@article{Glover:2012:10.1190/GEO2011-0364.1,
author = {Glover, PWJ and Walker, E and Jackson, MD},
doi = {10.1190/GEO2011-0364.1},
journal = {Geophysics},
pages = {D17--D43},
title = {Streaming-potential coefficient of reservoir rock: A theoretical model},
url = {http://dx.doi.org/10.1190/GEO2011-0364.1},
volume = {77},
year = {2012}
}

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TY  - JOUR
AB  - The streaming potential is that electrical potential whichdevelops when an ionic fluid flows through the pores of a rock.It is an old concept that is recently being applied in many fieldsfrom monitoring water fronts in oil reservoirs to understandingthe mechanisms behind synthetic earthquakes. We have carriedout fundamental theoretical modeling of the streaming-potentialcoefficient as a function of pore fluid salinity, pH, and temperatureby modifying the HS equation for use with porous rocksand using input parameters from established fundamental theory(the Debye screening length, the Stern-plane potential, the zetapotential, and the surface conductance). The model also requiresthe density, electrical conductivity, relative electric permittivityand dynamic viscosity of the bulk fluid, for which empiricalmodels are used so that the temperature of the model may bevaried. These parameters are then combined with parametersthat describe the rock microstructure. The resulting theoreticalvalues have been compared with a compilation of data for siliceousmaterials comprising 290 streaming-potential coefficientmeasurements and 269 zeta-potential measurements obtainedexperimentally for 17 matrix-fluid combinations (e.g., sandstonesaturated with KCl), using data from 29 publications.The theoretical model was found to ably describe the main featuresof the data, whether taken together or on a sample by samplebasis. The low-salinity regime was found to be controlled bysurface conduction and rock microstructure, and was sensitiveto changes in porosity, cementation exponent, formation factor,grain size, pore size and pore throat size as well as specific surfaceconductivity. The high-salinity regime was found to be subjectto a zeta-potential offset that allows the streaming-potentialcoefficient to remain significant even as the saturation limit isapproached
AU  - Glover,PWJ
AU  - Walker,E
AU  - Jackson,MD
DO  - 10.1190/GEO2011-0364.1
EP  - 43
PY  - 2012///
SN  - 1942-2156
SP  - 17
TI  - Streaming-potential coefficient of reservoir rock: A theoretical model
T2  - Geophysics
UR  - http://dx.doi.org/10.1190/GEO2011-0364.1
UR  - http://hdl.handle.net/10044/1/23775
VL  - 77
ER  - 

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