Amerisur Resources Spuds First Plantanillo Well

Amerisur Resources has spudded the Platanillo-1, located in the Putumayo Basin. Drilling operations for the consecutive two wells within this area remain on schedule. The Platanillo-1 well will be drilled to a total measured depth of approximately 8,413 feet, over a period of 30 days. This well is located 2,200m from the existing discovery well, Alea-1 and will penetrate the "P50" contour of the structure map generated from seismic data. Platanillo-1 is classed as an A2b (Lahee classification) exploration well, and as such the objective is to ascertain the presence of reserves at a position structurally deeper than Alea-1. Should the well encounter hydrocarbons, initial testing is planned to last for 10 to 15 days. The drilling rig will subsequently drill the next well, Platanillo-2, of which the location depends upon the results observed in Platanillo-1.

The re-entry program for Alea-1 is on schedule as previously announced.

Amerisur Resources Plc holds a 25% working interest in this block under the Platanillo E&P Contract with the Colombian National Hydrocarbons Agency (ANH). Repsol YPF holds 35% and Ecopetrol S.A.(40%)is the operator.

Dr John Wardle, Amerisur's Chief Executive Officer commented:

"This spudding marks the start of the program to investigate and subsequently exploit the Platanillo contract area. We look forward to results from these wells."