Fig. 3From: Natural gas extraction and artificial gas injection experiments in Opalinus Clay, Mont Terri rock laboratory (Switzerland)N2, CH4, C2H6, C3H8, i-C4H10, and n-C4H10 content measured in the gas circulating in BHT-1 borehole; logarithm scale; GC gas chromatography; analytical uncertainty is included within the symbol sizeBack to article page