{"id":"analysis-fuel-logistics-safety-reserve-inventory-drawdown-october-2026","canonicalSlug":"analysis-fuel-logistics-safety-reserve-inventory-drawdown-october-2026","url":"https://wellficent.com/en/news/analysis-fuel-logistics-safety-reserve-inventory-drawdown-october-2026","language":"en","title":"Fuel logistics: distinguish the safety buffer from time to empty","summary":"A hypothetical inventory balance shows why a protected reserve and slower deliveries require different operating decisions.","body":["Petrobras’s 30 September Codajás release describes preventive logistics for falling river levels, including extended storage at Coari and dedicated vessels supporting deliveries and the movement of Urucu production. It supplies context for inventory planning, not the numerical inputs below. Neither those arrangements nor a vessel’s storage capacity reveal actual contemporaneous throughput or autonomy. A published capacity cannot simply be inserted as an observed daily arrival rate.","Consider an independent, hypothetical equivalent-liquid system using one consistently defined cubic-metre basis. Initial physical inventory I0 is 5,000 m³; a protected safety reserve R is 1,000 m³. Only 4,000 m³ is usable before that threshold is reached. Assume demand d of 1,000 m³/day and net arrivals a of 800, 600 or 400 m³/day. The balance is I(t)=I0+(a−d)t, with time measured in days and losses assumed zero.","For arrivals below demand, time to the safety-reserve threshold is (I0−R)/(d−a). The three cases give 20, 10 and approximately 6.67 days. These are times until physical stock reaches 1,000 m³, not times until the tank is empty. If the same rates continued and the protected reserve were consumed, total stockout would instead occur after 25, 12.5 and approximately 8.33 days. Spending the reserve changes the operating policy; it does not make the original buffer larger.","Arrival and withdrawal rates must describe the same system, product basis and observation period. This example combines neither LPG tonnes with crude-oil cubic metres nor liquids with gas volumes; it assumes no density or conversion factor and represents no Codajás cargo. Constant demand and arrivals ignore stochastic deliveries, navigation delays and discrete ship unloading. If a is at least d, this loss-free model has no finite drawdown time to the lower reserve threshold. Actual data would require aligned flows, starting stock and uncertainty before estimating an operating margin.","Preserving a buffer may protect service continuity, but the model contains no evidence about the economic value of avoiding disruption. Holding inventory can tie up capital and incur handling, storage or product-loss costs; their size depends on actual prices, financing, facilities and product characteristics, all unknown here. It would therefore be unjustified to assign profit or project NPV to these days. Autonomy is a conditional stock-to-flow calculation, not a forecast, and resilient transport does not itself establish growth in well production. The illustrative horizon is a planning label, not a validated future operating schedule."],"keyPoints":[],"sections":[],"text":"Fuel logistics: distinguish the safety buffer from time to empty\n\nA hypothetical inventory balance shows why a protected reserve and slower deliveries require different operating decisions.\n\nPetrobras’s 30 September Codajás release describes preventive logistics for falling river levels, including extended storage at Coari and dedicated vessels supporting deliveries and the movement of Urucu production. It supplies context for inventory planning, not the numerical inputs below. Neither those arrangements nor a vessel’s storage capacity reveal actual contemporaneous throughput or autonomy. A published capacity cannot simply be inserted as an observed daily arrival rate.\n\nConsider an independent, hypothetical equivalent-liquid system using one consistently defined cubic-metre basis. Initial physical inventory I0 is 5,000 m³; a protected safety reserve R is 1,000 m³. Only 4,000 m³ is usable before that threshold is reached. Assume demand d of 1,000 m³/day and net arrivals a of 800, 600 or 400 m³/day. The balance is I(t)=I0+(a−d)t, with time measured in days and losses assumed zero.\n\nFor arrivals below demand, time to the safety-reserve threshold is (I0−R)/(d−a). The three cases give 20, 10 and approximately 6.67 days. These are times until physical stock reaches 1,000 m³, not times until the tank is empty. If the same rates continued and the protected reserve were consumed, total stockout would instead occur after 25, 12.5 and approximately 8.33 days. Spending the reserve changes the operating policy; it does not make the original buffer larger.\n\nArrival and withdrawal rates must describe the same system, product basis and observation period. This example combines neither LPG tonnes with crude-oil cubic metres nor liquids with gas volumes; it assumes no density or conversion factor and represents no Codajás cargo. Constant demand and arrivals ignore stochastic deliveries, navigation delays and discrete ship unloading. If a is at least d, this loss-free model has no finite drawdown time to the lower reserve threshold. Actual data would require aligned flows, starting stock and uncertainty before estimating an operating margin.\n\nPreserving a buffer may protect service continuity, but the model contains no evidence about the economic value of avoiding disruption. Holding inventory can tie up capital and incur handling, storage or product-loss costs; their size depends on actual prices, financing, facilities and product characteristics, all unknown here. It would therefore be unjustified to assign profit or project NPV to these days. Autonomy is a conditional stock-to-flow calculation, not a forecast, and resilient transport does not itself establish growth in well production. The illustrative horizon is a planning label, not a validated future operating schedule.\n\nTechnical and economic analysis\n\nAnalysis as of: 2026-10-08\n\nEvidence cutoff: 2026-10-08\n\nOutlook horizon: 2026–2027\n\nIllustrative sensitivity\n\nIllustrative days to the protected safety reserve\n\nHypothetical single equivalent-liquid basis: initial 5,000m³, protected reserve 1,000m³, demand 1,000m³/day, arrivals 800/600/400m³/day; zero losses and constant flows. (I0−R)/(d−a) reaches the reserve, not total stockout. No actual Codajás volume, LPG conversion, production or forecast.\n\nThese calculations illustrate stated assumptions; they are not observations or a calibrated forecast.\n\nArrivals 800m³/day: 20 days to safety reserve\n\nArrivals 600m³/day: 10 days to safety reserve\n\nArrivals 400m³/day: 6.6667 days to safety reserve","category":"energy","region":"world","topics":["brazil","technical-analysis","energy-economics","fuel-logistics","inventory"],"eventDate":"2026-10-08","eventDateBasis":"analysis-as-of-date","publishedAt":"2026-10-08T16:11:06Z","modifiedAt":"2026-10-08T16:11:06Z","publicationBasis":"first-publication","preparedAt":"2026-10-08T15:56:38Z","sourcePublishedAt":"2026-09-30","translatedAt":null,"sources":[{"name":"Agência Petrobras","url":"https://agencia.petrobras.com.br/w/negocio/opera%C3%A7%C3%A3o-codaj%C3%A1s-mobiliza-plano-para-garantir-abastecimento-de-combust%C3%ADveis-na-regi%C3%A3o-norte","publishedAt":"2026-09-30","checkedAt":"2026-10-08"}],"translations":{"en":"https://wellficent.com/en/news/analysis-fuel-logistics-safety-reserve-inventory-drawdown-october-2026","tr":"https://wellficent.com/tr/news/analysis-fuel-logistics-safety-reserve-inventory-drawdown-october-2026","ar":"https://wellficent.com/ar/news/analysis-fuel-logistics-safety-reserve-inventory-drawdown-october-2026","fr":"https://wellficent.com/fr/news/analysis-fuel-logistics-safety-reserve-inventory-drawdown-october-2026","es":"https://wellficent.com/es/news/analysis-fuel-logistics-safety-reserve-inventory-drawdown-october-2026","ru":"https://wellficent.com/ru/news/analysis-fuel-logistics-safety-reserve-inventory-drawdown-october-2026","pt":"https://wellficent.com/pt/news/analysis-fuel-logistics-safety-reserve-inventory-drawdown-october-2026"},"corrections":[],"locations":[{"id":"country-br","type":"country","countryCode":"BR","name":{"en":"Brazil","tr":"Brezilya","ar":"البرازيل","fr":"Brésil","es":"Brasil","ru":"Бразилия","pt":"Brasil"},"context":{"en":"Country identified in the primary source; no site coordinates asserted.","tr":"Birincil kaynakta belirtilen ülke; saha koordinatı iddiası yok.","ar":"البلد المحدد في المصدر الأصلي؛ لا ندعي إحداثيات موقع.","fr":"Pays identifié dans la source primaire; aucune coordonnée de site affirmée.","es":"País identificado en la fuente primaria; no se afirman coordenadas del sitio.","ru":"Страна указана в первоисточнике; координаты площадки не заявлены.","pt":"País identificado na fonte primária; não se afirmam coordenadas do local."},"source":{"name":"Agência Petrobras","url":"https://agencia.petrobras.com.br/w/negocio/opera%C3%A7%C3%A3o-codaj%C3%A1s-mobiliza-plano-para-garantir-abastecimento-de-combust%C3%ADveis-na-regi%C3%A3o-norte","publishedAt":"2026-09-30","checkedAt":"2026-10-08"}}],"type":"analysis","analysis":{"kind":"technical-economic","asOf":"2026-10-08","evidenceCutoff":"2026-10-08","horizon":"2026–2027","chart":{"kind":"illustrative","title":{"en":"Illustrative days to the protected safety reserve","tr":"Korunan güvenlik rezervine örnek gün sayısı","ar":"أيام توضيحية حتى احتياطي الأمان المحمي","fr":"Jours illustratifs jusqu’à la réserve protégée","es":"Días ilustrativos hasta la reserva protegida","ru":"Условные сутки до защищённого страхового резерва","pt":"Dias ilustrativos até a reserva protegida"},"unit":"days to safety reserve","unitLabel":{"en":"days to safety reserve","tr":"güvenlik rezervine gün","ar":"أيام حتى احتياطي الأمان","fr":"jours jusqu’à la réserve de sécurité","es":"días hasta la reserva de seguridad","ru":"сутки до страхового резерва","pt":"dias até a reserva de segurança"},"note":{"en":"Hypothetical single equivalent-liquid basis: initial 5,000m³, protected reserve 1,000m³, demand 1,000m³/day, arrivals 800/600/400m³/day; zero losses and constant flows. (I0−R)/(d−a) reaches the reserve, not total stockout. No actual Codajás volume, LPG conversion, production or forecast.","tr":"Tek eşdeğer sıvı temelinde varsayımsal başlangıç 5.000m³, korunan rezerv 1.000m³, talep 1.000m³/gün, varış 800/600/400m³/gün; sıfır kayıp ve sabit debiler. (I0−R)/(d−a) toplam tükenmeye değil rezerv eşiğine ulaşır. Gerçek Codajás hacmi, LPG dönüşümü, üretim veya tahmin değil.","ar":"أساس سائل مكافئ واحد افتراضي: بداية 5,000م³، احتياطي محمي 1,000م³، طلب 1,000م³/يوم، وصول 800/600/400م³/يوم؛ خسائر صفر وتدفقات ثابتة. (I0−R)/(d−a) يصل للاحتياطي لا للنفاد الكلي. ليست أحجام Codajás أو تحويل غاز البترول المسال أو إنتاجاً فعلياً أو توقعاً.","fr":"Base unique de liquide équivalent hypothétique: départ 5 000m³, réserve 1 000m³, demande 1 000m³/j, arrivées 800/600/400m³/j; pertes nulles et débits constants. (I0−R)/(d−a) atteint la réserve, pas l’épuisement total. Ni volume réel Codajás, conversion GPL, production ou prévision.","es":"Base única de líquido equivalente hipotético: inicial 5.000m³, reserva 1.000m³, demanda 1.000m³/día, llegadas 800/600/400m³/día; pérdidas nulas y tasas constantes. (I0−R)/(d−a) llega a la reserva, no al agotamiento total. No son volumen real Codajás, conversión GLP, producción ni pronóstico.","ru":"Единая условная основа эквивалентной жидкости: начало 5 000м³, резерв 1 000м³, потребление 1 000м³/сутки, поступление 800/600/400м³/сутки; нулевые потери, постоянные потоки. (I0−R)/(d−a) достигает резерва, не полного исчерпания. Не реальные объёмы Codajás, пересчёт СУГ, добыча или прогноз.","pt":"Base única de líquido equivalente hipotético: inicial 5.000m³, reserva 1.000m³, demanda 1.000m³/dia, chegadas 800/600/400m³/dia; perdas nulas e taxas constantes. (I0−R)/(d−a) atinge a reserva, não o esgotamento total. Não são volume real Codajás, conversão GLP, produção ou previsão."},"rows":[{"value":20,"label":{"en":"Arrivals 800m³/day","tr":"Varış 800m³/gün","ar":"وصول 800م³/يوم","fr":"Arrivées 800m³/j","es":"Llegadas 800m³/día","ru":"Поступление 800м³/сутки","pt":"Chegadas 800m³/dia"}},{"value":10,"label":{"en":"Arrivals 600m³/day","tr":"Varış 600m³/gün","ar":"وصول 600م³/يوم","fr":"Arrivées 600m³/j","es":"Llegadas 600m³/día","ru":"Поступление 600м³/сутки","pt":"Chegadas 600m³/dia"}},{"value":6.666666666666667,"label":{"en":"Arrivals 400m³/day","tr":"Varış 400m³/gün","ar":"وصول 400م³/يوم","fr":"Arrivées 400m³/j","es":"Llegadas 400m³/día","ru":"Поступление 400м³/сутки","pt":"Chegadas 400m³/dia"}}]}}}