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 Romanian oil fields.
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Spontaneouspotentials are often measured down boreholes for formation evaluation in the oil and gas industry, and they can also be measured along the...
Spontaneous symmetry breaking is a spontaneous process of symmetry breaking, by which a physical system in a symmetric state spontaneously ends up in an...
Spontaneouspotential log, commonly called the self potential log or SP log, is a passive measurement taken by oil industry well loggers to characterise...
logging cables down in the well. This led to the discovery of the spontaneouspotential (SP) which was as important as the ability to measure resistivity...
Spontaneous human combustion (SHC) is the pseudoscientific concept of the spontaneous combustion of a living (or recently deceased) human body without...
Different types of potentials result from stimuli of different modalities and types. Evoked potential is distinct from spontaneouspotentials as detected by...
standard reduction potential less than −0.76 V (e.g. H2 (−2.23 V), Na+ (−2.71 V), Li+ (−3.05 V)). In a galvanic cell, where a spontaneous redox reaction drives...
neurons, action potentials result from an external stimulus. However, some excitable cells require no such stimulus to fire: They spontaneously depolarize...
technique that uses direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially important as a stage...
Self-propelled (disambiguation) Soft-point bullet, a type of ammunition Spontaneouspotential differences in the Earth Stated Preference, a choice modelling method...
from higher chemical potential to lower chemical potential is accompanied by a release of free energy. Therefore, it is a spontaneous process. Another example...
Spontaneous fission (SF) is a form of radioactive decay in which a heavy atomic nucleus splits into two or more lighter nuclei. In contrast to induced...
of the spontaneous electrical activity of the brain. The biosignals detected by EEG have been shown to represent the postsynaptic potentials of pyramidal...
near -60 mV—more depolarized voltages would lead to spontaneous generation of action potentials. Immature or undifferentiated cells show highly variable...
primary spontaneous pneumothorax is one that occurs without an apparent cause and in the absence of significant lung disease. A secondary spontaneous pneumothorax...
evaluate the direction of spontaneous changes and the magnitude of the driving force behind them. Electrochemical potential Electrolytic cell Electromotive...
Miscarriage, also known in medical terms as a spontaneous abortion, is the death and expulsion of an embryo or fetus before it can survive independently...
potential of surfaces, which is important in the fields of colloid and interface science. In geology, measurements of related spontaneouspotential are...
There is a negative sign because a spontaneous reaction has a negative Gibbs free energy ΔG and a positive potential E. The Gibbs free energy is related...
specialized conductive muscle cells of the heart to generate spontaneous cardiac action potentials. Automaticity can be normal or abnormal, caused by temporary...
most widely used NN potentials are the Paris potential, the Argonne AV18 potential, the CD-Bonn potential, and the Nijmegen potentials. A more recent approach...
damage that could be or has been caused. Implied causality refers to spontaneously reported AE cases where the causality is always presumed to be positive...
logging methods Caliper Density Gamma ray Mud Resistivity Sonic Spontaneouspotential Logging while drilling (LWD) Measurement while drilling (MWD) Nuclear...
Spontaneous trait inference is the term utilised in social psychology to describe the mechanism that causes individuals to form impressions of people...
logging methods Caliper Density Gamma ray Mud Resistivity Sonic Spontaneouspotential Logging while drilling (LWD) Measurement while drilling (MWD) Nuclear...
while the rest of the collected light is dispersed onto a detector. Spontaneous Raman scattering is typically very weak; as a result, for many years...
logging methods Caliper Density Gamma ray Mud Resistivity Sonic Spontaneouspotential Logging while drilling (LWD) Measurement while drilling (MWD) Nuclear...
have the quickest rate of spontaneous depolarization, thus they initiate action potentials the quickest. The action potential generated by the SA node...
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