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Techlog is a Schlumberger owned Windows based software platform intended to aggregate all the wellbore information. It allows the user to interpret any log and core data. It addresses the need for a single platform able to support all the wellbore data and interpretation integration workflows, reducing the need for a multitude of highly specialized tools.
Resistivity logging is a method of well logging that works by characterizing the rock or sediment in a borehole by measuring its electrical resistivity. Resistivity is a fundamental material property which represents how strongly a material opposes the flow of electric current. In these logs, resistivity is measured using four electrical probes ...
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.
The Schlumberger brothers called this technique an "Electrical Survey", but the more common name "well log" was coined a few years later in the United States. At that time, Pechelbronn was the only oil field known in France. On 28 July 1928, the owners of the oil field signed a contract with the Schlumberger company to do
Schlumberger. Schlumberger NV ( French: [ʃlumbɛʁʒe, ʃlœ̃b-] ), doing business as SLB, also known as Schlumberger Limited, [2] is an American oilfield services company. [3] [4] As of 2022, it is both the world's largest offshore drilling company and the world's largest offshore drilling contractor by revenue.
Sonic logging is a well logging tool that provides a formation’s interval transit time, designated as , which is a measure of a how fast elastic seismic compressional and shear waves travel through the formations. Geologically, this capacity varies with many things including lithology and rock textures, most notably decreasing with an ...
Doll came to the United States in 1941 and became an American citizen in 1962. His marriage with Annette Schlumberger ended in divorce. His second wife was the ballerina Eugenia Delarova, who was once married to the choreographer Léonide Massine. References. Wayback Machine; Search Results - Schlumberger Oilfield Glossary; Obituary in New York ...
ln (r) is the standard natural logarithm of the real number r. Arg (z) is the principal value of the arg function; its value is restricted to (−π, π]. It can be computed using Arg (x + iy) = atan2 (y, x). Log (z) is the principal value of the complex logarithm function and has imaginary part in the range (−π, π].