Solutions
Built around the assets you operate.
Every oil & gas facility has its own mix of combustion, flaring, venting and fugitive sources. EmitLedger starts from engineering templates of those facilities, so the source register looks like your plant, not like a generic carbon form.
01 Floating production and storage
FPSOs and FSOs
Power generation, gas compression, HP and LP flares, cargo tank flashing and offloading on one hull, with fuel gas that changes composition as the reservoir does.
What makes it hard
- Flare and fuel-gas volumes metered at different reference conditions
- Cargo tank flashing and offloading losses that spreadsheets often leave out
- Non-routine flaring during trips and start-ups that must be logged as events
- Contractor-operated units reporting to more than one client
How FEEC helps
FEEC engineers have worked on FPSO topsides in West Africa and can set up the source register from your P&IDs and metering philosophy.
Typical source register
Template: FPSO / FSO v1| Source | Category | Method |
|---|---|---|
| Gas turbine generators | Stationary combustion | COMB_GAS_MB_V1 |
| Emergency diesel generators and cranes | Stationary combustion | COMB_LIQUID_NCV_V1 |
| HP and LP flares (routine, non-routine, purge and pilot) | Flaring | FLARE_COMP_V1 |
| Compressor dry gas seal vents | Venting | VOLUME_COMP_V1 |
| Blowdowns | Venting | BLOWDOWN_PVT_V1 |
| Cargo tank flashing | Venting | VOLUME_COMP_V1 |
| Offloading | Venting | LOADING_EF_V1 |
| Equipment leaks | Fugitives | COUNT_EF_V1 |
| HVAC refrigerant | Fugitives | MASS_TOPUP_V1 |
- Set-up
- Start from the FPSO / FSO template and tailor meters, reference conditions and tiers.
- Suggested packs
- Base, OGMP 2.0, plus EU ETS, UK ETS or regional packs where the unit operates
02 Fixed platforms and MOPUs
Offshore platforms
Turbine-driven power and compression, a flare, cold vents and blowdowns, pneumatic controllers and diesel-driven cranes and fire pumps.
What makes it hard
- Cold vents and blowdowns with no meter, estimated from pressure, temperature and volume
- Pneumatic controllers and seal vents counted rather than measured
- Several platforms sharing one gas analysis and one export meter
How FEEC helps
FEEC has delivered MOPU topsides engineering offshore Thailand and India, and blowdown dynamic simulation for offshore separators.
Typical source register
Template: Fixed platform v1| Source | Category | Method |
|---|---|---|
| Gas turbine generators and compressor drivers | Stationary combustion | COMB_GAS_MB_V1 |
| Diesel generators, cranes and fire pumps | Stationary combustion | COMB_LIQUID_NCV_V1 |
| HP flare | Flaring | FLARE_COMP_V1 |
| Blowdown events | Venting | BLOWDOWN_PVT_V1 |
| Cold vents and dry gas seals | Venting | VOLUME_COMP_V1 |
| Pneumatic controllers and equipment leaks | Fugitives | COUNT_EF_V1 |
| HVAC refrigerant | Fugitives | MASS_TOPUP_V1 |
- Set-up
- Start from the fixed platform template, then add or remove systems to match the topsides.
- Suggested packs
- Base, OGMP 2.0, plus EU ETS, UK ETS, US EPA GHGRP or regional packs
03 Processing, boosting and treatment
Onshore gas plants
Gas engine compressors, amine acid-gas removal, glycol dehydration, fired heaters, a flare and grid electricity in one facility.
What makes it hard
- CO₂ vented from amine units, calculated from inlet and outlet gas analyses
- Rod packing and glycol still vents on many compressors and trains
- Purchased electricity reported both location-based and market-based
How FEEC helps
FEEC has engineered onshore gas processing, boosting and TEG dehydration facilities in South Asia, the Middle East and New Zealand.
Typical source register
Template: Gas plant v1| Source | Category | Method |
|---|---|---|
| Gas engine compressors | Stationary combustion | COMB_GAS_MB_V1 |
| Fired heaters | Stationary combustion | COMB_GAS_MB_V1 |
| Amine unit CO₂ vent | Venting | AMINE_CO2_MB_V1 |
| Rod packing and glycol dehydration vents | Venting | VOLUME_COMP_V1 |
| Flare | Flaring | FLARE_COMP_V1 |
| Pneumatic controllers and equipment leaks | Fugitives | COUNT_EF_V1 |
| Grid electricity | Purchased energy | ELEC_DUAL_V1 |
- Set-up
- Start from the gas plant template, then set the number of compressor trains, heaters and treating units.
- Suggested packs
- Base, OGMP 2.0, plus US EPA GHGRP, Australia NGER, EU packs or others by country
04 Storage, loading and liquefaction
Terminals and LNG
Tank and loading losses, vapour handling, flares and power for storage terminals and export facilities, including liquefaction trains.
What makes it hard
- Loading and tank losses that depend on throughput and vapour composition
- Large gas turbine or electric drives, where Scope 2 can dominate
- Flares that handle both routine vapour and upset events
How FEEC helps
FEEC onboarding sets up the terminal's source register and data streams with you.
Typical source register
Source register set-up| Source | Category | Method |
|---|---|---|
| Gas turbines, boilers and heaters | Stationary combustion | COMB_GAS_MB_V1 |
| Marine loading | Venting | LOADING_EF_V1 |
| Tank and vapour vents | Venting | VOLUME_COMP_V1 |
| Flares | Flaring | FLARE_COMP_V1 |
| Equipment leaks from LDAR surveys | Fugitives | FUGITIVE_LDAR_V1 |
| Purchased electricity | Purchased energy | ELEC_DUAL_V1 |
- Set-up
- There is no dedicated terminal template yet. Assets are built from the source register with the same methods, usually during onboarding.
- Suggested packs
- Base, plus EU ETS, UK ETS, US EPA GHGRP, disclosure or regional packs
05 Rigs, well testing and fleets
Drilling and service contractors
Diesel-driven rigs, well test flaring and owned vessels or vehicles, reported to operators and to your own corporate inventory.
What makes it hard
- Fuel consumption recorded per rig, per client and per campaign
- Well test flaring volumes and compositions from each test
- The same data reported in each client's format
How FEEC helps
FEEC engineers can map your fuel and well test records into the Excel templates during onboarding.
Typical source register
Source register set-up| Source | Category | Method |
|---|---|---|
| Rig engines and generators | Stationary combustion | COMB_LIQUID_NCV_V1 |
| Well test flaring | Flaring | FLARE_COMP_V1 |
| Owned vessels and vehicles | Mobile combustion | COMB_LIQUID_NCV_V1 |
| Refrigerant top-ups | Fugitives | MASS_TOPUP_V1 |
- Set-up
- Each rig or spread is an asset built from the source register. Consolidation by operational control or equity share gives both the client view and your own inventory.
- Suggested packs
- Base, plus disclosure packs for your own reporting
06 Inventories run for several clients
ESG and engineering consultancies
Consultancies that prepare inventories for operators get multi-client consultant access, the same methods and audit trail for every client, and a partner margin.
What makes it hard
- A different spreadsheet and method for every client
- Verifier questions on numbers prepared months earlier
- Keeping each client's data strictly separate
How FEEC helps
Partners earn a 20–30% margin. FEEC engineers can support you on methodology questions.
Typical source register
Source register set-up| Source | Category | Method |
|---|---|---|
| All stationary combustion sources | Stationary combustion | COMB_GAS_MB_V1 |
| Flaring | Flaring | FLARE_COMP_V1 |
| Venting and blowdowns | Venting | VOLUME_COMP_V1 |
| Fugitives from counts or LDAR | Fugitives | FUGITIVE_LDAR_V1 |
| Purchased energy | Purchased energy | ELEC_DUAL_V1 |
- Set-up
- Each client is a separate tenant, isolated in the database. Use any asset template for each client's facilities.
- Suggested packs
- Any pack your clients report under
Something else?
Compressor stations, pipelines and storage.
Any facility can be modelled from the source register with the same methods and governance. FEEC engineers can build a template for your asset type as a service.
Let's talk
See a template for your asset.
We will set up a demo asset that looks like yours and walk through the source register, the Excel templates and the dashboards.