Scope 1 & 2 · Oil & gas
Emissions accounting built for oil & gas.
Flare, vent, fugitive and energy sources calculated gas by gas to the API Compendium and OGMP 2.0, with every number traceable to its meter reading. Audit-ready from the first month.
Hover or tab to a sourceTap a source
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FL-HP-01
HP / LP flare
- Category
- Flaring · Scope 1
- Method
- FLARE_COMP_V1
- Typical tier
- T3–T4 · flare meter with gas analysis
- Activity data
- Flare meter volumes per stream (routine, non-routine, purge and pilot) and gas composition
- Gases
- CO₂CH₄N₂O
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GTG-1
Gas turbine generators
- Category
- Stationary combustion · Scope 1
- Method
- COMB_GAS_MB_V1
- Typical tier
- T3 · fuel gas meter with monthly gas analysis
- Activity data
- Fuel gas volume at stated reference conditions, gas composition and heating value
- Gases
- CO₂CH₄N₂O
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DGS-1
Dry gas seal vent
- Category
- Venting · Scope 1
- Method
- VOLUME_COMP_V1
- Typical tier
- T3 · metered seal vent with gas analysis
- Activity data
- Seal vent volume at stated reference conditions and gas composition
- Gases
- CH₄CO₂
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CV-1
Cold vent
- Category
- Venting · Scope 1
- Method
- VOLUME_COMP_V1
- Typical tier
- T3 · vent meter or design rate × hours
- Activity data
- Vented whole-gas volume and gas composition
- Gases
- CH₄CO₂
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FUG-01
Valves, flanges & connectors
- Category
- Fugitives · Scope 1
- Method
- COUNT_EF_V1
- Typical tier
- T2 component counts, moving to measured LDAR surveys
- Activity data
- Component counts and operating hours, or leaks found in LDAR / OGI surveys
- Gases
- CH₄CO₂
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CT-01
Cargo tank flashing
- Category
- Venting · Scope 1
- Method
- VOLUME_COMP_V1
- Typical tier
- T3 · flash gas volume with vapour analysis
- Activity data
- Tank flashing volume and cargo tank vapour composition
- Gases
- CH₄CO₂
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EDG-1
Emergency diesel generator
- Category
- Stationary combustion · Scope 1
- Method
- COMB_LIQUID_NCV_V1
- Typical tier
- T3 · metered diesel consumption
- Activity data
- Diesel litres with density
- Gases
- CO₂CH₄N₂O
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REF-01
HVAC refrigerant
- Category
- Fugitives · Scope 1
- Method
- MASS_TOPUP_V1
- Typical tier
- Mass balance · refrigerant top-ups
- Activity data
- Refrigerant top-up and recovered kg
- Gases
- HFCs
- Standards
- GHG Protocol · ISO 14064-1
- Methods
- API Compendium · OGMP 2.0
- Onboarding target
- First dashboard in 1–2 weeks
The problem
Oil & gas emissions outgrew the spreadsheet.
Inventories built in Excel were fine for a corporate report. They struggle when regulators, verifiers and buyers start asking how each tonne was calculated.
- 01
Spreadsheets hide the engineering
Gas compositions pasted by hand, standard and normal cubic metres mixed up (about 5.5% apart), factors with no reference. Nobody can say which version produced last year's number.
- 02
Verification pressure is rising
Verifiers working to ISO 14064-3 and EU ETS rules want a trail from each reported tonne back to the meter, the gas analysis and the factor, not a folder of linked workbooks.
- 03
Methane is now regulated
OGMP 2.0 asks for source-level methane reporting, and the EU Methane Regulation adds measurement, LDAR and venting and flaring rules. Generic carbon tools model Scope 1 as fuel × factor.
How it works
From asset template to audited dashboard in four steps.
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Set up assets from templates
Choose a template such as a spread-moored FPSO, a fixed platform or an onshore gas plant. Typical systems and sources are filled in; you tailor meters, units, reference conditions and method tiers.
FPSO v1 · power, compression, flare, vents, cargo…
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Fill in generated Excel templates
Download workbooks generated from your own source register. Locked structure, unit dropdowns and validated cells, so every number lands in the right place.
ACTIVITY v1 · Activity · Compositions · Events · Energy
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Calculate per gas, with provenance
Imports are validated and previewed before commit. Each source is calculated with its versioned method, and results keep the meter reading, gas analysis, factor and library release.
FLARE_COMP_V1 · CO₂ · CH₄ · N₂O
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Dashboards & reports
Portfolio, asset and source views, flaring and methane dashboards, data-quality heatmaps, and ISO 14064-1 and GHG Protocol reports with your logo.
Scope 1 · Scope 2 LB / MB · intensity
- Scope 1
- 377 kt CO₂e
- CH₄
- 0.61 kt
- Data complete
- 97 %
- Stationary combustion
- Flaring
- Venting
- Fugitives
Provenance · FL-HP-01 · Mar
- ResultCO₂, CH₄, N₂O (t)
- Method
FLARE_COMP_V1 - ActivityFlare meter, Sm³ at 15 °C
- CompositionHP flare gas analysis
- FactorsLibrary release, reference & licence
- Source rowACTIVITY v1 workbook, approved
Source coverage
Every Scope 1 and Scope 2 source on an oil & gas asset.
Each category uses methods written for its physics, not a single fuel × factor shortcut.
- Scope 1 CO₂CH₄N₂O
Stationary combustion
Gas turbines, reciprocating engines, fired heaters, boilers, diesel generators, fire pumps
Carbon mass balance on fuel-gas composition; liquid fuels by net calorific value
COMB_GAS_MB_V1 · COMB_LIQUID_NCV_V1
- Scope 1 CO₂CH₄N₂O
Flaring
Routine HP/LP flaring, non-routine and safety events, purge and pilot gas, well test flaring
Flare volume and gas composition with combustion efficiency; events logged and classified
FLARE_COMP_V1
- Scope 1 CH₄CO₂
Venting
Cold vents, blowdowns, tanks and offloading, compressor seals, pneumatics, amine CO₂ vents
Whole-gas volume × composition, real-gas blowdown, count × factor, CO₂ mass balance
VOLUME_COMP_V1 · BLOWDOWN_PVT_V1 · COUNT_EF_V1 · LOADING_EF_V1 · AMINE_CO2_MB_V1
- Scope 1 CH₄CO₂HFCsSF₆
Fugitives
Equipment leaks from component counts or LDAR/OGI surveys, refrigerants, SF₆, fire suppression
Average factors through to measured leak rates; mass balance for top-ups
COUNT_EF_V1 · FUGITIVE_LDAR_V1 · MASS_TOPUP_V1
- Scope 1 CO₂CH₄N₂O
Mobile combustion
Owned or operated vehicles, vessels and helicopters
Fuel quantity × net calorific value × emission factor
COMB_LIQUID_NCV_V1
- Scope 2 CO₂CH₄N₂O
Purchased energy
Grid electricity including power-from-shore; purchased steam, heat and cooling
Location-based and market-based side by side, with certificates and residual mix
ELEC_DUAL_V1 · HEAT_STEAM_V1
Trust & verification
Built to be checked.
Your inventory ends up in regulatory submissions and investor reports. The platform is designed to support third-party verification to ISO 14064-3.
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Audit trail
Append-only log of changes, reporting periods that lock, and restatements when a locked period must change.
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Provenance to the meter reading
Every result links to its activity data, gas analysis, emission factor and reference, method version and library release.
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Tenant isolation
PostgreSQL row-level security on every client table, tested for cross-tenant leakage on every change. Platform staff cannot see your data by default.
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Data residency
Shared cloud, dedicated hosting in the EU, Middle East or Singapore, or self-hosted in your own infrastructure.
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Backups
Nightly encrypted off-site backups with a documented, tested restore procedure.
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No lock-in
Export your full tenant dataset, in Excel/CSV and JSON, whenever you want.
Regulatory packs
Standards always on. Regulations switched on per asset.
Packs layer versioned rules on the base standards, with presets suggested from each asset's country. An asset in the Netherlands suggests Base, OGMP 2.0, EU ETS and the EU Methane Regulation.
| Pack | What it adds | Suggested for | Status |
|---|---|---|---|
| Base GHG Protocol + ISO 14064-1 + IPIECA Scopes, boundaries, location- and market-based Scope 2, uncertainty, oil & gas source categories | Scopes, boundaries, location- and market-based Scope 2, uncertainty, oil & gas source categories | All clients | Always on |
| OGMP 2.0 Oil & Gas Methane Partnership 2.0 Source-level methane reporting and reporting-level tracking | Source-level methane reporting and reporting-level tracking | All oil & gas operators | Available |
| EU ETS EU Emissions Trading System (MRR) Monitoring-plan tiers and annual emissions report export | Monitoring-plan tiers and annual emissions report export | Installations in the EU / EEA | Available |
| EU Methane Regulation Regulation (EU) 2024/1787 LDAR frequency, venting and flaring restrictions, source-level measurement and reporting | LDAR frequency, venting and flaring restrictions, source-level measurement and reporting | Operators in the EU and suppliers to EU importers | Available |
| US EPA GHGRP 40 CFR 98 Subparts C & W Subpart W methods and e-GGRT export | Subpart W methods and e-GGRT export | US facilities | Available |
| Disclosure CDP, IFRS S2, ESRS E1 Output tables and narrative data points | Output tables and narrative data points | Listed and CSRD-reporting companies | Available |
| UK ETS UK Emissions Trading Scheme UK monitoring and reporting rules | UK monitoring and reporting rules | UK installations | Available |
| Australia NGER, Safeguard Mechanism, ASRS (AASB S2) NGER Methods 1–4 reporting, Safeguard baseline tracking, climate disclosures | NGER Methods 1–4 reporting, Safeguard baseline tracking, climate disclosures | Australian facilities | Available |
| New Zealand NZ ETS, Aotearoa NZ Climate Standards NZ ETS emissions returns and NZ CS climate disclosures | NZ ETS emissions returns and NZ CS climate disclosures | New Zealand facilities | Available |
Pack rules and official report templates are versioned and authored with subject-matter experts. Rolling out: on the roadmap, not yet generally available.
Delivery
Hosted your way, run by you or by us.
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Shared cloud
The standard multi-tenant platform, included in every plan.
For: Small and mid-size operators
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Dedicated
The same software on an isolated server and database, in your chosen region, managed by FEEC.
For: Enterprise, NOCs and data-residency rules
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Self-hosted
Run EmitLedger inside your own infrastructure under an annual licence.
For: Enterprise operators and national oil companies
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Managed service
FEEC process engineers run data collection, QA and reporting for you, on any hosting option.
For: Teams without in-house emissions capacity
FAQ
Questions operators ask us.
Who is EmitLedger for?
Oil & gas operators with a handful to a few dozen assets — FPSOs, platforms, gas plants, terminals and compressor stations — plus drilling and FPSO contractors who report to several clients, and consultancies that run inventories for others.
Do we have to give up Excel?
No. EmitLedger generates locked Excel templates from your own source register, one per asset and year. Your teams fill them in as they do today; the platform validates every cell, shows a preview of what changes, and returns a marked-up error report when something is wrong. Existing workbooks can be mapped once and imported every month.
Which calculation methods do you use?
Methods follow the API Compendium and OGMP 2.0 for oil & gas sources, with IPCC defaults as fallback, inside a GHG Protocol and ISO 14064-1 inventory. Each method is versioned, and every result records the method version, factors and gas composition used. See the methodology page for detail.
Can a verifier audit the numbers?
That is the point. Every result traces back to the meter reading or Excel row, the gas analysis, the emission factor and its reference, and the method version. The platform is designed to support third-party verification to ISO 14064-3, with read-only, time-limited verifier access.
Can we report with different GWP sets?
Yes. Results are stored as tonnes of each gas and converted to CO₂e when you report, so the same data can be reported with AR5 values for one programme and AR6 for another.
How is our data kept separate from other companies?
Every client is a separate tenant, and isolation is enforced in the database itself with PostgreSQL row-level security, backed by automated cross-tenant leakage tests on every change. Platform staff cannot see your emissions data by default. Dedicated and self-hosted options are available when you need them.
How long does onboarding take?
The target is a first dashboard within one to two weeks of kick-off, using asset templates (for example a spread-moored FPSO with gas export) and your base-year data.
Is EmitLedger certified to ISO 27001 or SOC 2?
Not yet, and we will not claim otherwise. We run a lightweight information-security management system from the start, and certification is on our roadmap. The security page describes the controls in place.
See your own asset in EmitLedger.
Bring a flare meter export or last year's inventory workbook. We will walk through it on a demo FPSO and show where every number comes from.