Geochemical research
Section editor – PhD in geology and mineralogy Bazhenova T.K.
Article # 38_2008 submitted on 09/23/2008 displayed on website on 09/30/2008
20 p.
pdf  Сomposition, zoning and scales of gas generation during the katagenesis of organic matter of humic coals
The history of developing the model of gas generation during the katagenesis of organic matter of humic coals (the diapason of katagenesis gradations: peat - graphite; the depth of subsidence of deposits - to 9.0 km) is considered. The results of theoretical balance calculations of the scales and dynamics of gas generation have been correlated with the regularities of changing the structure of coals during katagenesis, with gas zoning and with the present gas potential of coal fields. Particular attention has been given to the regularities of methane generation. In accordance with the calculations, in transforming peat to graphite organic matter loses 62.8% of its mass, of them a share of methane comprises 15.8 wt. %. Five stages of increased generation of methane are established - biochemical, transformation of brown coals to hard coals, carbonification leap, transformation of hard coals to semi-anthracites and then - to anthracites. The developed model doesn't only reconstruct the general picture of gas generation but also forms the basis in estimating the forecast reserves of gas in deposits mainly with humic organic matter and in estimating the degree of work safety in coal mines
Key words: organic matter, humic coals, katagenesis, generation, gases, main phase of gas generation
article citation Rogozina E.A. Сomposition, zoning and scales of gas generation during the katagenesis of organic matter of humic coals // Neftegazovaya Geologiya. Teoriya I Praktika. – 2008. - V.3. - #3.- http://www.ngtp.ru/rub/1/38_2008.pdf