Contribution of logging tools to understanding helium porewater data across the Mesozoic sequence of the East of the Paris Basin

Battani, A.; Smith, Thomas; Robinet, Jean Charles; Brulhet, Jacques; Lavielle, B.; Coelho, D.

doi:10.1016/j.gca.2011.09.032

Cited by 17 publications

(16 citation statements)

References 40 publications

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“…Castro et al, 1998a;Torgersen and Clarke, 1985;Zhao et al, 1998). Helium profiles have been used to provide information on fluid flux in aquitards in Canada (Hendry et al, 2005), Switzerland (Mazurek et al, 2011;Rübel et al, 2002), France (Battani et al, 2011), and Belgium (Mazurek et al, 2011). Helium isotope measurements in aquifers above and below an extensive aquitard were used to investigate inter-aquifer exchange between the Trias and Dogger aquifers in the Paris Basin (Castro et al, 1998b;Marty et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Using excess 4He to quantify variability in aquitard leakage

Gardner

Harrington

Smerdon

2012

Journal of Hydrology

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Section: Introductionmentioning

confidence: 99%

Using excess 4He to quantify variability in aquitard leakage

Gardner

Harrington

Smerdon

2012

Journal of Hydrology

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“…Moreover, natural tracer profiles represent independent evidence for system understanding. Natural tracer profiles have been determined for anions (Cl 2 , Br 2 , I 2 ), water isotopes (d 18 O, d 2 H) and noble gases (mainly He, but also Ar) (Battani et al 2011;Mazurek et al 2011;Rebeix et al 2014).…”

mentioning

confidence: 99%

Measuring diffusion coefficients of dissolved He and Ar in three potential clay host formations: Boom Clay, Callovo-Oxfordian Clay and Opalinus Clay

Jacops

Maes

Bruggeman

2016

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For the long-term management of high-and intermediate-level radioactive waste and/ or spent fuel, many countries prefer disposal in a geological repository. In Belgium, Switzerland and France, argillaceous formations are being explored as potential host formations for this purpose. In this context, knowledge of the diffusion coefficient of He is relevant within two research areas: first, diffusion coefficients are used in safety calculations to evaluate the balance between gas generation (mainly H 2 ) and gas dissipation; and, second, the diffusion coefficients of He and Ar are needed in the diffusion models of natural tracers. Owing to the lack of data on the diffusion coefficients of He and Ar for the different clay host formations, diffusion experiments with dissolved He and Ar were performed on Boom Clay, Opalinus Clay and Callovo-Oxfordian Clay. Samples were confined in a diffusion cell, and diffusion coefficients were measured by using the double throughdiffusion technique. The diffusion coefficients (D p or D pore ) for He in Boom Clay, Callovo-Oxfordian Clay and Opalinus Clay are 12.6 × 10 210 , 4.51 × 10 210 and 7.13 × 10 210 m 2 s 21 , respectively. The diffusion coefficients for Ar in Boom Clay, Callovo-Oxfordian Clay and Opalinus Clay are 18.6 × 10 211 , 4.06 × 10 211 and 3.65 × 10 211 m 2 s 21 , respectively.

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“…But the calculated pore values are sometimes negative which is physically impossible (Boom Clay sample K2 and the four samples of the Eigenbilzen Sands). For these samples, the values of 0,exp and exp are within each other's error interval which means that in some cases 0,exp > exp , which leads according to expression (18) to negative pore values. For these samples, the difference in eff between the largest and smallest molecule is about one order of magnitude.…”

Section: The Effective Diffusion Coefficients and The Geometric Factomentioning

confidence: 79%

“…Secondly, naturally occurring noble gases such as He and Ar can act as natural tracers whose profiles can be used to constrain transport properties on the scale of the formation [18][19][20]. As diffusion is considered to be the dominant transport mechanism, it should be possible to represent these natural tracer profiles by diffusion models, but the availability of reliable diffusion coefficients for He and Ar is limited.…”

Section: Introductionmentioning

confidence: 99%

The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based Materials

et al. 2017

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In order to investigate in more detail the relation between the size of diffusing molecules and their diffusion coefficients (and geometric factors), diffusion experiments with gases of different size and tritiated water (HTO) have been performed on different clayey samples (Boom Clay, Eigenbilzen Sands, Opalinus Clay, Callovo-Oxfordian Clay, and bentonite with different dry densities). We observed that, for unreactive gases in clayey materials, the effective diffusion coefficient varies with the size of the diffusing molecule and this variation can be described by an exponential or a power law function. The variation of the geometric factor can also be described by an exponential function. The observed experimental relations can be used to estimate diffusion coefficients; by measuring experimentally in clay the effective diffusion coefficient of two unreactive dissolved gases with a different size, the diffusion coefficients of other dissolved gases (with a size in between the two measured gases) can be estimated by using the fitted exponential relationship.

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Contribution of logging tools to understanding helium porewater data across the Mesozoic sequence of the East of the Paris Basin

Cited by 17 publications

References 40 publications

Using excess 4He to quantify variability in aquitard leakage

Using excess 4He to quantify variability in aquitard leakage

Measuring diffusion coefficients of dissolved He and Ar in three potential clay host formations: Boom Clay, Callovo-Oxfordian Clay and Opalinus Clay

The Dependency of Diffusion Coefficients and Geometric Factor on the Size of the Diffusing Molecule: Observations for Different Clay-Based Materials

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