Coal and shale desorption

Desorption of coal samples (cores) and shale is the basic empirical method used to determine the amount and composition of gas in coal (coal bed methane) and in shale (shale gas).

Stationary Laboratory

Stationary laboratory consists of three sections:

Core processing section

Its main tasks are:

  • photo documentation

    • UV photography

    • digital photography
  • lithological description

  • core preservation

  • selection of core samples for residual gas analysis

  • preparation and handover of core for further analyses

Laboratory analyses section

Its main tasks are:

  • analysis of core density  using

    • helium method

    • water method

  • residual gas analysis

  • collection of residual gas for qualitative and quantitative analyses

  • sorption isotherm analysis

The following analyses are carried out in co-operation with other laboratories:

  • composition of desorbed gas  

  • composition of residual gas 

  • isotope composition of desorbed gas

  • isotope composition of residual gas

  • proximate analysis 

  • elementary analysis of coal  

  • TOC

  • vitrinite reflectance  

  • maceral composition 

  • mineral composition

  • ash and moisture content in a sample after residual gas analysis

  • moisture content

  • total sulphur content

  • sulphur content in a

  • Rock Eval pyrolitic analysis

  • X-Ray analysis  

  • porosity

  • permeability

Report section

Its main tasks are:

  • calculation of lost gas for collected core samples

  • drawing up reports

    • preliminary report

    • desorption report


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