Abstract
On the basis of data of the geological-prospecting work and subject investigations it was possible to study geological factors of the hydrocarbon gases accumulation in coalbeds of deep levels of the lviv-Volyn coal basin. The peculiarities of the occurrence of the majority of commercial coalbeds and enclosing rocks in the methane-nitrous gas zone (a zone of gas weathering) were characterized as well as the reasons of the rize of this natural phenomenon were explained. A predictive appraisal was given for the resources of hydrocarbon gases in coalbeds occurred in the methane gas zone of the field.
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