The Ayoluengo oil field was discovered in June 1964 by Amospain (joint venture Chevron, Texaco, Campsa).[1] It was developed by Leni Oil & Gas. It began production in 1967 and produces oil. The total proven reserves of the Ayoluengo oil field are around 104 million barrels (13.9×106tonnes), and production is centered on 225 barrels per day (35.8 m3/d).[2]

The field produced 17 million barrels of oil from 1967 to 2017, year when the concession of the field expired and a new bid was to be organized.[1] The output sometimes peaked at 5,000 barrels a day, but by 2014, it was around 100 barrels a day.[3]

The lands for the oil production were expropriated from the local inhabitants. The region did not benefit economically from the Ayoluengo oil field.[3]