Better satellites and other aerial survey data has determined that oil and gas related methane emissions are far, far higher than industry reports. Everywhere independent researchers look along the production, transmission, distribution and end use pipeline they find more leakage than has been assumed because industry has provided the numbers the assumptions are based on for years.
Along some particularly leaky production paths methane emissions are so great that the impact is greater than coal over 100 year timescale. For example, some parts of NM Permian have a 9% (!) leakage rate. When combusted methane releases about half the amount of CO2 that coal does. The eGHG potential of methane is 20x CO2 over 100 year timescale, so you have to add 180% to the total GHG potential, making it 40% worse than coal w/o even considering other leakage along the pipeline.
Along some particularly leaky production paths methane emissions are so great that the impact is greater than coal over 100 year timescale. For example, some parts of NM Permian have a 9% (!) leakage rate. When combusted methane releases about half the amount of CO2 that coal does. The eGHG potential of methane is 20x CO2 over 100 year timescale, so you have to add 180% to the total GHG potential, making it 40% worse than coal w/o even considering other leakage along the pipeline.
https://sustainability.stanford.edu/news/methane-leaks-are-f...