ISO/AWI 26725

Natural gas upstream area — Determination of hydrate crystal structures by laser Raman spectroscopy

Scope

This document specifies the method for determining the characteristic parameters of crystal structure of natural gas hydrates using laser Raman spectroscopy, including specific requirements for the principle, instruments, materials, operational procedures, and data processing. This document is applicable to the structural determination of both naturally occurring and laboratory-synthesized natural gas hydrate samples, as well as the calculation of cage occupancy and hydration number.