Petroleum Systems Analysis of the Eastern Colorado Basin, Offshore Northern Argentina
Published:January 01, 2000
David C. Bushnell, Jorge E. Baldi, Fernando H. Bettini, Humberto Franzin (Retired), Edward (Ned) Kovas, Raúl Marinelli (Retired), Grant J. Wartenburg, 2000. "Petroleum Systems Analysis of the Eastern Colorado Basin, Offshore Northern Argentina", Petroleum Systems of South Atlantic Margins, Marcio Rocha Mello, Barry J. Katz
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The Colorado Basin is a large (100,000-km2), deep (15,000-m) Cretaceous and Tertiary clastic sedimentary basin located offshore from southern Buenos Aires Province, Argentina. Static components of the petroleum systems—source, reservoir, seal, and overburden—are either present or can be reasonably predicted from well and seismic data. However, the best structural traps are buried beneath 7000 m of sedimentary rocks. Basin-edge stratigraphic traps are suggested in the geometry of the seismic data but are difficult to delineate stratigraphically. Exploratory drilling has so far been unsuccessful.
It is the timing of the dynamic petroleum system factors that has negatively impacted the success of the potential petroleum systems in the basin. A 4000-m Cretaceous sandstone section has pushed the most likely source rock candidate completely through the oil window before deposition of the regional seal. Any hydrocarbons that might have been expelled would have migrated vertically to the surface and been lost. Migration paths, although simple and easily delineated, tend to be dispersive near the central basin but focus on broad areas of the basin flanks.
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Petroleum Systems of South Atlantic Margins
“Giant oil and gas fields have been discovered through recent exploration in the deep and ultra-deep water regions of Angola, Brazil, and Nigeria. This volume includes 1. Descriptions of the petroleum geology of more than 12 basins along the two margins 2. Discussion of various components of the petroleum systems within these basins 3. Discussion on the use of the petroleum systems concept in the South Atlantic marginal basins to classify and characterize the diversity of the systems 4. Methodologies used in the assessment of petroleum system components 5. Overviews of the different components of the region's petroleum systems. Petroleum explorationists and researchers working in the South Atlantic will welcome this addition to their libraries.
The printed version of Memoir 73 was the Winner of the 2000 Dott Award for best AAPG Special Publication.”