Kacewicz, Marek¹, Mark Filewicz², Chip Morgan², Yusri Yusri³ Mark Andreason², Gregg Blake², Frank Bilotti¹, Tom Elliott¹, Joe Curiale¹, Elizabeth Johnson¹, Russell Davies⁴, Henry Lickorish⁴ 
(1) Unocal Corporation, Sugar Land, TX 
(2) Unocal Corp, Houston, TX 
(3) Unocal Indonesia Co, Indonesia
(4) Rock Deformation Research, 

ABSTRACT: 3D Petroleum Systems Modeling Offshore Brazil – From Regional to Prospect Scale Hydrocarbon Generation and Migration

Evaluation of the hydrocarbon potential in Deep-water Campos and Espirito Santo Basins, offshore southeast Brazil, was significantly improved with an integrated 3-D basin analysis. The analysis provided regional maturity trends, primary migration focus areas and highlighted both regional and sub-regional (lease block) areas of interest. Regional interpretation of well data and depositional patterns along with 2-D/3-D seismic mapping of key chronostratigraphic horizons provided the structural framework necessary to build a 3-D basin model in Petromod3D. Regional heat flow was calculated based on 2-D gravity and magnetic interpretations as well as temperature measurements at well locations. Vitrinite reflectance (VR) and hydrocarbon composition data were used for calibrating the model maturity. Finally, integration of basin restorations, which leveraged the most probable salt kinematic solutions and seismic stratigraphy, allowed a 3-D interpretation of maturity and fluid flow at the lease block scale. Rigorous integration of all data provided a detailed 3-D petroleum system model which helped assign risk at both the lead and prospect level.

AAPG Search and Discovery Article #90026©2004 AAPG Annual Meeting, Dallas, Texas, April 18-21, 2004.