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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 Official Southeast Asia Charts (shortened to the Official SEA Charts) are a collection of record charts launched in 2025 by the International Federation of the Phonographic Industry (IFPI). Based on data from BMAT , the charts reflect the 20 most- streamed songs in six Southeast Asian (SEA) countries: Indonesia , Malaysia , the Philippines ...
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The Philippine Statistics Authority (Filipino: Pangasiwaan ng Estadistika ng Pilipinas; PSA) is the central statistical authority of the Philippine government that collects, compiles, analyzes, and publishes statistical information on economic, social, demographic, political affairs, and general affairs of the people of the Philippines, as well as enforcing the civil registration functions in ...
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Sangguniang Panlalawigan (abbreviated as SP; lit. ' provincial council ' ), commonly known as the Provincial Board , are the legislatures in Philippine provinces . They are the legislative branches of the provinces, and their powers and responsibilities are defined by the Local Government Code of 1991. [ 1 ]