2D Petroleum System Modeling and Exploration Risk Assessment of Equatorial Margin Pará-Maranhão Basin

July 26, 2023
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Report summary

The Pará-Maranhão Basin is an Equatorial Brazilian basin that extends over an area of 48,000 km² in the offshore portion of Pará and Maranhão states. Its geological limits can be summarized as the Barreirinhas Basin (to the Southeast); the Foz do Amazonas Basin (to the Northwest); the shallow basement and Ilha de Santana Platform (to the South). Such limits are arbitrary, since there are no significant tectonic features in order to compartmentalize the mentioned Equatorial basins. The basin is a high-risk frontier of exploration for oil and gas resources. Nevertheless, the presence of at least four different active petroleum systems motivate the oil industry to go further in the investigation for oil and gas resources in this area and, once again, critically evaluate new opportunities. In order to evaluate the exploratory potential of Pará-Maranhão Basin, BPS have developed a study to rank the best areas for petroleum exploration based on the integration of different approaches and exploration tools like seismic interpretation and mapping, high-resolution geochemistry, reservoir petrophysics, tectonic, structural and stratigraphic framework reconstruction and petroleum system quantitative modeling.

Table of contents

1. Introduction
2. Regional Geology
2.1. Tectonic Evolution of the Equatorial Margin
2.2. Pará-Maranhão Structural and Stratigraphic Framework
2.3. Exploratory History
3. Petroleum System Overview through Geochemistry of Oils from Pará-
Maranhão Basin
3.1. Assessment of Oil Quality and Origin through Bulk Paramenters and Isotopic
Composition of the Oils Recovered in Pará-Maranhão Basin
3.2. N-alkane Distribution, Isoprenoid Ratios and Carbon Preferences in the
Assessment of Oil Origin and Biodegradation
3.3. Origin and Thermal Evolution Assessment of the Oils Recovered in Pará-
Maranhão Basin through its Biomarkers Distribution
3.4. Assessment of Oil Biodegradation
4. Seismic Interpretation and Geological Characteristics of the Area
4.1. Seismic Data Quality Control
4.2. Well Tying
4.3. Regional Mapping
4.4. Leads Definition
5. Stratigraphic Modeling
5.1. Quality Control of Well Data (Conversion and Standardization of Log Files)
5.2. Characterization of Potential Reservoirs
5.3. Regional Correlations
5.4. Play Fairway Mapping
6. 2D Petroleum Systems Modeling
6.1. Model Input
6.2. Calibration
6.3. P /T Modeling Results
6.4. Migration Modeling Results
6.5. Modeling Conclusions
7. Overall Conclusions
8. References

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