Reference

Notable giant oil and gas fields discovered in the Andes basins include:

1. Cano-Limon Field: Located in Colombia, it is one of the largest onshore oil fields in South America.
2. Cusiana Field: Also in Colombia, it is a significant oil field with substantial reserves.
3. Capiagua Field: Another oil field in Colombia, contributing to the country's oil production.
4. Volcanera Field: This field is situated in the Llanos Basin and is known for its oil and gas reserves.
5. Aquaytia Field: A gas-condensate field in the western Ucayali basin, though smaller compared to others.

These fields have been instrumental in the oil and gas industry of the region. For more detailed information, you can refer to sources such as ResearchGate and GeoScienceWorld.