A fully integrated geophysical and geological study of the Brazilian Margin

With coverage of all offshore blocks in the 14th Brazil licensing round, the Brazil Atlantic Margin SEEBASE® Study and GIS documents the structural evolution of the offshore basins of Brazil from the Foz do Amazonas Basin in the north to the Santos Basin in the south. Key outcomes of the study are an updated view of basement architecture and basin evolution, improved constraints on known petroleum systems and new exploration concepts for generating new plays and leads.

The study has improved insights into basement control on basin geometry, and the spatial distribution of the world-class Brazilian Cretaceous source rocks and hydrocarbon maturity in relation to the opening of the Atlantic margin.

SEEBASE is the first-step in a screening process for hydrocarbon potential in offshore Brazil and provides significant new insights into the petroleum potential and exploration risks – especially in areas where it is difficult to image the deeper parts of the basins with seismic.

This multi-client product is highly suitable to plan for acquisition of high cost seismic data in the 14th licensing round.

3D image of the Brazil Atlantic Margin depth-to-basement SEEBASE showing the Outer High of the Santos Basin, part of the Southern São Paulo Plateau.

3D image of the Brazil Atlantic Margin depth-to-basement SEEBASE showing the Outer High of the Santos Basin, part of the Southern São Paulo Plateau.

Identify new potential and recognise risk, paving the way for targeted exploration 

Brazil Atlantic Margin SEEBASE – showing the Project Area of Interest in blue, and coverage of license blocks available from Brazil’s 14th License Bidding Round in white. 

Brazil Atlantic Margin SEEBASE – showing the Project Area of Interest in blue, and coverage of license blocks available from Brazil’s 14th License Bidding Round in white. 

The Brazil Atlantic Margin SEEBASE Study and GIS provides an integrated geophysical and geological study of basement and basin evolution, including a hand-contoured 3D model of depth, and geometry of the basement surface.

The study has generated new insights and further improved our knowledge and understanding of Brazil’s mature Atlantic margin:

  • The new regional depth-to-basement grid (SEEBASE) highlights the variations in structural style and response to deformation along the Brazilian margin during the opening of the Atlantic.
     
  • A series of syn-rift, lacustrine, potential source pods formed at different times during the Cretaceous, and have been interpreted along sections of the Brazilian margin.
     
  • A qualitative, first-pass assessment of pseudo-maturity along the Brazilian margin indicates regions that may be hydrocarbon-mature.
     
  • Improvements to the location and distribution of intra-basinal features, i.e. salt and volcanics, complement currently publicly available datasets.
     
  • Some basins have been identified as having higher exploration risk, due to those basins experiencing late syn-rift hyperextension and mantle exhumation, with uncertain implications and impacts on their petroleum systems.

Comprehensive study deliverables

Included in the Brazil Atlantic Margin SEEBASE Study and GIS product is a comprehensive 158 page digital (print-ready) report and a project-ready ArcGIS data package, covering:

  • Basement Geology: Analysis and description of basement terranes including the limit of oceanic crust, assessment of terrane boundaries and interpretation of basement composition, including the complex basement geology at depth in the attenuated zones.
  • Tectonostratigraphic History: Plate reconstruction model of the South Atlantic and summary of key tectonic events; implications for basin development; interpretation of major basement faults.
  • Tectonic Events: Key events and associated kinematics that controlled the structural evolution of the basins.
  • Depth-to-Basement - SEEBASE: 3D geometry and depth of the basement surface highlighting basin depocentres and highs.
  • Depth to Moho: 3D geometry and depth of the Moho surface.
  • Maps of sediment, crustal and basement thickness, and Beta factor: Derivative maps created using the SEEBASE™ and Moho models.
  • Basin Summaries: Summaries of key basin information and observations from potential field data
  • Potential Field Datasets: FROGTECH Geoscience's state-of-the-art geophysical processing and enhancements.
  • Detailed referencing: Comprehensive references included.  
 
Brazil Atlantic Margin SEEBASE ArcGIS includes project-ready geo-referenced, integrated datasets that can be optionally further calibrated with client data ensuring improved insights and new ideas on basin architecture and evolution, as well as a better understanding of the extent of known and new depocentres.

Brazil Atlantic Margin SEEBASE ArcGIS includes project-ready geo-referenced, integrated datasets that can be optionally further calibrated with client data ensuring improved insights and new ideas on basin architecture and evolution, as well as a better understanding of the extent of known and new depocentres.

Integrated, project ready and insightful

Each SEEBASE study is designed to be project-ready. The Brazil Atlantic Margin SEEBASE Study and GIS is supplied as a fully integrated geophysical and geological study of basement and basin evolution of the offshore Brazil region at a regional scale using public domain datasets enhanced using FROGTECH Geoscience proprietary processing. The SEEBASE model of the 3D depth and geometry of the basement surface provides a new view of basement architecture, and identifies new lacustrine depocentres. The study also presents a regional tectonic synthesis and interpretation that includes descriptions of basement terranes, FROGTECH Geoscience plate reconstruction models, detailed fault event maps and associated basin response maps.

Brazil Atlantic Margin SEEBASE utilises FROGTECH Geoscience’s proprietary enhancement of core non-seismic geophysical datasets including Gravity (above), magnetics, and DEM.

Brazil Atlantic Margin SEEBASE utilises FROGTECH Geoscience’s proprietary enhancement of core non-seismic geophysical datasets including Gravity (above), magnetics, and DEM.

The integrated evaluation of the SEEBASE surface and accompanying Moho model highlights both the regional crustal architecture and variations in crustal thickness at a much higher resolution than available from published crustal models. These centre-piece features, along with other deliverables, make the Brazil Atlantic Margin SEEBASE Study and GIS product a cost-effective regional evaluation tool that gives a good regional understanding of the geology and regional hydrocarbon prospectivity of the Brazil Atlantic margin, providing a basis for focusing future exploration and data acquisition strategies to reduce exploration risk and underpin further petroleum systems analysis and development of new play concepts.

SEEBASE Brazil Atlantic Margin CORE Benefits

  • Leverage the hand-contoured SEEBASE model to understand depth to crystalline basement, rather than an automated magnetic “basement” grid (which may pick up intra-basinal features such as the Cretaceous volcanics and salt).
  • Coverage of the entire Brazilian Atlantic margin, highlight the variations in structural styles and responses to deformation during separation of South America and Africa.
  • Use the basement interpretation to identify new Early Cretaceous lacustrine depocentres, and assist development of new play concepts.
  • Identify potential for undiscovered hydrocarbons including the relationship between known hydrocarbon fields and basement evolution, and basement control on fluid migration to predict potential unidentified fluid accumulations.
  • Identify which basins and regions are prone to greater exploration risk based on new insights in basement evolution, hyperextension and mantle exhumation along the Brazilian margin.
  • Highlights limitations of publicly available datasets and benefits of integration with proprietary exploration datasets.
Basement-controlled fluid focus models represent possible buoyancy driven fluid migration over present-day basement.

Basement-controlled fluid focus models represent possible buoyancy driven fluid migration over present-day basement.

Detailed plate reconstructions, at key tectonic events, provide clear and concise summaries of regional settings during the separation of South America and Africa.

Detailed plate reconstructions, at key tectonic events, provide clear and concise summaries of regional settings during the separation of South America and Africa.