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  Information - MPRG14 Self-Potential (SP) Measurements: Applications and Interpretations

Event Information
The goal of this session is to gather contributions from a wide range of approaches focusing on Self-Potential method, including laboratory measurements, field observations, and modeling, and to point out their implications for the geophysicists community.

Self-potential (SP) and electrical measurements performed in field can be produced by a streaming potential as a consequence of fluid pressure gradient; by a thermoelectric potential as a consequence of a temperature gradient; by a chemical potential as a consequence of a chemical gradient; or by these effects possibly acting together.
SP observations are often performed to detect fluid flow in soil, and are used for hydrogeological and geothermal prospecting. The SP observations have also important consequences for environmental and volcanic risk. Moreover some rock properties such as permeability or fracture aperture can be estimated by the borehole electrokinetic response due to water injection.
Recent advances on seismo-electromagnetic techniques and theory, using the transient streaming potential, are very promising in term of charaterisation of the physico-chemical properties of porous media, and detection of small changes in rock properties (permeability, saturation state) at interfaces.
However the interpretation of the temporal variations of self-potential in term of fluid flow rate variations, aquifer hydraulic properties, rainfall infiltration, or seimo-magnetic conversions, is still difficult. Contributions on theory,laboratory measurements, and analogue models of SP temporal variations on the one hand, forward and inverse modelling of SP data on the other hand, are needed. Moreover the search of the key parameters on the electrokinetic sources, as electrical conductivity, fluid geochemistry, partial saturation, CO2 flow rate, is still debating. We therefore invite contributions on all these aspects of the Self-Potential method, and hope that this session bring together a large community.

Preliminary List of Solicited Speakers

Prof. T. Ishido : Volcano monitoring using self-potential technique
P. Pézard et al.: A new downhole sensor for in-situ measurements of spontaneous potential


General Statement
The information contained hereafter has been compiled and uploaded by the Session Organizers via the "Organizer Session Form". The Session Organizers have therefore the sole responsibility that this information is true and accurate at the date of publication, and the conference organizer cannot accept any legal responsibility for any errors or omissions that may be made, and he makes no warranty, expressed or implied, with regard to the material published.

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