Temperature‐dependent streaming potentials: 1. Theory

Abstract

[1] The variation of streaming potentials (voltage/pressure cross-coupling coefficient) with temperature is examined with particular emphasis on the effect of temperature on zeta potentials. The variation of streaming potential with temperature cannot be explained solely by the known temperature dependence of water viscosity, permittivity, and conductivity; the change of zeta potential with temperature must also be included. Many previous experimental studies show that the magnitude of the zeta potential increases with temperature. It was found in this study that the increase is controlled primarily by the surface charge density. These changes are influenced by the absorption properties of the surface and thus the surface charge, which in turn affects the Stern layer charge and properties of the electrical double layer. It is found that the slope of the temperature versus zeta potential curve is controlled by the change in enthalpy of the surface reactions. It was also found that viscosity is the most dominant term in the coupling coefficient, but changes in the conductivity model used to determine zeta potentials can also affect streaming potential coupling coefficient results. For the cases studied, the temperaturedependent zeta potential is determined by the temperature-dependent behavior of the Debye-Hückel parameter, 4%; the diffuse layer of electrical double layer (EDL), 6%; and the surface charge, 90%. The Revil and Glover model was able to account for much of the change in the surface charge density caused by changes in temperature.

Frequency-Dependent Streaming Potential of Porous Media—Part 2: Experimental Measurement of Unconsolidated Materials

“…In this equation ΔP (Pa) is the fluid pressure difference, ε (F/m) is the dielectric constant of the fluid, η f (Pa.s) is the dynamic viscosity of the fluid, ζ (V) is the zeta potential, ΔV (V) is the streaming potential, σ f (S/m) is the electrical conductivity of the bulk fluid, Σ s (S) is the specific electrical conductance of the surface (i.e., that due to the double layer), σ (S/m) is the electrical conductivity of the mobile fluid, and Λ (m) is a characteristic length associated with the microstructure of the pore network [14][15][16][17][18]. The steady-state streaming potential is independent of the sample geometry.…”

Streaming potentials at hydrocarbon reservoir conditions

“…However, for silica surfaces in contact with predominantly NaCl brine (the situation in most hydrocarbon reservoirs) the zeta potential is observed to increase with temperature (Ishido and Mizutani, 1981;Revil et al, 1999). Here we follow a procedure complementary to that of Reppert and Morgan (2003a), examining each of the components of the streaming-potential coupling coefficient and its dependence on both temperature and salinity, and using this information to develop a model for the coupling coefficient. The electric conductivity, viscosity, and permittivity of the formation water have well-known relationships to salinity and temperature.…”

A Comparison of Self-Potential Tomography with Electrical Resistivity Tomography for the Detection of Abandoned Mineshafts

“…These can include diffusion-, electrofiltration-, mineral-, thermal-, bioelectric-and streaming potentials. Although recent advances have been made by studying these effects in isolation (Titov et al, 2002;Reppert and Morgan, 2003;Naudet et al, 2003;Guichet et al, 2003), the decoupling of the various SP mechanisms is not trivial . Due to the wide use of SP surveying in mineral exploration, many existing analysis techniques tend to fit data to forward models representing isolated mineral deposits.…”