Great Campos

Petroleum System Evaluation of The Great Campos Basin Offshore Southeastern Brazil
Focused on Areas Offered During ANP Bid Rounds

GEOCHEMICAL SOLUTIONS INTERNATIONAL INC. (GSI) has conducted a detailed investigation of exploration cells in the Great Campos Basin to be offered in the upcoming Agencia National Petroleo (ANP) bid Round 9. This risk assessment study was accomplished by integrating all available geochemical and geophysical data (from GETECH/DIGS SAMBA study) within a geologic framework constrained by stratigraphic grids developed from Western Geco’s 1999- 2000 2D seismic data.

The geochemical data includes remote sensing, heat flow and basin modeling results, and analytical data from more than thirteen-hundred (1300) piston cores acquired in water depths ranging from 100 m up to 3,000 m and more than three-hundred (300) crude oils. In addition, source rock data was obtained by screening approximately 9,000 potential source rock samples representing more than 135,000 m of section from more than 60 wells; a subset approximately two hundred and fifty (250) well cuttings and/or core samples displaying the best source potential were analyzed in detail.

Basin modeling, which has become an essential tool for petroleum exploration, was accomplished through use of Trinity software developed by Zetaware. It allows the explorationist an integrated, dynamic means by which to simulate basin evolution and petroleum generation, expulsion and migration. It also provides insights into fundamental questions such as: 1) where are the source rock “kitchens”? 2) what is the timing of petroleum generation, expulsion and migration for each source rock interval? 3) what are possible migration pathways from source rocks to reservoirs? 4) what is the significance of faults as migration pathways? 5) how effective must drains and seals be in order to have commercial accumulations? and 6) what are the expected oil and gas compositions in a hydrocarbon trap?