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Current is injected through the outer electrodes and potential is measured between the inner electrodes. An electrode array is a configuration of electrodes used for measuring either an electric current or voltage. Some electrode arrays can operate in a bidirectional fashion, in that they can also be used to provide a stimulating pattern of ...
Comparison of Linear, Concave, and Convex Functions In original (left) and log10 (right) scales. In science and engineering, a log–log graph or log–log plot is a two-dimensional graph of numerical data that uses logarithmic scales on both the horizontal and vertical axes. Power functions – relationships of the form – appear as straight ...
Marguerite de Witt-Schlumberger (20 January 1853 – 23 October 1924) was a French campaigner for pronatalism, alcoholic abstinence, and feminism. She was the president of the French Union for Women's Suffrage ( Union française pour le suffrage des femmes / UFSF) movement. [1] She married into the Schlumberger family and became a powerfully ...
A drill stem test (DST) is a procedure for isolating and testing the pressure, permeability and productive capacity of a geological formation during the drilling of a well. The test is an important measurement of pressure behaviour at the drill stem and is a valuable way of obtaining information on the formation fluid and establishing whether a ...
The formation evaluation gamma ray log is a record of the variation with depth of the natural radioactivity of earth materials in a wellbore. Measurement of natural emission of gamma rays in oil and gas wells are useful because shales and sandstones typically have different gamma ray levels. Shales and clays are responsible for most natural ...
Logarithmic scale. of the Internet host count over time shown on a logarithmic scale. A logarithmic scale (or log scale) is a method used to display numerical data that spans a broad range of values, especially when there are significant differences between the magnitudes of the numbers involved. Unlike a linear scale where each unit of ...
Schlumberger has always invested significant time and money on research and engineering as a long-term strategy to support and grow its technology leadership. Short-term business cycles do not affect this. In 2005, we invested $505 million in R&D for our oilfield activities.
William Schlumberger (March 25, 1799 – February 20, 1838) was an Alsatian chess master. He is known to have taught Pierre Charles Fournier de Saint-Amant to play chess and as the operator of The Turk , a chess-playing machine which was purported to be an automaton .