Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1720898115 |
Methane in groundwater before, during, and after hydraulic fracturing of the Marcellus Shale | |
Barth-Naftilan, E.; Sohng, J.; Saiers, J. E. | |
2018-07-03 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
![]() |
ISSN | 0027-8424 |
出版年 | 2018 |
卷号 | 115期号:27页码:6970-6975 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Concern persists over the potential for unconventional oil and gas development to contaminate groundwater with methane and other chemicals. These concerns motivated our 2-year prospective study of groundwater quality within the Marcellus Shale. We installed eight multilevel monitoring wells within bedrock aquifers of a 25-km(2) area targeted for shale gas development (SGD). Twentyfour isolated intervals within these wells were sampled monthly over 2 years and groundwater pressures were recorded before, during, and after seven shale gas wells were drilled, hydraulically fractured, and placed into production. Perturbations in groundwater pressures were detected at hilltop monitoring wells during drilling of nearby gas wells and during a gas well casing breach. In both instances, pressure changes were ephemeral (<24 hours) and no lasting impact on groundwater quality was observed. Overall, methane concentrations ([CH4]) ranged from detection limit to 70 mg/L, increased with aquifer depth, and, at several sites, exhibited considerable temporal variability. Methane concentrations in valley monitoringwells located above gaswell laterals increased in conjunction with SGD, but CH4 isotopic composition and hydrocarbon composition (CH4/C2H6) are inconsistent with Marcellus origins for this gas. Further, salinity increased concurrently with [CH4], which rules out contamination by gas phase migration of fugitive methane from structurally compromised gas wells. Collectively, our observations suggest that SGD was an unlikely source of methane in our valley wells, and that naturally occurring methane in valley settings, where regional flow systems interact with local flow systems, is more variable in concentration and composition both temporally and spatially than previously understood. |
英文关键词 | methane groundwater hydraulic fracturing shale gas water quality |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000437107000057 |
WOS关键词 | NORTHERN APPALACHIAN BASIN ; DRINKING-WATER WELLS ; GAS DEVELOPMENT ; NATURAL GASES ; NORTHEASTERN PENNSYLVANIA ; AQUIFERS ; CONTAMINATION ; MIGRATION ; OIL ; FIELD |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204948 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | Yale Univ, Sch Forestry & Environm Studies, New Haven, CT 06511 USA |
推荐引用方式 GB/T 7714 | Barth-Naftilan, E.,Sohng, J.,Saiers, J. E.. Methane in groundwater before, during, and after hydraulic fracturing of the Marcellus Shale[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(27):6970-6975. |
APA | Barth-Naftilan, E.,Sohng, J.,&Saiers, J. E..(2018).Methane in groundwater before, during, and after hydraulic fracturing of the Marcellus Shale.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(27),6970-6975. |
MLA | Barth-Naftilan, E.,et al."Methane in groundwater before, during, and after hydraulic fracturing of the Marcellus Shale".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.27(2018):6970-6975. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论