Agencia Nacional De Hidrocarburos website; the Columbian government licencing agency for oil & gas exploration blocks:
http://www.anh.gov.co/es/index.php
A map of the oil & gas exploration Blocks in Columbia:
http://www.anh.gov.co/media/asignaci...
I have place both of these on the Link Library page in the left hand column for reference.
Best Wishes; Scott