ISO/NP 26651-2

Natural gas upstream area — Determination of shale gas content — Part 2: Determination of adsorbed gas content using static volumetric method

Scope

This standard specifies a method for determining the adsorbed gas content and desorbed gas volume of dry-basis and equilibrium moisture shale samples by using the static volumetric method. This standard specifies the principle of the method, apparatus and materials, sample preparation, test procedures, data processing, rounding of test results, precision requirements, and test report. This standard is applicable to the determination of the adsorbed gas content of shale samples under reservoir conditions. It is also applicable to the determination of the desorbed gas volume as free gas converted from adsorbed gas due to formation pressure reduction during shale gas production.