To meet these design requirements, Amistad-2 will target an area near the crestal axis of one of the discovery’s localised anticlines, approximately 200 metres updip of the top reservoir in Alameda-2, to a total depth (TD) of 1125 metres MD. The well path will orthogonally traverse a series of localised fault and fracture zones and encounter all of the Unit 1B but no further. Drilling will be conducted utilising the company’s proprietary Melbana RDF at the minimum fluid weight required to safely drill and the well will be completed open-hole with a contingent slotted liner available if circumstances require. Civil construction of the Amistad-3 well-pad, access road and rig-camp locations were nearing completion and awaiting final levelling and compaction at the end of the period. The permit to drill is in hand and all necessary material drilling equipment and materials were received. The contingent Amistad-3 well has been planned under the same design requirements as Amistad-2. Amistad-3 targets the Unit 1B in a similar geological architecture from the Pad-4 location on the next parallel anticline to the south of Amistad-2. Amistad-3 is planned to be drilled to a TD of 1625 metres MD, shallower than the deepest known oil in the Amistad sheet (See Figure 5). Confirmation of oil saturation to the toe of the well may de-risk the adjacent oil prospect to the southwest. Subsurface development planning continued to progress throughout the course of the year and a focused effort made on defining suitable surface locations which allow the targeting of primarily Amistad sheet reservoirs based on the existing 2D seismic (See Figure 6). This process yielded 30 well concepts which may be justified to continue to appraise and develop the field. This subsurface development plan is based on revised interpretation of the greater Alameda structure and was reviewed with the Joint Operation partner and the Cuban regulator in April 2025. Our understanding of the stratigraphy observed in the Alameda wells drilled to date has been improved by an extensive biostratigraphic study of microscopic fossils preserved in the rocks and recovered as core and drill cuttings to date. Critically, this work permitted the understanding of the accurate Cuban formation names rather than the generic unit names that had been previously assigned. Figure 5 - Trajectory of Amistad-3 showing long intercept of fractured reservoir section 15 Melbana Energy Limited Annual Report 2025
RkJQdWJsaXNoZXIy MjE2NDg3