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ISO/DIS 25426

Natural gas — Upstream area — Determination of porosity of shale by helium pycnometry

General information

Current stage: 40.00 Effective date: Apr 9, 2026

Originator: ISO

Owner: ISO/TC 193/SC 3

Type: International Standard

ICS: 75.060

Scope

Standardization of the principle, equipment and material requirements, sampling, experimental steps, data calculation and report of determination of porosity of shale by helium pycnometry.
This document can be used for resource evaluation, fine characterization of reservoirs, reserve calculation, target selection, etc. in shale gas exploration and development.

Life cycle

NOW

IN_DEVELOPMENT
ISO/DIS 25426
40.00 DIS registered
Apr 9, 2026