Monthly Production, OBA and Operational Update

2 October 2017

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

Monthly Production, OBA Throughput and Operational Update

Amerisur Resources Plc, the oil and gas producer and explorer focused on South America, is pleased to provide unaudited Platanillo Field production and OBA throughput data for the month of September 2017 (the "Period").

Production

· Total production was 120,662 barrels of oil ("BO") during the Period.

· Average production per calendar day was 4,022 barrels of oil per day ("bopd") during the Period.

· Average production per operational day was 6,033 bopd during the Period.

· Peak daily production was 7,397 bopd during the Period.

· Current production is approximately 7,400 bopd.

OBA Export

· Total export volume was 122,352 BO during the Period.

· Average throughput per calendar day was 4,078 BO during the Period.

· Average throughput per operational day was 6,117 BO.

· Peak daily throughput was 7,137 BO during the Period.

This data will vary month on month as development, appraisal and exploration operations continue, and also due to the factors involved in operating in the Putumayo region of Colombia. These factors include inclement weather, social issues with drilling and oil transportation and planned and unplanned shut downs for technical works undertaken among others. This data has not yet been approved by the Colombian Agencia Nacional de Hidrocarburos (ANH) or national customs and tax authorities DIAN and may be subject to revision.

Platanillo-21, located on Pad 2N was placed on commercial production at approximately 1,000 BOPD on 29 September. On Platanillo-25, currently being drilled from pad 2N, 9.5/8" casing has been cemented at 5,682ft. This well, a southerly step out well from Pad 2N, is expected to be logged in mid-October.

The Company has been informed by the Operator that the well Mariposa-1 will be placed on Long Term Test (LTT) in mid-October.

John Wardle, CEO commented: "The disruptions to production caused by social issues and the Papal visit were regrettable but are behind us now and I am pleased that both our production and OBA throughput continue to grow so strongly. Platanillo-21 was a very good result which confirms further the production and reserves potential we have developed at Pad 2N. I look forward to the results of our next well on that pad during October. I also look forward to the commencement of the Mariposa LTT, which I am sure will add further material production to Amerisur. "

ENDS

Enquiries:

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 7,400 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, Coati, Put-9, Tacacho, Mecaya and Terecay. 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