Sources of methane emissions from natural gas and oil infrastructure

Natural gas and oil infrastructure accounts for over 20 per cent of global anthropogenic CH4 emissions. Methane gas emissions occur in all sectors of the natural gas and oil industries, from drilling and production, through to processing and transmission, to distribution and even end use as a fuel. The natural gas infrastructure is composed of five major segments: production, processing, transmission, storage and distribution. The oil industry CH4 emissions occur primarily from field production operations, such as venting gas from oil wells, oil storage tanks and production-related equipment. Table 13.1 provides a summary of country-specific CH4 emissions from oil and gas for 1990 and 2000 and expected emissions for 2010 for some of the largest producers.

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