Accession Number : AD0433107


Title :   STREAMING POTENTIAL MEASUREMENTS,


Descriptive Note : Y E.


Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE GEOPHYSICS LAB


Report Date : 08 Feb 1963


Pagination or Media Count : 27


Abstract : One of the electrical after-effects of undergound explosions may be a voltage signal produced by the flow of interstitial rock fluids under the resulting pressure gradient. This voltage-called the streaming potential--arises as the result of charge separation in the fluid as it flows through a porous, surface-active medium. The potentials developed by fifty samples of a wide variety of rocks have been measured. In rocks of moderately high permeability the fluid squeezed through may come from some distance away and hence may be of very different character than the interstitial fluid originally present in the rock. Therefore, part of this study has been in an attempt to understand the consequences of such pore fluid variations. In addition, some correlations have been attempted, relating the streaming potential to the rocks' geometrical properties. (Author)


Descriptors :   *ROCK , *VOLTAGE , FLUID FLOW , POROSITY , PERMEABILITY , BASALT , SANDSTONE , EXPERIMENTAL DATA , TABLES(DATA)


Distribution Statement : APPROVED FOR PUBLIC RELEASE