prEN ISO 25624-1

Methane emissions in upstream oil and gas operations — Part 1: Quantification prEN ISO 25624-1

Scope

This document specifies methodologies for measurement and reporting of methane emissions from upstream oil and gas assets including oil and natural gas exploration and production, oil and natural gas gathering and processing and LNG liquefaction. It provides guidelines for verification. Emissions from inactive wells, temporarily plugged wells, and permanently plugged and abandoned wells are in scope. This document provides guidance for source-level and site-level quantification (including uncertainty estimation) and reconciliation, enabling a undertaking-specific annualized estimate. This document may be used for auditing, verification, and regulatory compliance purposes.
This document includes guidance for use of direct measurement, modelling, engineering estimates, representative studies, and emission factor generation. It describes the practical challenges associated with methane quantification from subsea infrastructure. It includes providing guidance on data conditioning, source category delineation, source category mapping, sample size determination, and annualization.
This document does not include methane reduction targets or cover coal, LNG, midstream, downstream or shipping. It also does not include detailed descriptions of measuring equipment, calibration procedures, or specific measurement methods.

Related legislation

Legislation related to this standard