Amerisur Resources Plc, provides an operational update regarding the initial short term testing at the Indico-1 well on the CPO-5 block and upcoming CPO-5 drilling program. STT at the Indico-1 well has flowed 35.9° API oil to surface from the Lower Sands ("LS3") of the Une formation at a series of choke sizes with a final flow rate of 4,530 barrels of fluid per day (gross) with a water cut of 0.33% at a choke size of 40/64" and a wellhead pressure of 241psi. Initial analysis by the Company indicates that a 283 feet gross, 209 feet net, oil column is present in the LS3 formation at Indico-1. Reservoir pressure data confirms an oil column throughout the LS3 reservoir, with no indication of Oil-Water-Contact ("OWC"). Indico-1 will continue to be produced under STT while application is made to ANH to begin a Long-Term-Testing ("LTT") program on the well. Fully funded four-well directional drilling program to commence immediately from the Indico pad to determine the prospectively of the area within the LS3 play; Calao-1, targeting a structure alongside Indico to the southwest, towards the Aguila structure expected to spud in January 2019. On a simple structural basis, the Company estimates potential resources at Calao of between 2 and 7 mmbo; Pavo Real-1 to follow Calao-1, targeting a similar structure adjoining Indico to the northeast. Structural evaluation by the Company estimates potential resources of 2 to 23 mmbo in this prospect; Given the potential for combination trapping, the Company believes potential resources may be significantly higher at both Calao-1 and Pavo Real-1; Following these wells, a further two appraisal wells will be drilled in the Indico structure from the Indico pad, with the objective of refining resources and reserves estimates and Sol-1 is drill-ready and the Company is considering with its partner whether to drill it following the above program or the option for a second drilling rig in the short term.