March 27 2017

Amerisur Resources Plc ("Amerisur" or the "Company")

Colombia Operations Update

Amerisur Resources Plc, the oil and gas producer and explorer focused on South America, is pleased to provide an update of operations in Colombia.

The well Mariposa-1, in block CPO-5 has spudded and is drilling ahead. The well is expected to be drilled to 12,880ft measured depth in approximately 38 days. This well is operated by ONGC Videsh. The Company will provide a further update on completion of drilling operations.

The well is targeting the Guadalupe and basal sands, with a secondary target in the Mirador formation.

Platanillo-22 continues to drill ahead, currently at 7,460ft in the Rumiyaco formation. The next prognosed horizon is the Villeta N sand, at 7,831ft.

ENDS

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Notes to editors

Amerisur Resources is an independent full-cycle oil and gas company focused on South America, with assets in Colombia and Paraguay and production from the Platanillo field in southern Colombia. In 2016 Amerisur successfully built and is 100% owner of the strategic OBA oil transfer line into Ecuador.

In Colombia, the Company is operator and has a 100% working interest in the Platanillo block which includes the Platanillo field, which is currently producing circa 4,200 BOPD.  The Company has a strong position in the Putumayo basin and has a cluster of near term activity assets around the OBA export line including the Platanillo block, Put-8, Put-12 and Coati. A 40% working interest in contract Put-9, acquired from Talisman Colombia is currently awaiting approval by ANH. It has a diverse portfolio of longer term exploration assets.

This announcement contains inside information as defined in EU Regulation No. 596/2014 and is in accordance with the Company's obligations under Article 17 of that Regulation.

www.amerisurresources.com