AMER.L Regulatory News (AMER)

25 April 2014

Amerisur Resources Plc

Platanillo-15 Update

Amerisur Resources Plc ("Amerisur" or the "Company"), the oil and gas producer and explorer focused on Latin America (LSE: AMER), is pleased to report an update on the well Platanillo-15 in the Platanillo Field, Colombia, the third of a planned seven firm well drilling campaign during 2014.

Following the completion of Platanillo-17 the Serinco D-10 rig was moved from Platform 3N to Platform 9S in order to drill a further 3 wells. The rig was inspected and a 15 day maintenance and upgrade programme was completed.

Platanillo-15 was spudded on 23rd April 2014 and will be drilled directionally to a reservoir target approximately 1,602ft south-west of the surface location. The total depth of the well will be approximately 8,589ft MD with a maximum inclination of 17°. The Company expects log data from this well by the end of May.

When the three wells at Platform 9S are completed and placed on production the Company intends to shift drilling operations to Platform 5S from which a further 2 wells will be drilled. At that point the Platanillo field South and Central Lobes will benefit from 17 new wells and 3 side-tracks which the Company considers, on success, will support a prudent plateau oil rate in the absence of export constraints of some 12,000 BOPD.

John Wardle, Chief Executive Officer, commented:

"Our 2014 drilling programme is progressing to plan and I look forward to updating shareholders on the results from Platanillo-15 as our exciting development of the Southern and Central Lobes of the Platanillo field continues to evolve. The rig upgrades made to the drilling rig D-10 should bring us further efficiencies in our well operations, driving CAPEX down and delivering wells more rapidly.

Our work on the Ecuador interconnector is moving forward satisfactorily and we expect to have that system in operation in the second half of this year."

ENDS

Competent person: Technical information in this announcement has been reviewed by John Wardle Ph.D., the Company's Chief Executive. John Wardle has 28 years' experience in the industry, having worked for BP, Britoil, Emerald Energy and Pebercan, and is a trained drilling engineer.

ENQUIRIES: