Norm

ISO/DIS 18871:2015 en

Bepalingsmethode voor steenkoolgasgehalte

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Over deze norm

Status Ontwerp
Aantal pagina's 26
Commissie Gas- en oliewinning en -productie
Gepubliceerd op 20-01-2015
Taal Engels
This standard provides methodology for measuring coalbed methane content of coal core samples obtained by coring or sidewall coring during well drilling. The standard can be also applied to drill cuttings samples, if the equipment for the determination of the coalbed methane content according to a respective national standard is not available.. The selection of the most appropriate method shall consider the purpose of the test and the possibilities of sampling. This standard is applicable for the direct method of measuring coalbed methane content. It includes sample preparation, experimental procedures and calculation methods. Indirect methods of measuring gas content of coal (not included in this standard) are generally based on either the gas sorption characteristics of coal under defined/specified pressure and temperature conditions. This standard includes three types of direct measuring methods: conventional desorption (slow desorption) of core samples, fast desorption of core samples, fast desorption from cuttings or lump samples. The difference between them lies in the time allowed for gas to desorb before final crushing and in sample size and shape. This standard is applicable for the determination of the methane content of coal during coal and coalbed methane exploration. For the determination of free gas content of low rank coals is included. Procedure of free gas content determination of low rank coals should be defined. All units used and referred to in this standard are international standard units. Reference temperature, is 0 °C (273.15 K) if not stated differently. Reference pressure is 0.1 MPa (1 bar) if not stated differently. This standard does not point out all the potential safety hazards associated with its use. The users are responsible for establishing appropriate safety measures and health practices when applying the procedures defined in this standard.

Details

ICS-code 73.020
Nederlandse titel Bepalingsmethode voor steenkoolgasgehalte
Engelse titel Method of determining coalbed methane content
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