Flows
How oil reaches each country
Where the EU’s crude oil and fuel come from, as each member state reports its imports; every band’s width is proportional to tonnes.
In March 2026, Croatia's petrol supply was 47 kt: 69% from its own refineries, with imports mainly from Slovenia (31%); tracing one step back, the crude behind it is estimated to come mainly from Libya (32%), Azerbaijan (16%) and Guyana (8%), and 35% cannot be traced.
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Crude origin (estimate)
- Colour = where it went:
- Croatia (own refineries)
- Slovenia
- Serbia
Last shipped from
- Reported (solid)
- Our arithmetic on reported figures (dotted)
- Estimated crude behind the fuel (dashed)
- Cannot be traced (hatched)
- Reported (solid)
- Our arithmetic on reported figures (dotted)
- Estimated crude behind the fuel (dashed)
- Cannot be traced (hatched)
The numbers as a table
| From | To | Tonnes | Share | How we know |
|---|---|---|---|---|
| Croatia (own refineries) | Croatia: petrol supply | 32,400 | 68.6% | ReportedEurostat nrg_cb_oilm (refinery output) |
| Slovenia | Croatia: petrol supply | 14,700 | 31.1% | ReportedEurostat nrg_ti_oilm (imports by partner country, energy basis) |
| Serbia | Croatia: petrol supply | 100 | 0.2% | ReportedEurostat nrg_ti_oilm (imports by partner country, energy basis) |
| From | To | Tonnes | Share | How we know |
|---|---|---|---|---|
| Libya | Croatia (own refineries) | 15,299 | 47.2% | EstimatedEstimate: Croatia's petrol to Croatia split by Croatia's crude-import mix over 2026-01 to 2026-03. Confidence: medium. |
| Slovenia: no refinery | Slovenia | 14,700 | 100.0% | UnknownThe supplying country has no crude oil refinery (a cited confirmed zero), so the fuel was made elsewhere and passed through. We look back one step only. |
| Azerbaijan | Croatia (own refineries) | 7,777 | 24.0% | EstimatedEstimate: Croatia's petrol to Croatia split by Croatia's crude-import mix over 2026-01 to 2026-03. Confidence: medium. |
| Guyana | Croatia (own refineries) | 3,896 | 12.0% | EstimatedEstimate: Croatia's petrol to Croatia split by Croatia's crude-import mix over 2026-01 to 2026-03. Confidence: medium. |
| Kazakhstan | Croatia (own refineries) | 3,788 | 11.7% | EstimatedEstimate: Croatia's petrol to Croatia split by Croatia's crude-import mix over 2026-01 to 2026-03. Confidence: medium. |
| Croatia: crude not from imports | Croatia (own refineries) | 1,639 | 5.1% | UnknownThe refineries used more crude than the country imported (its own production or stocks). That part is not traced rather than being filled with the import mix. |
| Smaller flows: no crude data | Serbia | 100 | 100.0% | UnknownWe hold no crude import statistics for the supplying country, and we do not assume what its refineries run on. |
Source & method
EurostatInferred · medium
Provenance
Inferred · mediumMedium- Publisher
- Eurostat
- Dataset id
- Imports of oil and petroleum products by partner country, monthly data (refined products)nrg_ti_oilmeurostat_nrg_ti_oilm_products
- Period
- 2026-03 (month)
- Retrieved
- 2026-09-23 12:11 UTC
- Type
- Inferred · medium
- Transformation
- none applied - stored exactly as published
- Licence
- Commission Decision 2011/833/EU - reuse authorised provided the source is acknowledged
- Supplier -> country links are published figures (OFFICIAL; the unattributed remainder and any 'Other suppliers' sum are CALCULATED).
- Crude -> supplier links are an estimate (INFERRED) from each supplier's crude-import mix; the published crude imports behind each one are in links[].evidence.
- Untraceable volumes are explicit UNKNOWN nodes with their cause. They are never spread over the traced origins.
Left: the crude oil behind the fuel (an estimate). Middle: the country’s own refineries and the countries the fuel was last shipped from, which may be a trading hub rather than where it was refined; the estimate treats each as the refiner. Right: Croatia’s supply of petrol in 2026-03, in tonnes of fuel. Only the middle-to-right flows are reported figures.
Countries without a crude refinery can appear under "Last shipped from": the importing country's statistics record where the fuel arrived from. It was refined elsewhere and either sold on or passed through that country's terminals; the statistics do not say which, or where it was refined.
Month: 2026-03 (requested). Crude mixes are pooled over 2026-01 to 2026-03.
Fuel that cannot be traced, and the reason
- Slovenia: no refinery (14,700 t): The supplying country has no crude oil refinery (a cited confirmed zero), so the fuel was made elsewhere and passed through. We look back one step only.
- Croatia: crude not from imports (1,639 t): The refineries used more crude than the country imported (its own production or stocks). That part is not traced rather than being filled with the import mix.
- Smaller flows: no crude data (100 t): We hold no crude import statistics for the supplying country, and we do not assume what its refineries run on.
- Only the supplier -> country links are reported figures. The crude -> supplier links are an estimate: each supplier's fuel is split by that supplier's own crude-import mix over the latest three months.
- Exports are assumed to be drawn from every source in proportion to its share of supply.
- The chain looks back one country only. Imports are counted under the country the fuel was last shipped from; where that country has refineries, fuel that only passed through it is traced as if it had been refined there.
- Widths are tonnes of this fuel, not tonnes of crude oil: a refinery makes several products from each tonne of crude.