Changes in the chemistry of shallow groundwater related to the 2008 injection of CO2 at the ZERT field site, Bozeman, Montana

被引:210
作者
Kharaka, Yousif K. [1 ]
Thordsen, James J. [1 ]
Kakouros, Evangelos [1 ]
Ambats, Gil [1 ]
Herkelrath, William N. [1 ]
Beers, Sarah R. [1 ]
Birkholzer, Jens T. [2 ]
Apps, John A. [2 ]
Spycher, Nicholas F. [2 ]
Zheng, Liange [2 ]
Trautz, Robert C. [3 ]
Rauch, Henry W. [4 ]
Gullickson, Kadie S. [5 ]
机构
[1] US Geol Survey, Menlo Pk, CA 94025 USA
[2] Ernest Orlando Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA
[3] Elect Power Res Inst, Palo Alto, CA 94304 USA
[4] W Virginia Univ, Dept Geol & Geog, Morgantown, WV 26506 USA
[5] Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59717 USA
关键词
Geological carbon sequestration; Groundwater monitoring; Groundwater chemistry; Trace metals; Dissolved organics; WATER-ROCK INTERACTIONS; DEEP SALINE AQUIFERS; CARBON-DIOXIDE; SEDIMENTARY BASINS; CLIMATE-CHANGE; SEQUESTRATION; STORAGE; USA; SIMULATION; TRANSPORT;
D O I
10.1007/s12665-009-0401-1
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Approximately 300 kg/day of food-grade CO2 was injected through a perforated pipe placed horizontally 2-2.3 m deep during July 9-August 7, 2008 at the MSU-ZERT field test to evaluate atmospheric and near-surface monitoring and detection techniques applicable to the subsurface storage and potential leakage of CO2. As part of this multidisciplinary research project, 80 samples of water were collected from 10 shallow monitoring wells (1.5 or 3.0 m deep) installed 1-6 m from the injection pipe, at the southwestern end of the slotted section (zone VI), and from two distant monitoring wells. The samples were collected before, during, and following CO2 injection. The main objective of study was to investigate changes in the concentrations of major, minor, and trace inorganic and organic compounds during and following CO2 injection. The ultimate goals were (1) to better understand the potential of groundwater quality impacts related to CO2 leakage from deep storage operations, (2) to develop geochemical tools that could provide early detection of CO2 intrusion into underground sources of drinking water (USDW), and (3) to test the predictive capabilities of geochemical codes against field data. Field determinations showed rapid and systematic changes in pH (7.0-5.6), alkalinity (400-1,330 mg/l as HCO3), and electrical conductance (600-1,800 mu S/cm) following CO2 injection in samples collected from the 1.5 m-deep wells. Laboratory results show major increases in the concentrations of Ca (90-240 mg/l), Mg (25-70 mg/l), Fe (5-1,200 ppb), and Mn (5-1,400 ppb) following CO2 injection. These chemical changes could provide early detection of CO2 leakage into shallow groundwater from deep storage operations. Dissolution of observed carbonate minerals and desorptionion exchange resulting from lowered pH values following CO2 injection are the likely geochemical processes responsible for the observed increases in the concentrations of solutes; concentrations generally decreased temporarily following four significant precipitation events. The DOC values obtained are 5 +/- 2 mg/l, and the variations do not correlate with CO2 injection. CO2 injection, however, is responsible for detection of BTEX (e.g. benzene, 00.8 ppb), mobilization of metals, the lowered pH values, and increases in the concentrations of other solutes in groundwater. The trace metal and BTEX concentrations are all significantly below the maximum contaminant levels (MCLs). Sequential leaching of core samples is being carried out to investigate the source of metals and other solutes.
引用
收藏
页码:273 / 284
页数:12
相关论文
共 33 条
[1]  
[Anonymous], LBNL1251E
[2]   Screening and ranking of sedimentary basins for sequestration of CO2 in geological media in response to climate change [J].
Bachu, S .
ENVIRONMENTAL GEOLOGY, 2003, 44 (03) :277-289
[3]  
BENSON S, 2005, UNDERGROUND GEOLOGIC, P1
[4]   Monitoring of fluid-rock interaction and CO2 storage through produced fluid sampling at the Weyburn CO2-injection enhanced oil recovery site, Saskatchewan, Canada [J].
Emberley, S ;
Hutcheon, I ;
Shevalier, M ;
Durocher, K ;
Mayer, B ;
Gunter, WD ;
Perkins, EH .
APPLIED GEOCHEMISTRY, 2005, 20 (06) :1131-1157
[5]   The U-tube:: A novel system for acquiring borehole fluid samples from a deep geologic CO2 sequestration experiment -: art. no. B10203 [J].
Freifeld, BM ;
Trautz, RC ;
Kharaka, YK ;
Phelps, TJ ;
Myer, LR ;
Hovorka, SD ;
Collins, DJ .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2005, 110 (B10) :1-10
[6]  
Hem J.D., 1989, US GEOLOGICAL SURVEY, V3d, P1
[7]   Geologic storage of carbon dioxide as a climate change mitigation strategy: performance requirements and the implications of surface seepage [J].
Hepple, RP ;
Benson, SM .
ENVIRONMENTAL GEOLOGY, 2005, 47 (04) :576-585
[8]   An overview of the underground disposal of carbon dioxide [J].
Holloway, S .
ENERGY CONVERSION AND MANAGEMENT, 1997, 38 :S193-S198
[9]  
Hovorka S.D., 2006, ENV GEOSCIENCES, V13, P105, DOI DOI 10.1306/EG.11210505011
[10]  
*IPCC, 2007, WORK GROUP ASS REP