Graph showing the sources of methane from oil production since 1980. Click to enlarge. ©Höglund-Isaksson 2017
Global methane and ethane emissions from oil production from 1980 to 2012 were far higher than previous estimates show, according to a new study which for the first time takes into account different production management systems and geological conditions around the world. Methane is a potent greenhouse gas, which scientists rank as the second-most important contributor to climate change after CO2. Yet while methane concentrations in the atmosphere can be easily measured, it is difficult to determine the contribution of different sources, whether human or natural.
“In an oil reservoir, there is a layer of gas above the oil which has a methane content of 50 to 85%...
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