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Standards Development
This standard specifies methodologies for leak detection and repair (LDAR) programs in upstream oil and gas operations, including but not limited to oil and natural gas exploration, production, gathering (including subsea), initial processing (e.g., separation) and liquefaction. Emissions from inactive wells, temporarily plugged wells, and permanently plugged and abandoned wells are in scope. This standard may be used for regulatory compliance, auditing, and voluntary emission reductions.
The scope of this standard includes the applicability perimeter, the LDAR workflow, detection methodologies, data collection, leak quantification, leak repair and verification, quality assurance, and LDAR reporting. The standard considers both component-level LDAR and area/site-level LDAR, covering a broad range of handheld, remote sensing, and continuous monitoring approaches.
This standard does not include prescriptive detection equipment specifications or calibration procedures, requirements for methane reduction targets or emission thresholds.
Methane is a powerful but short-lived climate pollutant that accounts for a third of net warming since the Industrial Revolution. Rapidly reducing methane emissions can achieve near-term gains in the efforts for decisive action and is regarded as the single most effective strategy to keep the goal of limiting warming to 1.5˚C within reach while yielding co-benefits, including improving public health and agricultural productivity.
Several initiatives have been launched to reduce methane emissions generally as the Global Methane Pledge launched at COP26 or specifically in the energy sector as the Oil & Gas Methane Partnership 2.0 (OGMP 2.0).
One element to reduce methane emissions is to quantify them. ISO 25624-1 is addressing this quantification, in line with OGMP 2.0. Another element is Leak Detection And Repair (LDAR), addressed in this document. The third element is to avoid flaring and venting: ISO 25624-3 is addressing this aspect.
The European Commission has published in 2024 the Regulation 2024/1787 on the reduction of methane emissions in the energy sector. The ISO 25624 series will support this regulation and give guidance to audit the compliance of operators in oil and gas production and liquefaction. A similar series is developed in CEN/TC 234, Gas infrastructure, for the transmission, distribution, underground storage and regasification of natural gas. ISO/TC 67/SC9 and CEN/TC 234 have cooperated to have consistent standards.
This document was developed to be consistent with national or regional legislations and complement them.
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