Methane and ethane emission quantifications from onshore oil and gas sites in Romania, using a tracer gas dispersion method

Site-specific methane (CH4) and ethane (C2H6) emission rates from the onshore oil gas (O&G) sector in Romania were quantified, using mobile tracer dispersion method. As part of coordinated Romanian Methane Emission Oil & Gas measurement campaign, this study supported investigation CH4 emissions O&G around Bucharest. measured at 200 sites highly skewed with a heavy tail described by factor (EF) 95% confidence interval (CI) equal to 0.53 [0.32; 0.79] kg h–1 site–1. Of investigated sites, 53% showed below 1 h–1, whereas only 6% had higher than 80 highest being 297 h–1. wells not correlated production but negatively amount wastewater produced. C2H6 95 which EF CI 0.07 [0.04; 0.13] Almost 80% 7% them 9 78 EFs representing specific types geographical regions are provided manuscript. In terms magnitude distribution, these results line published measurements North America, natural field Netherlands. The calculated is close lower range majority values literature, lowest among literature values. also site-specific C2H6-to-CH4 molar ratios different