Scope 1 & 2 emissions accounting · Oil & gas
Emissions accounting, engineered 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. Built by the process engineers at FEEC.
Jan 2024 – Dec 2025 · all assets · AR5
Data completeness 97%- Total emissions
- 66,159 t CO₂e
- Scope 1
- 64,203 t
- Scope 2 (LB)
- 1,956 t
Monthly trend · t CO₂e
- Source categories
- 6
- Versioned calculation methods
- 12
- Regulatory & disclosure packs
- 14
- Engineering asset templates
- 3
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.
Built by FEEC
Built by process engineers, not a software shop.
EmitLedger is a product of FEEC, an independent upstream and midstream engineering consultancy. Its principal consultants design and review the systems that produce these emissions: flare and relief networks, blowdown, compression, gas treatment and fuel-gas systems.
- Founded
- 2020
- Principal consultants
- 4
- Years of combined experience
- 100+
- FEEC projects delivered
- 20+
- Countries
- 12+
- HAZID and HAZOP engagements
- 50+
Company facts as published on feec.asia.
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Flare, vent and blowdown physics
Methods use gas composition, combustion efficiency and depressuring behaviour, because that is how flare and blowdown studies are done.
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Metering and reference conditions
Every meter carries its reference conditions and units. Standard and normal cubic metres are converted explicitly, never assumed.
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Verification-ready records
Engineering deliverables are checked and issued under document control. EmitLedger keeps the same discipline for emissions, with provenance and an append-only audit log.
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Help from the people who wrote the methods
Onboarding, managed inventories, verification support and emission-reduction studies are delivered by FEEC engineers, not a reseller.
How it works
From asset template to audited dashboard in four steps.
Set up once from an engineering template, keep collecting data in Excel, and let the platform do the calculation and the record-keeping.
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Set up assets from templates
Choose a template such as an 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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Review, lock and report
Periods move through submit, review, approve and lock. Dashboards, compliance checks and ISO 14064-1 and GHG Protocol reports come from the same locked numbers.
Scope 1 · Scope 2 LB / MB · intensity
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
-
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
-
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
-
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
Product tour
One platform, from the meter to the verifier.
The illustrations below follow the real screens of the EmitLedger web app, filled with the fictional demo tenant "Demo Energy Ltd".
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01 Dashboards
See the portfolio, then drill down to the source.
Executive overview, by country, by asset, asset drill-down to system and equipment, source categories, flaring and venting, methane, energy, data quality and targets.
- Filter by period, scope, category, gas, GWP set and Scope 2 method
- Intensity per barrel of oil equivalent, methane and flaring intensity
- Data completeness shown next to every total
Jan 2024 – Dec 2025 · all assets · AR5
Data completeness 97%- Total emissions
- 66,159 t CO₂e
- Scope 1
- 64,203 t
- Scope 2 (LB)
- 1,956 t
Monthly trend · t CO₂e
Asset ranking · t CO₂e
- Demo FPSO Alpha 38,412
- Demo Platform Bravo 17,655
- Demo Gas Plant Charlie 10,092
Illustration of the executive overview for the fictional demo tenant, Jan 2024–Dec 2025. Not client data. -
02 Excel import
Keep Excel. Lose the errors.
Templates are generated from your source register. Uploads are checked for structure, units, ranges, compositions and month-on-month jumps, then previewed before anything is saved.
- Coded findings such as E020 (composition outside 100 ± 0.5 mol%) and W030 (month-on-month change)
- Download your own workbook back with the problem cells marked
- Macros never run; files are parsed in an isolated worker
Validated · 0 errors, 3 warningsACTIVITY_v1_Demo-FPSO-Alpha_2025.xlsx
Demo FPSO Alpha · reporting year 2025
- Uploaded
- Validating
- Validated
- Committed
Validation findings Code Cell Finding W030 Activity!H14 FL-HP-01 routine flaring: month-over-month change above the warning threshold W021 Compositions!F9 HP flare gas analysis normalised (sum 99.7 mol%) W031 Activity!K22 EDG-1 diesel: blank month for an active stream Commit import Download marked-up workbookIllustration of an import job for the fictional Demo FPSO Alpha. Finding codes are the platform's real validation codes. -
03 Governance
Periods that lock, changes that leave a trail.
Each asset and month moves from open to submitted, reviewed, approved and locked. Changing a locked month needs an approved restatement, and every change lands in the audit log with before and after values.
- Roles for data providers, reviewers, methodology owners and executives
- Evidence attached to periods and restatements
- Free, read-only and time-limited access for external verifiers
Period status per asset and month, reporting year 2025 Asset Jul Aug Sep Oct Nov Dec FPSO Alpha Locked Locked Appr. Rev. Subm. Open Platform Bravo Locked Locked Appr. Appr. Rev. Open Gas Plant Charlie Locked Appr. Rev. Subm. Open Open - Open
- Submitted
- Reviewed
- Approved
- Locked
Audit log · latest
Period approved · Demo FPSO Alpha · Sep 2025 · reviewed → approved
Restatement completed · Demo Platform Bravo · Mar–Apr 2025 · periods relocked
Illustration of the monthly approval board for the fictional demo assets: submit → review → approve → lock. -
04 Compliance packs
Rule checks for each programme you report under.
Switch packs on per asset, with presets suggested from the asset's country. Each pack runs its rule checks for the reporting year and shows pass, warning or fail with the reason.
- Base, OGMP 2.0, EU Methane Regulation, EU ETS, UK ETS, US EPA GHGRP
- Australia NGER, Safeguard and ASRS; New Zealand ETS and Climate Standards
- CDP, IFRS S2 and ESRS E1 disclosure tables
Jan 2025 to Dec 2025 · GWP AR6
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Base
Pass2 passed · 0 failed · 0 not applicable
- Pass: Every source category with active sources has reported results.
- Pass: Activity data is 97 % complete (minimum 95 %).
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OGMP 2.0
Warnings5 passed · 1 warning · 0 not applicable
- Pass: CH₄ results are reported for the asset's sources.
- Pass: Every source is mapped to a level.
- Warnings: 1 fugitive source(s) below quality tier 3.
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EU Methane Regulation
Pass8 passed · 0 failed · 0 not applicable
- Pass: GWP set AR6 matches the required AR6.
- Pass: Every equipment leak (LDAR) source has reported results.
Illustration of rule checks for packs active on the fictional Demo FPSO Alpha. Rule counts follow the pack definitions. -
05 Reports & exports
Reports built from locked, traceable numbers.
Request a GHG inventory report as PDF, GHG tables in Excel, a full calculation audit export for verifiers or a regulatory pack export. Reports are generated in the background and kept for download.
- ISO 14064-1 inventory report with your logo
- Audit export with inputs, factors and method versions
- Full tenant export (ZIP) at any time
Request a report
Request report- GHG inventory report (PDF) All assets · 2025 · ISO 14064-1 Ready
- GHG tables (Excel) All assets · 2024–2025 Ready
- Audit export (Excel) Demo FPSO Alpha · 2025 Running
- Regulatory pack export OGMP 2.0 · 2025 Queued
- Full tenant export (ZIP) Client administrators Ready
Illustration of report jobs for the fictional demo tenant. Reports are generated in the background. -
06 Mobile field app Rolling out
Readings and events captured where they happen.
Offline field entry for meter readings, flaring and blowdown events and LDAR findings with photo and GPS, plus dashboards, approvals and notifications.
- One app for all clients
- Works offline and syncs when back in coverage
- Approvals and notifications on the move
Illustration of the mobile field app with fictional values. The app is rolling out.
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
Solutions
Built around the assets you operate.
Asset templates and source lists for floating, offshore and onshore facilities, and a multi-client setup for contractors and consultancies.
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01
FPSOs and FSOs
Floating production and storage
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.
Asset template available
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02
Offshore platforms
Fixed platforms and MOPUs
Turbine-driven power and compression, a flare, cold vents and blowdowns, pneumatic controllers and diesel-driven cranes and fire pumps.
Asset template available
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03
Onshore gas plants
Processing, boosting and treatment
Gas engine compressors, amine acid-gas removal, glycol dehydration, fired heaters, a flare and grid electricity in one facility.
Asset template available
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04
Terminals and LNG
Storage, loading and liquefaction
Tank and loading losses, vapour handling, flares and power for storage terminals and export facilities, including liquefaction trains.
Set up from the source register
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05
Drilling and service contractors
Rigs, well testing and fleets
Diesel-driven rigs, well test flaring and owned vessels or vehicles, reported to operators and to your own corporate inventory.
Set up from the source register
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06
ESG and engineering consultancies
Inventories run for several clients
Consultancies that prepare inventories for operators get multi-client consultant access, the same methods and audit trail for every client, and a partner margin.
Set up from the source register
Regulations
Standards always on. Regulations switched on per asset.
Packs layer versioned rule checks 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.
Base standards
Emissions trading & mandatory reporting
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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Hosting options
Shared cloud, dedicated hosting managed by FEEC with the region agreed in your order form, or self-hosted in your own infrastructure.
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Backups
Encrypted nightly backups with a 24-hour recovery point objective, weekly integrity checks and monthly restore tests.
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No lock-in
Export your full tenant dataset in Excel/CSV and JSON whenever you want.
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, managed by FEEC.
For: Enterprises, NOCs and teams with 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), drilling and FPSO contractors who report to several clients, and consultancies that run inventories for others.
Who is behind EmitLedger?
EmitLedger is developed and operated by FEEC (Front End Engineering Consultancy Limited), an independent upstream and midstream engineering consultancy registered in Hong Kong. Its principal consultants work on FEED, process simulation, process safety, EC&I and project delivery for oil & gas facilities, and the same engineering practice shapes the calculation methods.
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 workbook when something is wrong. Existing workbooks can be mapped once with the mapping wizard 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. The methodology page has the detail.
Which regulations and disclosure frameworks are covered?
Packs are available for OGMP 2.0, the EU Methane Regulation, EU ETS, UK ETS, US EPA GHGRP, Australia NGER, the Safeguard Mechanism and ASRS, New Zealand ETS and Climate Standards, and CDP, IFRS S2 and ESRS E1. Each pack adds rule checks and an export. You remain responsible for your official submissions.
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. External verifiers get read-only, time-limited accounts, free on every plan, and a full calculation audit export.
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 an asset template and your base-year data. FEEC engineers can run the onboarding for you.
Can FEEC help us reduce emissions, not only report them?
Yes. Emissions reporting and abatement studies are part of FEEC's engineering work, alongside flare, relief and blowdown studies and brownfield modifications. Studies are scoped and quoted separately from the subscription.
Is there a mobile app?
The field app for offline meter readings, events and LDAR findings, with approvals and notifications, is rolling out. It is included in Professional and Enterprise.
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.
EmitLedger by FEEC
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.