Amerisur Resources Plc provided a reserves, operational and production update, for its two core regions of Colombia: CPO-5 in the Llanos basin with ONGC Videsh; and the Putumayo basin with Occidental Andina and other partners. Highlights: Preliminary results of independent reserves report (assuming conservative production parameters) on CPO-5 (Amerisur 30%) indicates gross 2P reserves of 22.7 MMBO at Indico-1X and 2.9 MMBO at Mariposa as at 17 January 2019 Reserves report attributes mean gross prospective resources of 49.3 MMBO to the LS3 play around the Indico and Mariposa discoveries which are the targets of a new upcoming drilling programme; Indico-1X currently producing under choked natural flow at approximately 5,130 BOPD; Mariposa-1 continues to produce in natural flow at approximately 3,150 BOPD, with the field development plan under preparation by the operator; 2019 work programme targeting: 49.3 MMBO from a minimum of four additional wells from the Indico pad to determine the prospectivity of the area within the LS3 play. Drilling of the first of up to six wells on Coendu structure (Put 9 and Put 12) is expected to begin in the third quarter of 2019. Miraparriba-1 expected to spud in the first half of 2019 on Put-8. Group average daily production in fourth quarter 2018 was 4,602 BOPD, with peak daily production 5,405 BOPD. Production was impacted by completion issues in Platanillo 22 and 8. Current production rate is 5,426 BOPD. Ministry of Mines and Energy of Colombia approval to begin the purchase and shipping of third party crude via the OBA expected in the first half of 2019. ndico-1X Update: Indico-1X is currently producing under an extension of the short term test (STT) programme granted by ANH, while the application for Long Term Test (LTT) is processed. The well is currently producing in natural flow at approximately 5,130 BOPD with 0.19% water cut over a 46/64" choke. Mariposa-1: Mariposa-1 continues to produce in natural flow in a stable manner at approximately 3,150 BOPD with 0.4% water cut over a 28/64" choke. The well has produced approximately 1,300,000 BO since the beginning of the LTT. The Mariposa structure has now been declared a commercial discovery by ANH and the field development plan is under preparation by the operator. Reserves: The Company commissioned a preliminary study of the Indico-1X discovery and an update of the Mariposa structure analysis by McDaniel and Associates Consultants Ltd. (McDaniel) of Calgary. Based upon initial data, McDaniel has calculated the following gross technical recoverable volumes within the Mariposa and Indico structures to date: It is important to note that these data are preliminary in the sense that the 1P and 2P volumes assume conservative production parameters and also assumes that at Indico the Oil Water Contact ("OWC") of the structure exactly coincides with the Lowest Known Oil ("LKO") defined by logs and in-situ sampling and pressure tests in Indico-1X. The 3P number is similarly conservative, and assumes that the OWC is located approximately 40 feet deeper than the LKO already established in the well, that is an additional 13.6% of effective oil column. The Company expects these estimates to be refined as appraisal and development activities are performed at the Indico discovery. Given the size of the proven oil column, the extent and geometry of the Indico structure, the Company believes that the appraisal and development programme could lead to an increase in the reserves volumes. The values calculated by McDaniel are currently technical volumes, since the full field economic parameters are as yet undefined. However, the Company believes in light of the low operating costs and high price realizations for the light crude produced that economic reserves will be of similar values. According to McDaniel´s estimates the Indico-1X well alone may recover approximately 5.8 MMBO. CPR Resources: McDaniel was also commissioned to review the local structures associated with the LS3 play in the area of Indico and Mariposa at CPO-5, which are the targets of upcoming drilling. This review was performed on a simple structural basis only. Total production in the fourth quarter from the Platanillo and the Mariposa fields was 423,386 BO, with an average daily production of 4,602 BOPD. Platanillo production was impacted by completion issues in Platanillo 22 and 8, which occurred during interventions. These wells have now been evaluated and are currently being treated to return them to production. Further well interventions are planned on 24, 21, 25ST1, 17 and 7 as part of the normal maintenance and optimization operations in the Platanillo field. Current group production is 5,426 BOPD which includes the Company's share of the production from Indico-1X. OBA throughput in fourth quarter was 236,833 BO with average daily throughput of 2,574 BOPD. This was lower during the fourth quarter owing to the phasing of 2019 Government royalty barrels ("Royalty Barrels"). Royalty Barrels are collected at the Platanillo wellhead and transported by road. The Government elected to take delivery of its 2019 Royalty Barrels disproportionally in the fourth quarter, leading to lower utilisation of the OBA in the fourth quarter.