Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR022612 |
Monitoring Stray Natural Gas in Groundwater With Dissolved Nitrogen. An Example From Parker County, Texas | |
Larson, Toti E.1; Nicot, Jean-Philippe1; Mickler, Patrick1; Castro, M. Clara2; Darvari, Roxana1; Wen, Tao2,3; Hall, Chris M.2 | |
2018-09-01 | |
发表期刊 | WATER RESOURCES RESEARCH
![]() |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:9页码:6024-6041 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Concern that hydraulic fracturing and natural gas production contaminates groundwater requires techniques to attribute and estimate methane flux. Although dissolved alkane and noble gas chemistry may distinguish thermogenic and microbial methane, low solubility and concentration of methane in atmosphere-equilibrated groundwater precludes the use of methane to differentiate locations affected by high and low flux of stray methane. We present a method to estimate stray gas infiltration into groundwater using dissolved nitrogen. Due to the high concentration of nitrogen in atmospheric-recharged groundwater and low concentration in natural gas, dissolved nitrogen in groundwater is much less sensitive to change than dissolved methane and may differentiate groundwater affected high and low flux of stray natural gas. We report alkane and nitrogen chemistry from shallow groundwater wells and eight natural gas production wells in the Barnett Shale footprint to attribute methane and estimate mixing ratios of thermogenic natural gas to groundwater. Most groundwater wells have trace to nondetect concentrations of methane. A cluster of groundwater wells have greater than 10 mg/L dissolved methane concentrations with alkane chemistries similar to natural gas from the Barnett Shale and/or shallower Strawn Group suggesting that localized migration of natural gas occurred. Two-component mixing models constructed with dissolved nitrogen concentrations and isotope values identify three wells that were likely affected by a large influx of natural gas with gas:water mixing ratios approaching 1:5. Most groundwater wells, even those with greater than 10-mg/L methane, have dissolved nitrogen chemistry typical of atmosphere-equilibrated groundwater suggesting natural gas:water mixing ratios smaller than 1:20. Plain Language Summary Hydraulic fracturing, horizontal drilling, and associated natural gas production have dramatically changed the energy landscape across America over the past 10 years. Along with this renaissance in the energy sector has come public concern that hydraulic fracturing may contaminate groundwater. In this study we measure the chemistry of dissolved gas from shallow groundwater wells located above the Barnett Shale natural gas play, a tight gas reservoir located west of the Dallas-Fort Worth Metroplex. We compare groundwater chemistry results to natural gas chemistry results from nearby production wells. Most groundwater wells have trace to nondetectible concentrations of methane, consistent with no measurable infiltration of natural gas into shallow groundwater. A cluster of groundwater wells have greater than 10 mg/L dissolved methane concentrations with alkane chemistries similar to natural gas. Using dissolved nitrogen and alkane concentrations and their stable isotope ratios in combination with chemical mixing models, we conclude that natural gas transported from the shallower Strawn Group affected these groundwater wells rather than natural gas from the deeper Barnett Shale, which is the target of hydraulic fracturing in this area. These results suggest that hydraulic fracturing has not affected shallow groundwater drinking sources in this area. |
英文关键词 | methane groundwater dissolved gas hydraulic fracturing natural gas contamination |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448088100011 |
WOS关键词 | MISSISSIPPIAN BARNETT SHALE ; FORT-WORTH BASIN ; DRINKING-WATER WELLS ; NORTH-CENTRAL TEXAS ; ISOTOPIC COMPOSITION ; GEOCHEMICAL CHARACTERIZATION ; METHANE CONCENTRATIONS ; INORGANIC CARBON ; MARCELLUS SHALE ; AQUIFERS |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
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/19942 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Texas Austin, Bur Econ Geol, Austin, TX 78713 USA; 2.Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI 48109 USA; 3.Penn State Univ, Earth & Environm Syst Inst, University Pk, PA 16802 USA |
推荐引用方式 GB/T 7714 | Larson, Toti E.,Nicot, Jean-Philippe,Mickler, Patrick,et al. Monitoring Stray Natural Gas in Groundwater With Dissolved Nitrogen. An Example From Parker County, Texas[J]. WATER RESOURCES RESEARCH,2018,54(9):6024-6041. |
APA | Larson, Toti E..,Nicot, Jean-Philippe.,Mickler, Patrick.,Castro, M. Clara.,Darvari, Roxana.,...&Hall, Chris M..(2018).Monitoring Stray Natural Gas in Groundwater With Dissolved Nitrogen. An Example From Parker County, Texas.WATER RESOURCES RESEARCH,54(9),6024-6041. |
MLA | Larson, Toti E.,et al."Monitoring Stray Natural Gas in Groundwater With Dissolved Nitrogen. An Example From Parker County, Texas".WATER RESOURCES RESEARCH 54.9(2018):6024-6041. |
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