Digitale Medien
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
63 (1988), S. 4832-4840
ISSN:
1089-7550
Quelle:
AIP Digital Archive
Thema:
Physik
Notizen:
We find the formula σ=φm[σω+AQv/ (1+CQv/σw)] that embodies the fact that the rock conductivity σ is a nonlinear function of water conductivity σw, can fit data on 140 cores rather well with m≈2, A=1.93×m (mho/m)(l/mol) and CQv=0.7 (mho/m). The observed curvature at low salinity is due to an interplay of tortuosity and water conductivity. Empirical correlation shows that m increases with the clay content, as the tortuosity increases with the clay content. Thus, the conductivity of a fully water saturated clay bearing (shaly) sand is completely determined from porosity φ, charge density Qv, and water conductivity σw.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.340476
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