IFRS S2 for Oil & Gas in Mexico: 2026 Guide
IFRS S2 is the climate-specific standard adopted by CNBV as mandatory for all BMV and BIVA issuers starting January 2025, making Mexico the first country in North America to implement IASB's ISSB standards. Companies must report GHG emissions across all three scopes, conduct climate scenario analysis, and disclose how climate change impacts their strategy and financial model. Limited assurance of the report by an external auditor will be required starting with the 2027 reporting cycle.
The oil and gas sector has the highest stranded asset risk under IFRS S1 in Mexico. The combination of carbon pricing (potential Mexican tax of USD 3-5/tCO₂ in expansion) and IEA NZE 2050 scenarios implies reserve value impairment that must appear in financial notes. Pemex international bondholders already require ISSB-aligned disclosure, not just CNBV reporting.
Why IFRS S2 Applies Differently in Oil & Gas
Sustainability Director and corporate treasurer of oil, gas and hydrocarbon transport operators with debt issuances on BMV or international markets
Upstream methane: venting and flaring of associated gas in production fields is the largest fugitive Scope 1 source and SENER emission factors differ from OGMP 2.0 demanded by international bondholders
Critical IFRS S1 transition risk: exploration and production assets must be analyzed under IEA NZE 2050 scenario (oil demand falls 75% by 2050) — Pemex and IEnova have long-term liabilities the market already discounts
Massive Scope 3 category 11: combustion of oil and gas sold by customers represents 80-90% of total footprint — mandatory data under IFRS S2 that many have never calculated
Spills and environmental incidents: IFRS S1 requires disclosure of incidents with material financial impact — Pemex liabilities in Reforma and Ku-Maloob-Zaap are a high-exposure area
Critical IFRS S2 KPIs for Oil & Gas
| Required KPI | Data Source | Difficulty |
|---|---|---|
| Methane intensity: % of methane vented + flared over total gas produced (OGMP 2.0 benchmark: <0.2%) | Direct combustion (Scope 1) | High 🔴 |
| Upstream carbon intensity: tCO₂e per barrel of oil equivalent produced | Electricity bills (Scope 2) | High 🔴 |
| Number of spills >1 barrel and total volume spilled (barrels/year) | Cat 11 - Combustión de hidrocarburos vendidos (uso del producto) | High 🔴 |
| Flaring intensity rate: Mcf flared / Mbbl produced | HR / payroll system | Medium 🟡 |
| Scope 3 cat. 11: tCO₂e from combustion of sold hydrocarbons (by product: gasoline, diesel, natural gas) | ERP / accounting system | Medium 🟡 |
Hard-to-Collect Data in Oil & Gas
Associated gas venting and flaring rate per production field (Mcf/d): Pemex reports to SENER but not with OGMP Level 4 granularity requiring direct measurement methodology
Fugitive methane emissions in natural gas transport pipeline network: require LDAR inspection across thousands of km of pipeline with OGI infrared camera
Volume of oil spilled per incident, volume recovered and affected area broken down by event and basin
That is why manual Excel-based processes will not pass the 2027 assurance. Without automated traceability, an external auditor cannot verify the completeness or accuracy of emissions data.
Checklist: 8 Steps to Comply with IFRS S2 in Oil & Gas
- 1
Reporting of GHG emissions Scope 1, 2, and 3 (full value chain) in metric tons of CO₂ equivalent
- 2
Climate scenario analysis aligned to TCFD using at least 1.5°C and 2°C as reference pathways
- 3
Identification and quantification of physical risks (chronic and acute) and transition risks
- 4
Disclosure of emissions reduction targets, including net-zero goals with interim milestones
- 5
Description of how climate risks and opportunities affect business model, strategy, and cash flows
- 6
Connect data sources (ERP, meters, suppliers) to a centralized platform
- 7
Review with internal audit team and adjust consolidation perimeter
- 8
Generate report in CNBV/CINIF format ready for external assurance
How Climatta Automates IFRS S2 for Oil & Gas
Automated Collection
Eliminate spreadsheets in Oil & Gas. Climatta connects your systems and automatically collects Methane intensity: % of methane vented + flared over total gas produced and other critical KPIs.
Auditor-Grade Traceability
Every data point has source, date, and owner documented. The 2027 assurance auditor can trace every figure to its origin in your systems.
IFRS S2 Report Ready
Generates the report in the exact CNBV format — tables, metrics, and narrative. No last-minute manual reformatting.
Onboarding in 4 Weeks
Climatta connects to Oil & Gas systems in 4 weeks. No months-long IT project or external implementation consultant.
FAQ: IFRS S2 in Oil & Gas
Ready to comply with IFRS S2 in Oil & Gas?
Climatta centralizes all data collection, generates the report in regulatory format, and leaves it ready for 2027 external assurance. No spreadsheets.