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.
Other articles related to "spontaneous potential, 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 ...
Famous quotes containing the words potential and/or spontaneous:
“And what is the potential man, after all? Is he not the sum of all that is human? Divine, in other words?”
—Henry Miller (18911980)
“They [creative children] ask more questions than most children. Theyre usually spontaneous and enthusiastic. Their ideas are unique and occasionally strike other kids as weird. Theyre independent. Not that they dont care at all what other kids think, but theyre able to do their thing despite the fact that their peers may think its strange. And they have lots and lots of ideas.”
—Silvia Rimm (20th century)