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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.
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Logarithmic Chart's Interesting Interpretations Firstly the upper cluster S&P 500 plots including inflation follow a straight line percentage gain much better than those without; therefore inflation somehow evens out the ups (over-performance) and downs (under-performance) of the S&P 500 without inflation.
Johnson's new chart of national emblems. Print showing the flags of various countries, those flown by ships, and the "Signals for Pilots." In the top left corner is the "United States" 37-star flag, in the top right corner is the "Royal Standard of the United Kingdom Great Britain & Ireland"; in the bottom left corner is the "Russian Standard ...
Issue Date Song Artist 2 January "Zombie" Ororo: 9 January 16 January 23 January "Dancing with Tears in My Eyes" Cabballero 30 January "Zombie" Ororo 6 February 13 February "No More I Love You's"
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.