AMER.L Regulatory News (AMER)

6 February 2013

Amerisur Resources Plc

("Amerisur" or the "Company")

Presentation at RBC Capital Markets' International Exploration & Production Conference

Amerisur Resources Plc, the oil and gas producer and explorer focused on South America, announces that John Wardle, Chief Executive, will today be presenting at RBC Capital Markets' International Exploration & Production Conference in Toronto.

The following new disclosures are made as part of the presentation:

·; Current production capacity of the producing wells on the Platanillo fields is at 5,800 bopd, but currently operating on a controlled basis of 4,300 bopd in view of continuing logistical constraints

·; A new well, Platanillo-10 is currently at approximately 7,800ft and the sidetrack of legacy well Platanillo-1 ST1 is at approximately 6,000ft. Results from these wells are expected in the next few weeks

·; A 10 well programme on the Platanillo field has been planned for 2013

·; The newly acquired Put-12 block, adjacent to Platanillo, has the same geology as Platanillo with multiple Platanillo type structures and similar fields across the river in Ecuador.

A copy of the presentation will be available shortly after 12.00pm GMT. The updated investor presentation can be found at the Company website: www.amerisurresources.com.

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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. Amerisur's strategy is to acquire, explore and develop large acreage positions in major underexplored basins located in South America. The Company's distinctive approach has been to own 100% of its assets at early stages in order to have full control over the fields' development. That requirement is now being relaxed as a sound production baseline has been established.

In Colombia, the Company is operator and has a 100% working interest in the Platanillo block. The 14,341 hectare block is located in the Putumayo Basin, in the south of Colombia, and currently produces around 4,300bopd. In November 2012, the Company successfully bid for block Putumayo-12, which is adjacent to Platanillo and is operator with a 60% working interest. The Company also holds 100% of the Fenix block, a 24,117 hectare area in the Middle Magdalena Basin of Colombia. The company has recently completed the acquisition of a 59.42km 2D seismic survey in the southern part of the Fenix block. In Paraguay, Amerisur is the largest acreage holder in the country, with 6.2 million hectares covering two 100% owned oil and gas permits in the Paraguayan part of the Chaco and Parana Basins.

John Wardle is CEO of Amerisur, having worked in Colombia since 1994, first for BP Exploration and subsequently for Emerald Energy. The Company is chaired by Giles Clarke and is listed on AIM in London.

www.amerisurresources.com