Spontaneous Potential

Spontaneous Potential

Spontaneous potential (SP), also called self potential, is a naturally occurring electric potential difference in the Earth, measured by an electrode relative to a fixed reference electrode. Spontaneous potentials are often measured down boreholes for formation evaluation in the oil and gas industry, and they can also be measured along the Earth's surface for mineral exploration or groundwater investigation. The phenomenon and its application to geology was first recognized by Conrad Schlumberger, Marcel Schlumberger, and E.G. Leonardon in 1931, and the first published examples were from Russian oil fields.

Read more about Spontaneous Potential:  Physics, Applications in Boreholes, Applications On The Surface, Interpretation, Measurement Technique, See Also, External Links

Other articles related to "spontaneous potential, potential":

Well Logging - Wireline Logging - Lithology Logs - Self/Spontaneous Potential
... See also Spontaneous potential logging The Spontaneous Potential (SP) log measures the natural or spontaneous potential difference between the borehole and the surface, without any applied current ... It was one of the first wireline logs to be developed, found when a single potential electrode was lowered into a well and a potential was measured relative to a fixed reference electrode at the surface ... The most useful component of this potential difference is the electrochemical potential because it can cause a significant deflection in the SP reponse opposite permeable beds ...

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