The petroliferous offshore Sergipe Basin in Brazil has attracted exploratory efforts for oil and gas for a long time since the first discoveries were made there in the late 20th century. Recently, new giant discoveries have been made, located in the deep and ultra-deep-water region of the basin. This has naturally raised renewed interest in the industry in the petroleum systems being active in the Sergipe basin.

Being at the heart of technology-driven de-risking of exploration targets from basin to prospect scale, Petroleum Systems Modelling (PSM) has become an indispensable tool in the course of any exploration project worldwide. Application of PSM in such projects is a basic standard today, enabling improved insight into the processes active in petroleum systems, including a better understanding of source rock maturation and timing, charge volumes, migration, as well as mixing of hydrocarbons of diverse origin.

Brazil Petro Studies, commanding the largest data set worldwide of multiclient PSM studies of Brazilian basins, offers to set up an entirely new, full 3D PSM study of the offshore area of Sergipe in the Sergipe-Alagoas Basin. This new PSM study will not only benefit from the regional, detailed expertise of the Brazilpetrostudies exploration team, not only concerning general G&G, geochemistry, and PSM, but also from the latest developments in the software (e.g., local grid refinement, seismic facies), and in computational power. Thus, the study will provide state-of-the-art modelling, incorporating the entirety of available data and knowledge in order to create a maximum-resolution, fully detailed and highly accurate 3D model of the Sergipe Basin. The model may serve as a dynamic decision-tool for potential future acquisitions, exploration, well planning, as well as a starting point for any further investigation.

The recent giant discoveries in the deep offshore Sergipe basin have been made in Upper Cretaceous and Tertiary turbidite reservoirs. The oils are currently believed to be sourced from marine-anoxic, organic-rich sediments of Albian-Cenomanian age. However, an origin from Cenomanian-Turonian deposits cannot be excluded to date. The study will specifically address such open questions and be backed-up by extensive side-line investigations, not only utilizing geochemical methods. Special focus will also be laid on facies distribution of sources, carriers, reservoirs and seals, as partly determined by paleo-geography and-topography, but also by locations and directions of sedimentary input, etc. Accurate modelling of these processes and parameters will be of crucial importance in order to successfully model the known hydrocarbon distribution within the basin and to obtain valid predictions of petroleum, which is yet-to-find. Based on the geochemical expertise of the Brazilpetrostudies team, maturation and resultant charge timing will be modelled with high accuracy in order to understand the history of the petroleum systems active in the basin.

1. Oil Slick Satellite Data
2. Seismic Interpretation (10.000 km of 3D seismic)
3. Calibration with 101 wells with all geological data
4. Calibration of the source rock system using 35 Wells
5. Advanced geochemical calibration data using 79 oil samples
6. Seismic surface structural and fault Maps in Time and Depth
7. Source and thermal evolution (maturity) Maps
8. Hydrocarbon Distribution Maps
9. Pore pressure data
10. High Resolution Geochemical oil and gas analyses
11. Petroleum System Modeling including calibration of temperature, maturation, generation, migration and preservation data, hydrocarbon types and oil families, and its vertical and horizontal distributions.

1. Data of the 3D Seismic Interpretation
   1. Mapped seismic surfaces in depth and time
   2. Digital model provided in Petromod Format
   3. Gridded surface in depth used for modeling
2. The model includes
   1. Geological and Geochemical Data
      1. Conceptual model including a spatial distribution of source rocks, reservoirs and seals Reservoir and source rocks facies distributions
      2. Source rocks families and characteristics
      3. Spatial (vertical and horizontal) distribution, quality and maturity of the source rock systems Kinetic reactions used
      4. High resolution and advanced geochemical analyses of oil, gases and source rocks organic extracts
      5. Oil & source rock correlation and identification and characterization of oil and source rock systems
   2. Petroleum System Modeling
      1. 3D assessment of hydrocarbon migration over geological time
      2. Time of hydrocarbon charge
      3. Risk assessment for defined plays and leads (the potential of structural and stratigraphic traps will be quantified and evaluated)
      4. Heat Flow history maps
      5. 3D maturity and burial history plots and maps
      6. Temperature maps of main reservoir layers
      7. Diagrams of thermal and maturity calibration data
      8. Hydrocarbon generation, expulsion, and transformation ratio maps
      9. 3D phase, volumes and quality, including mass balance for the entire model
      10. Pore pressure prediction maps
      11. Oil and gas accumulations potential with AVOs and DHIs identifications
   3. Biodegradation risks