
  
  Authors P.C.H. Veeken and M. Da Silva
- MEMS-based accelerometers: expectations and practical achievements
  
  Authors D. Mougenot, A. Cherepovskiy and L. JunJie
- Thematic Set: Full waveform inversion: the next leap forward in imaging at Valhall
  
  Authors L. Sirgue, O.I. Barkved, J. Dellinger, J. Etgen, U. Albertin and J.H. Kommedal
- Automatic seismic prediction ahead of the tunnel boring machine
  
  Authors G. Kneib, A. Kassel and K. Lorenz
- Well log and seismic data analysis using rock physics templates
  
  Authors P. A. Avseth and E. Odegaard
- Geostatistical inversion - a sequential method of stochastic reservoir modelling constrained by seismic data
  
  Authors A. Haas and O. Dubrule
- Two-dimensional resistivity mapping with a computer-controlled array
  
  Authors D.H. Griffiths, J. Turnbull and A.I. Olayinka
More Less

Ametista Block - An Unusual Prospect in Santos Basin - Albian Atoll Upon Exhumed Mantle

Abstract

Most Read This Month

Most Cited This Month Most Cited RSS feed