气候变化领域集成服务门户(CCPortal): A portrait of wellbore leakage in northeastern British Columbia; Canada

CCPortal

DOI	10.1073/pnas.1817929116
	A portrait of wellbore leakage in northeastern British Columbia; Canada
	Wisen J.; Chesnaux R.; Werring J.; Wendling G.; Baudron P.; Barbecot F.
发表日期	2020
ISSN	0027-8424
起始页码	913
结束页码	922
卷号	117 期号:2
英文摘要	Oil and gas well leakage is of public concern primarily due to the perceived risks of aquifer contamination and greenhouse gas (GHG) emissions. This study examined well leakage data from the British Columbia Oil and Gas Commission (BC OGC) to identify leakage pathways and initially quantify incident rates of leakage and GHG emissions from leaking wells. Three types of leakage are distinguished: "surface casing vent flow" (SCVF), "outside the surface casing leakage" (OSCL), and "cap leakage" (CL). In British Columbia (BC), the majority of reported incidents involve SCVF of gases, which does not pose a risk of aquifer contamination but does contribute to GHG emissions. Reported liquid leakage of brines and hydrocarbons is rarer. OSCL and CL of gas are more serious problems due to the risk of long-term leakage from abandoned wells; some were reported to be leaking gas several decades after they were permanently abandoned. According to the requirements of provincial regulation, 21, 525 have been tested for leakage. In total, 2, 329 wells in BC have had reported leakage during the lifetime of the well. This represents 10.8% of all wells in the assumed test population. However, it seems likely that wells drilled and/or abandoned before 2010 have unreported leakage. In BC, the total GHG emission from gas SCVF is estimated to reach about 75, 000 t/y based on the existing inventory calculation; however, this number is likely higher due to underreporting. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	British Columbia; Greenhouse gas emissions; Shale gas; Wellbore leakage
语种	英语
scopus关键词	hydrocarbon; ground water; natural gas; well water; aquifer; Article; British Columbia Oil and Gas Commission; Canada; cap leakage; carbon footprint; ecosystem restoration; environmental monitoring; environmental parameters; greenhouse gas; offshore oil industry; organization; outside the surface casing leakage; priority journal; surface casing vent flow; waste disposal; wellbore leakage; air pollution; British Columbia; environmental monitoring; geology; oil and gas field; permeability; water pollutant; Air Pollution; British Columbia; Environmental Monitoring; Geology; Greenhouse Gases; Groundwater; Natural Gas; Oil and Gas Fields; Permeability; Water Pollutants, Chemical; Water Wells
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/161090
作者单位	Wisen, J., Département des Sciences Appliquées, Université du Québec à Chicoutimi, Chicoutimi, QC G7H3P7, Canada; Chesnaux, R., Département des Sciences Appliquées, Université du Québec à Chicoutimi, Chicoutimi, QC G7H3P7, Canada; Werring, J., David Suzuki Foundation, Vancouver, BC V6K4S2, Canada; Wendling, G., GW Solutions, Nanaimo, BC V9T0H2, Canada; Baudron, P., Département des Génie Civil, Géologique et Mines, Polytechnique Montréal, Montréal, QC H3T1J4, Canada; Barbecot, F., Département des Sciences de la Terre, Université du Québec à Montréal, Montréal, QC H2L2C4, Canada
推荐引用方式 GB/T 7714	Wisen J.,Chesnaux R.,Werring J.,et al. A portrait of wellbore leakage in northeastern British Columbia; Canada[J],2020,117(2).
APA	Wisen J.,Chesnaux R.,Werring J.,Wendling G.,Baudron P.,&Barbecot F..(2020).A portrait of wellbore leakage in northeastern British Columbia; Canada.Proceedings of the National Academy of Sciences of the United States of America,117(2).
MLA	Wisen J.,et al."A portrait of wellbore leakage in northeastern British Columbia; Canada".Proceedings of the National Academy of Sciences of the United States of America 117.2(2020).