Static self potential

Input(s)

$t_{C l}$: Chlorine Anion Transference Number (dimensionless)

$\mathrm{R}$: Gas Constant $(\mathrm{J} /$ degree $\mathrm{C})$

$T_{a}$: Absolute Temperature (degree K)

F: Faraday Constant (96485.336) (s A/mol)

$a_{w}$: Activity of $\mathrm{NaCl}$ (dimensionless)

$a_{m f}$: Activity of Dilute Solution (dimensionless)

Output(s)

$\mathrm{K}$: Equilibrium Constant $(\mathrm{mV})$

$E_{s s p}$: Static Self Potential (V)

Formula(s)

$$ \begin{gathered} K=4.606 * t_{C l} *\left(R * \frac{T_{a}}{F}\right) \\ E_{s s p}=-K * \log \left(\frac{a_{w}}{a_{m f}}\right) \end{gathered} $$

Reference(s)

Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 6, Page: 131-132.