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Prospectus re Admission to the Official List - Heritage Oil

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RPS Energy<strong>Heritage</strong> <strong>Oil</strong> – Competent Persons Report7.4.2. Price Assumptions<strong>Heritage</strong> has assumed that <strong>the</strong> gross field production will be split between export (via Black Sea) anddomestic sales in <strong>the</strong> proportion 35 per cent./65 per cent. <strong>re</strong>spectively. The export price has been based on<strong>the</strong> Urals (Mediterranean) price. This has been derived from <strong>the</strong> B<strong>re</strong>nt fo<strong>re</strong>cast using a <strong>re</strong>lationship basedon an analysis of his<strong>to</strong>rical prices. A 5 per cent. discount <strong>to</strong> B<strong>re</strong>nt has been assumed for <strong>the</strong> valuation. Thedomestic price was assumed <strong>to</strong> be 50% of <strong>the</strong> Urals price.$100.0$90.0$80.0URALS (Mediterranean), $/bbl$70.0$60.0$50.0$40.0$30.0$20.0$10.0$0.0$0.0 $10.0 $20.0 $30.0 $40.0 $50.0 $60.0 $70.0 $80.0 $90.0 $100.0B<strong>re</strong>nt ($/bbl)Figu<strong>re</strong> 33: Plot of B<strong>re</strong>nt vs. URALS (Mediterranean)—1997 <strong>to</strong> 200722FEB2008034351817.4.3. Transportation CostsEstimates of <strong>the</strong> transportation costs for export via <strong>the</strong> Transneft pipeline system and for domestic saleswe<strong>re</strong> provided by <strong>Heritage</strong> <strong>Oil</strong> and Gas. A figu<strong>re</strong> of US$4.53/bbl was used for export costs and US$1.78/bblfor domestic transportation costs.7.4.4. Tax LossesThe <strong>to</strong>tal tax loss carry forward at 30/09/2007 of US$22.5 MM was included in <strong>the</strong> valuation as a deductionagainst futu<strong>re</strong> profits tax liabilities. This sum was provided by <strong>Heritage</strong>.7.4.5. Valuation SummaryAlthough <strong>the</strong> licence expiry date is 2024, <strong>the</strong> value and <strong>re</strong>serves have been <strong>re</strong>ported up <strong>to</strong> <strong>the</strong>ir economiclimit on <strong>the</strong> assumption that <strong>the</strong> licence will be extended full economic <strong>re</strong>covery of all <strong>the</strong> <strong>re</strong>serves. Thevaluation includes <strong>the</strong> cost of abandonment of <strong>the</strong> wells and all facilities, which has been estimated <strong>to</strong> beUS$25.0 MM, US$40.0 MM and US$55.0 MM (in 2007US$) for <strong>the</strong> 1P, 2P and 3P cases, <strong>re</strong>spectively.Post-Tax Net P<strong>re</strong>sent ValueEconomic(US$ Million, Money of <strong>the</strong> Day)Limit (1) 5% 7.5% 10% 12.5% 15%Proved Reserves (1P) ..................... 2025 69.1 40.2 17.5 0.2 32.9Proved plus Probable Reserves (2P) ........... 2029 413.6 308.0 226.6 163.5 46.7Proved plus Probable plus Possible Reserves (3P) . 2031 1356.2 1013.7 762.2 574.5 238.2Table 39:Zapadno Chumpasskoye Post-Tax Valuation (Net <strong>Heritage</strong> Sha<strong>re</strong>)124

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