Floating Production Storage and Offloading units. CII-exempt; per-barrel-produced intensity is the industry benchmark (IOGP Scope-1 upstream indicator).
Formula
$$ \text{CO}2^\text{year} = \sum_j F_j \cdot C{f,j} $$
$$ \text{Intensity} = \frac{\text{CO}_2 \cdot 1000}{\text{Barrels}} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $F_j$ | Mass of fuel $j$ | t | bunker log |
| $C_{f,j}$ | CO₂ factor | t CO₂ / t fuel | MEPC.364(79) |
| $Bench (Barrels produced / year)$ | operational benchmark | bbl | operations log |
| $d_\text{op}$ | Operating days | d | operations log |
IOGP 2023 fleet average ≈ 11–16 kg CO₂ per barrel for FPSOs. Flare reduction, gas reinjection and cold venting abatement are the biggest levers.
Sources
- IOGP Report 471 - Environmental performance indicators.
- IMO MEPC.364(79) - Cf conversion factors.