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Exploration and Prospects of the Urabá Basin in Colombia

This document provides an overview of the Urabá Basin in Colombia, including regional tectonic framework, well data, and seismic lines. It discusses potential reservoirs, seals, and prospectivity, as well as the presence of structural and stratigraphic traps. The conclusion highlights the need for further geochemical analysis and characterization of source rocks.

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Exploration and Prospects of the Urabá Basin in Colombia

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  1. for hydrocarbons

  2. OPEN ROUND COLOMBIA 2010 URABA AREA January, 2010

  3. Urabá Area Urabá Blocks Basin data

  4. Regional Tectonic Framework 1629-1X Necocli-1 Apartado-1 Chigorodo-1

  5. Overview Urabá Basin Apartado -1 Well Chigorodo -1 Well AGENCIA NACIONAL DE HIDROCARBUROS

  6. General Surface Geology Necoclí -1 Apartadó -1 Chigorodó-1 Uraba Basin suggested geologic column. Modified from Fllinch (in Bertolini et al, 2003) based on the description provided by ECOPETROL, 1982a. Faults and structural lineaments by accumulated number rose diagram

  7. Petroleum Geology Stratigraphic Columns Chigorodó-1 Well Apartadó-1 Well Seal Rock Source Rock Reservoir Rock

  8. Wells and Seismic Lines Uraba Basin 1629-1X Necoclí -1 Apartadó -1 Turbo-1 Chigorodó -1 Urabá-1 LEGEND Wells ___Seismic line

  9. Bouguer Anomaly Map LEGEND ___ ContourInterval (20 mGal)

  10. Representative Seismic Urabá Basin Seismic line 79-18

  11. Representative Seismic Urabá Basin Seismic line 79-18-5

  12. Representative Seismic Urabá Basin Seismic line 13-5

  13. Seismic Structural Interpretation

  14. Organic Geochemistry Necoclí -1 Well MIOCENE Source Rock Quality ThermalMaturity

  15. Prospectivity The wells drilled allow identifying several sandstone intervals in the sedimentary sequence, which could be reservoirs. The claystones interbedded in the sequence could act as local/regional seals. Normal faults create structural-stratigraphic traps by onlap/juxtaposition against the basement, and to the W-SW stratigraphic traps by onlapping on the basement. In the eastern margin of the basin the development of compressional folds close to the Uramita Fault are observed.

  16. Conclusions • The geochemical information (Necocli-1 well) is insufficient to corroborate or rule out the existence of proper conditions for hydrocarbons generation in the basin. It is also not possible to characterize any of the informal stratigraphic units as potential source rock. • Regarding the reservoirs, the wells information shows the deposit of sandstones interbedded with claystones and siltstones along all the drilled sequence in the Apartado-1 and Chigorodo-1 wells. This implies that practically all the units in the basin could be potential reservoirs. • Regarding the plays in the area, the seismic information indicates that the basin is tilted to the northeast and has flexural geometry. This flexure causes the development of normal faults that generate structural highs against which the sediments in the basin are truncated/onlapped, especially the deepest units (Units C and D). Due to the progressive basement’s shallowing towards the southwest; the more recent sediments overlap or pinch out against the basement in that direction creating potential stratigraphic traps.

  17. Universidad Nacional de Colombia Work Team Germán Vargas Cuervo Msc - Ph. D. Project Manager Luis Castillo lópez Msc - Ph. D. Roberto Aguilera Consultant Geologist Diana M. Jiménez ANH Supervisor

  18. www.anh.gov.co

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