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Prospectus re Admission to the Official List - Heritage Oil

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As it is statistically incor<strong>re</strong>ct <strong>to</strong> sum <strong>the</strong> p90, p50 and p10 volumes, <strong>the</strong> risked <strong>re</strong>coverable Contingent andProspective <strong>re</strong>sources in Blocks 1A and 3 have been consolidated s<strong>to</strong>chastically and a<strong>re</strong> quoted on a100 per cent. basis (i.e. gross) in Table 5.Gross Risked Recoverable Resources (MMstb)p90 p50 p10 Mean280 793 1,731 923Table 5:Consolidation of Gross Risked Recoverable Resources in Blocks 1 and 3A Reviewed by RPS<strong>Heritage</strong> has estimated potential <strong>re</strong>sources in a<strong>re</strong>as of <strong>the</strong>ir Ugandan blocks beyond seismic control. Thiswas beyond <strong>the</strong> scope of <strong>the</strong> RPS evaluation given <strong>the</strong> time available. Conceptual leads a<strong>re</strong> based on<strong>Heritage</strong>’s <strong>re</strong>gional and structural knowledge. At <strong>the</strong> time of this <strong>re</strong>port, <strong>Heritage</strong> carry th<strong>re</strong>e conceptualleads in <strong>the</strong>ir portfolio: two of which a<strong>re</strong> located in <strong>the</strong> nor<strong>the</strong>rn part of Block 1 and one in <strong>the</strong> southwesternext<strong>re</strong>mity of Block 3A. The unrisked mean STOIIP estimates from <strong>the</strong>se evaluations a<strong>re</strong> <strong>re</strong>portedfor completeness (Table 6) but RPS does not warrant <strong>the</strong>se estimates and is not in a position <strong>to</strong> commen<strong>to</strong>n <strong>the</strong> hydrocarbon potential of <strong>the</strong>se a<strong>re</strong>as.Mean STOIIP (MMstb)Block 3A, Conceptual Structu<strong>re</strong> D ........... 464Block 1, Conceptual Structu<strong>re</strong> F ............ 2,925Block 1, Conceptual Structu<strong>re</strong> G ............ 2,925Total ........................... 6,314Table 6:<strong>Heritage</strong> Unrisked Conceptual Leads (Not Reviewed by RPS)Economic EvaluationEconomic valuation of <strong>re</strong>serves and <strong>re</strong>sources a<strong>re</strong> linked <strong>to</strong> a long term price fo<strong>re</strong>cast for B<strong>re</strong>nt. The BaseCase price fo<strong>re</strong>casts, used for all valuations p<strong>re</strong>sented in this <strong>re</strong>port, a<strong>re</strong> given in. Table 7.US$/bbl, MOD4Q 2007 ........................... 88.62008 .............................. 85.02009 .............................. 82.02010 .............................. 80.02011 .............................. 78.02012 .............................. 77.02013 .............................. 77.32014 .............................. 78.82015 .............................. 80.42016 .............................. 82.02017 .............................. 83.72018 .............................. 85.32019 .............................. 87.02020 .............................. 88.82021 .............................. 90.62022 onwards ....................... +2% p.a.Table 7:RPS Price Base Case Fo<strong>re</strong>casts (US$/bbl Money of <strong>the</strong> Day)66

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