Temperature dependence of electrical resistivity of water‐saturated rocks

1987 ◽  
Author(s):  
Francisco J. Llera ◽  
Motoyuki Sato ◽  
Katsuto Nakatsuka ◽  
Hidekichi Yokoyama
Keyword(s):  
Electrical Resistivity ◽  
Temperature Dependence ◽  
Water Saturated

On: “Temperature dependence of the electrical resistivity of water‐saturated rocks” by F. J. Llera, M. Sato, K. Nakatsuka, and H. Yokoyama (GEOPHYSICS, 56, 576–585, May 1990)

Geophysics ◽  
1991 ◽  
Vol 56 (6) ◽  
pp. 884-884
Author(s):  
Hilton B. Evans
Keyword(s):  
Electrical Resistivity ◽  
Temperature Dependence ◽  
A Value ◽  
Water Saturated

Perhaps I missed something in this paper by Llera et al., but the data presented in their Table 1, their saturating fluid resistivity and Archie’s relationship [their equation (1)] do not seem to be consistent. For example, the authors give the saturating solution resistivity [Formula: see text] to be 70 Ω⋅m at 20° C, which is about 60 Ω⋅m at 30° C using the plots of Figure 4, p. 580; and on p. 582, the authors suggest a value of m = 2.0 for the cementation exponent. Sample 1 in Table 1 gives the rock resistivity (ρϕ) at 30° C to be 30 Ω⋅m and the porosity (ϕ) is 4.5 percent; then, using the Archie relationship, we would expect one of the following if a = 1.0.

TEMPERATURE DEPENDENCE BEHAVIOR OF ELECTRICAL RESISTIVITY IN NOBLE METALS AT LOW TEMPERATURES

2014 ◽  
Vol 5 (3) ◽  
pp. 982-992 ◽  
Author(s):  
M AL-Jalali
Keyword(s):  
Experimental Data ◽  
Electrical Resistivity ◽  
Temperature Dependence ◽  
Concentration Dependence ◽  
Low Temperatures ◽  
Noble Metals ◽  
Phonon Scattering ◽  
Theoretical Models ◽  
Residual Resistivity ◽  
Electron Phonon Scattering

Resistivity temperature – dependence and residual resistivity concentration-dependence in pure noble metals(Cu, Ag, Au) have been studied at low temperatures. Dominations of electron – dislocation and impurity, electron-electron, and electron-phonon scattering were analyzed, contribution of these mechanisms to resistivity were discussed, taking into consideration existing theoretical models and available experimental data, where some new results and ideas were investigated.

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