Deep Fluids in the Continents: I. Sedimentary Basins

Kharaka, Yousif K.; Hanor, Jeffrey S.

doi:10.1016/b0-08-043751-6/05085-4

Cited by 187 publications

(314 citation statements)

References 183 publications

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“…Obviously, many other organics could warrant attention. Such compounds include carboxylic acids, which are commonly present at much higher concentrations (up to 5,000 mg/L) in oil field brines (Kharaka and Hanor, 2007) and are also expected in deep saline aquifers. Although these compounds are essentially nontoxic, they are good ligands for metal complexation, and their mobilization could exacerbate the release of trace metals upon an SCC leakage into fresh water.…”

Section: Organics Of Concern Properties and Selection Of Key Compoundmentioning

confidence: 99%

“…Benzene concentrations in water produced from oil fields have been extensively reported (RøeUtvik, 1999;Witter and Jones, 1999), in some cases with BTEX concentrations as high as 60 mg/L (Kharaka and Hanor, 2007). Usually, the concentrations of hydrocarbons such as benzene dissolved in oil field brines have been studied with the objectives of (1) determining if the hydrocarbon content of the sampled brine can be used to determine whether an exploratory well is close to a petroleum accumulation, and (2) providing information to help answer more fundamental questions concerning the origin, migration, and accumulation of petroleum (McAuliffe, 1969).…”

Section: Benzene Content In Aqueous and Solid Phases In Deep Saline Amentioning

confidence: 99%

“…Less work has been conducted with respect to potential impact on groundwater from organic constituents and co-injectants such as H 2 S. For example, while the possible extraction of organic compounds by supercritical CO 2 in deep reservoirs is a well-known phenomenon (e.g., Kharaka and Hanor, 2007), the potential for groundwater contamination from mobilized organic constituents transported to shallow aquifers has not been studied to date, to our knowledge. The effect of co-injected H 2 S on mineral trapping of CO 2 and mineralogical alteration of reservoir host rocks has been studied previously (Gunter et al, 2000 and2005;Knauss et al, 2005;Xu et al, 2007), but with focus on the geochemical evolution in the storage formation at relatively high temperature and pressure (T>70 o C, P>150 bar).…”

Section: Introductionmentioning

confidence: 99%

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Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems

Zheng¹,

Spycher²,

Xu³

et al. 2010

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Section: Organics Of Concern Properties and Selection Of Key Compoundmentioning

confidence: 99%

Section: Benzene Content In Aqueous and Solid Phases In Deep Saline Amentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems

Zheng¹,

Spycher²,

Xu³

et al. 2010

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“…The chemical and isotopic compositions of formation water are widely applied in sedimentary basins to study the origins, evolution, and hydrogeological conditions. However, the origin and evolution of formation water are still being debated [8,9]. Generally speaking, origins of formation water have previously been attributed to meteoric water, evaporation concentrated seawater, or halite dissolution [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Origin and Evolution of Formation Water in Buried Hill of Jizhong Depression, China, Using Multivariate Statistical Analysis of Geochemical Data

Zeng

2017

Geofluids

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Groundwater samples from buried hill of Jizhong Depression were evaluated using two statistical analyses: hierarchical cluster analysis (HCA) and principal component analysis (PCA). The samples were classified into four clusters, C1-C4, in HCA and the hydrochemical types of C1-C4 are HCO 3 -Na, Cl⋅HCO 3 -Na, Cl-Na, and Cl-Na⋅Ca. From C1 to C2, C3, and C4, the water-rock interaction becomes increasingly intensive, and rNa/rCl gets lower while total dissolved solids and r(Cl-Na)/rMg get higher. Three components of PCA explain 86.87% of the variance. Component1 (PC1), characterized by highly positive loadings in Na + and Cl − , is related to evaporation concentration. Component2 (PC2) is defined by highly positive loading in HCO 3 − and is related to influence of atmospheric water. With high positive loadings in Ca 2+ and high negative loadings in Na + and SO 4 2− , component3 (PC3) suggests plagioclase albitization. The combination of HCA and PCA within the hydrogeological contexts allowed the division of study area into five dynamic areas. From recharge area to discharge area, the influence of atmospheric water gets weaker and water-rock interactions such as evaporation concentration and plagioclase albitization become intensive. Therefore groundwater in buried hill showed paths of hydrochemical evolution, from C1, to C2, C3, and C4. Buried hill reservoir in Jizhong Depression is mainly distributed in hydrodynamic blocking and discharge area; therefore the two regions can be the favorable areas for petroleum migration.

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“…relevance in these systems not only because it is very toxic, but also because deep formation 11 fluids often carry elevated amounts of the natural radioactive isotope 210 Pb (an intermediate 12 decay product of the uranium-238 series) with a half-life of 22.2 years (Takahashi et al 1987). 13 In presence of sulphate, sulphide, carbonate, or oxide, Pb 2+ forms some hardly soluble salts 14 (e.g. PbSO 4 , PbS, PbCO 3 , PbO) thereby removing the Pb from the aqueous phase.…”

mentioning

confidence: 99%