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  2. Electrode array - Wikipedia

    Schlumberger (Wenner) Wenner alpha; Wenner beta; Wenner gamma; Pole-pole; Dipole-dipole; Pole-dipole; Equatorial dipole-dipole; Resistivity. Resistivity measurement of bulk materials is a frequent application of electrode arrays. The figure shows a Wenner array, one of the possible ways of achieving this.

  3. Schlumbergera - Wikipedia

    Schlumbergera is a small genus of cacti with six to nine species found in the coastal mountains of south-eastern Brazil.These plants grow on trees or rocks in habitats that are generally shady with high humidity, and can be quite different in appearance from their desert-dwelling cousins.

  4. Paal Kibsgaard - Wikipedia

    Kibsgaard started his career with ExxonMobil in 1992, and joined Schlumberger in 1997. He became its CEO in August 2011, succeeding Andrew Gould, who retired as chairman and CEO. He was replaced by Oliver Le Peuch in August 2019. Under his leadership, the company laid off approximately 70,000 employees in less than three years.

  5. Casing (borehole) - Wikipedia

    Casing is a large diameter pipe that is assembled and inserted into a recently drilled section of a borehole.Similar to the bones of a spine protecting the spinal cord, casing is set inside the drilled borehole to protect and support the wellstream.

  6. Well logging - Wikipedia

    Conrad developed the Schlumberger array, which was a technique for prospecting for metal ore deposits, and the brothers adapted that surface technique to subsurface applications. On September 5, 1927, a crew working for Schlumberger lowered an electric sonde or tool down a well in Pechelbronn, Alsace, France creating the first well log.

  7. OLGA (technology) - Wikipedia

    In March 2012, Schlumberger announced an agreement with Altor Fund II for the acquisition of SPT Group. The acquisition was completed in Q2. SPT Group, founded in 1971, was headquartered in Norway employing approximately 280 people in 11 countries at the time of the acquisition.

  8. Petroleum trap - Wikipedia

    An anticline is an area of the subsurface where the strata have been pushed into forming a domed shape. If there is a layer of impermeable rock present in this dome shape, then hydrocarbons can accumulate at the crest until the anticline is filled to the spill point - the highest point where hydrocarbons can escape the anticline.

  9. Formation evaluation gamma ray - Wikipedia

    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.