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Spontaneous potential log, commonly called the self potential log or SP log, is a passive measurement taken by oil industry well loggers to characterise rock formation properties. The log works by measuring small electric potentials (measured in millivolts) between depths with in the borehole and a grounded electrode at the surface.
As established earlier, static SP is defined as follow: SSP = −K log (R mfe /R we) Static SP (SSP) can be obtained directly from the SP curve if the bed is clean, thick, porous, permeable, and only moderately invaded. When these conditions are not met, the recorded SP will need to be corrected. Various correction charts are available for this ...
The upper cluster has two roughly parallel curvy plots using S&P 500 Monthly $ MAXIMUM values for the upper line and $ MINIMUM values for the lower line 1/1950 to latest on chart. The upper cluster has 2 straight lines a Best Fit Upper, and Best Fit Lower, which in effect represent one line with thickness or separation, value see chart legend.
The list of number-one albums in Spain from 1969 to 1979 is derived from the Top 100 España record chart published weekly by PROMUSICAE (Productores de Música de España), a non-profit organization composed by Spain and multinational record companies.
This lists the singles that reached number one on the Spanish PROMUSICAE sales and airplay charts in 2023. Total sales correspond to the data sent by regular contributors to sales volumes and by digital distributors.
Pages for logged out editors learn more. Contributions; Talk; ... This is a list of number-one hits in Spain by year from the chart compiled weekly by PROMUSICAE. [1 ...
HTML and XML provide ways to reference Unicode characters when the characters themselves either cannot or should not be used. A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name.
Pages for logged out editors ... Printable version; ... Appearance. move to sidebar hide. This is a list of the Spanish Singles number-ones of 1969. [1] ...