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Schlumberger Brothers
Conrad Schlumberger (2 October 1878 in Gebweiler ( Alsace-Lorraine) – 9 May 1936 in Stockholm) and Emile Henry Marcel Schlumberger (21 June 1884 in Gebweiler – 9 May 1953 in Val-Richer) were brothers from the region of Alsace-Lorraine, France, then a part of the German Empire. Their inventions in the area of geophysics and well logging were the beginnings of Schlumberger Well Services and the entire well logging industry. Life and work Conrad and Marcel were two of six children of an affluent Alsatian Protestant family. Their father, Paul, was descended from a wealthy cotton weaving family. Their mother, Marguerite De Witt, was a political activist. When the brothers were born, their native province Alsace was part of Germany. Their parents decided to send the brothers to Paris to be educated. Both Conrad and Marcel were educated at the top engineering schools in France; Conrad graduated from École Polytechnique in 1900, whereas Marcel graduated from École Centrale ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gebweiler
Guebwiller (french: Guebwiller, ; Alsatian: ''Gàwiller'' ; ) is a commune in the Haut-Rhin department in Grand Est currently in north-eastern France. It was a sub-prefecture of the department until 2015. It is situated northwest of Mulhouse at the foot of the Vosges mountains. The ''Ballon de Guebwiller'', the highest point in the Vosges, lies to the west of the town. In 2018, Guebwiller had a population of 11,022 and its urban area had a population of 28,662. History Guebweiler, as Gebweiler, is mentioned as early as 774. It belonged to the religious foundation of Murbach, and in 1759 the abbots chose it for their residence. In 1789, at the outbreak of the French Revolution, the monastic buildings were laid in ruins, and, though the archives were rescued and removed to Colmar, the library perished. Geography Climate Guebwiller has a oceanic climate (Köppen climate classification ''Cfb''). The average annual temperature in Guebwiller is . The average annual rainfall is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Conductivity
Electrical resistivity (also called specific electrical resistance or volume resistivity) is a fundamental property of a material that measures how strongly it resists electric current. A low resistivity indicates a material that readily allows electric current. Resistivity is commonly represented by the Greek letter (rho). The SI unit of electrical resistivity is the ohm- meter (Ω⋅m). For example, if a solid cube of material has sheet contacts on two opposite faces, and the resistance between these contacts is , then the resistivity of the material is . Electrical conductivity or specific conductance is the reciprocal of electrical resistivity. It represents a material's ability to conduct electric current. It is commonly signified by the Greek letter (sigma), but (kappa) (especially in electrical engineering) and ( gamma) are sometimes used. The SI unit of electrical conductivity is siemens per metre (S/m). Resistivity and conductivity are int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Franc
The franc is any of various units of currency. One franc is typically divided into 100 centimes. The name is said to derive from the Latin inscription ''francorum rex'' (King of the Franks) used on early French coins and until the 18th century, or from the French ''franc'', meaning "frank" (and "free" in certain contexts, such as ''coup franc'', "free kick"). The countries that use francs today include Switzerland, Liechtenstein, and most of Francophone Africa. The Swiss franc is a major world currency today due to the prominence of Swiss financial institutions. Before the introduction of the euro in 1999, francs were also used in France, Belgium and Luxembourg, while Andorra and Monaco accepted the French franc as legal tender ( Monégasque franc). The franc was also used within the French Empire's colonies, including Algeria and Cambodia. The franc is sometimes Italianised or Hispanicised as the ''franco'', for instance in Luccan franco. Origins The franc was origina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Well Log
Well logging, also known as borehole logging is the practice of making a detailed record (a ''well log'') of the geologic formations penetrated by a borehole. The log may be based either on visual inspection of samples brought to the surface (''geological'' logs) or on physical measurements made by instruments lowered into the hole (''geophysical'' logs). Some types of geophysical well logs can be done during any phase of a well's history: drilling, completing, producing, or abandoning. Well logging is performed in boreholes drilled for the oil and gas, groundwater, mineral and geothermal exploration, as well as part of environmental and geotechnical studies. Wireline logging The oil and gas industry uses wireline logging to obtain a continuous record of a formation's rock properties. Wireline logging can be defined as being "The acquisition and analysis of geophysical data performed as a function of well bore depth, together with the provision of related services." Note ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bas-Rhin
Bas-Rhin (; Alsatian: ''Unterelsàss'', ' or '; traditional german: links=no, Niederrhein; en, Lower Rhine) is a department in Alsace which is a part of the Grand Est super-region of France. The name means 'Lower Rhine', referring to its lower altitude among the two French Rhine departments: it is downstream of the Haut-Rhin (Upper Rhine) department. Note that both belong to the European Upper Rhine region. It is, with the Haut-Rhin (Upper Rhine), one of the two departments of the traditional Alsace region which until 1871, also included the area now known as the Territoire de Belfort. The more populous and densely populated of the pair, it had 1,140,057 inhabitants in 2019.Populations légales 2019: 67 Bas-Rhin INSEE The [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merkwiller-Pechelbronn
Merkwiller-Pechelbronn () is a commune in the Bas-Rhin department in Grand Est in north-eastern France. It is notable as the original home of oil sands mining. Oil sands were mined from 1745 in Merkwiller-Pechelbronn, initially under the direction of Louis Pierre Ancillon de la Sablonnière, by special appointment of Louis XV. The Pechelbronn oil field was active until 1970, and was the birthplace of companies such as Antar and Schlumberger. The first modern oil sands refinery was built there in 1857; and it also had the first school of oil technology."History of Pechelbronn oil" See also *Communes of the Bas-Rhin departmen ...
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Pechelbronn
Merkwiller-Pechelbronn () is a commune in the Bas-Rhin department in Grand Est in north-eastern France. It is notable as the original home of oil sands mining. Oil sands were mined from 1745 in Merkwiller-Pechelbronn, initially under the direction of Louis Pierre Ancillon de la Sablonnière, by special appointment of Louis XV. The Pechelbronn oil field was active until 1970, and was the birthplace of companies such as Antar and Schlumberger. The first modern oil sands refinery was built there in 1857; and it also had the first school of oil technology."History of Pechelbronn oil" See also *Communes of the Bas-Rhin department< ...
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Electric Log
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 to eliminate the resistance of the contact leads. The log must run in holes containing electrically conductive mud or water, i.e., with enough ions present in the drilling fluid. Indeed, in the borehole fluids the electrical charge carriers are only ions (cations and anions) present in aqueous solution in the fluid. In the absence of dissolved ions, water is a very poor electrical conductor. Indeed, pure water is very poorly dissociated by its self-ionisation (at 25 °C, pKw = 14, so at pH = 7, += H–= 10−7 mol/L) and thus water itself does not significantly contribute to conduct electricity in an aqueous solution. The resisti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paris
Paris () is the capital and most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), making it the 30th most densely populated city in the world in 2020. Since the 17th century, Paris has been one of the world's major centres of finance, diplomacy, commerce, fashion, gastronomy, and science. For its leading role in the arts and sciences, as well as its very early system of street lighting, in the 19th century it became known as "the City of Light". Like London, prior to the Second World War, it was also sometimes called the capital of the world. The City of Paris is the centre of the Île-de-France region, or Paris Region, with an estimated population of 12,262,544 in 2019, or about 19% of the population of France, making the region France's primate city. The Paris Region had a GDP of €739 billion ($743 billion) in 2019, which is the highest in Europe. According to the Economis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resistivity
Electrical resistivity (also called specific electrical resistance or volume resistivity) is a fundamental property of a material that measures how strongly it resists electric current. A low resistivity indicates a material that readily allows electric current. Resistivity is commonly represented by the Greek letter (rho). The SI unit of electrical resistivity is the ohm- meter (Ω⋅m). For example, if a solid cube of material has sheet contacts on two opposite faces, and the resistance between these contacts is , then the resistivity of the material is . Electrical conductivity or specific conductance is the reciprocal of electrical resistivity. It represents a material's ability to conduct electric current. It is commonly signified by the Greek letter (sigma), but (kappa) (especially in electrical engineering) and ( gamma) are sometimes used. The SI unit of electrical conductivity is siemens per metre (S/m). Resistivity and conductivity are int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Société De Prospection Electrique
Schlumberger Limited (), doing business as SLB, is an oilfield services company. Schlumberger has four principal executive offices located in Paris, Houston, London, and The Hague. Schlumberger is the world's largest offshore drilling company. It is the biggest offshore drilling contractor (in terms of revenue) in the world. Schlumberger is incorporated in Willemstad, Curaçao as Schlumberger N.V. and trades on the New York Stock Exchange, Euronext Paris, the London Stock Exchange and SIX Swiss Exchange. Schlumberger is a Fortune Global 500 company, ranked 287 in 2016, and also listed in Forbes Global 2000, ranked 349 in 2022. History Schlumberger was founded in 1926 in Paris as the Electric Prospecting Company (french: Société de prospection électrique) by two brothers Conrad and Marcel Schlumberger from Alsace. Schlumberger supplies the petroleum industry with services such as seismic data processing, formation evaluation, well testing and directional drilling, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henri George Doll
Henri George Doll (13 August 1902 in Paris – 25 July 1991 in Montfort-l'Amaury, France) was a French-American scientist. Biography Doll was a leading figure in the development of oil well logging and a key technical leader of the Schlumberger oilfield services company. A graduate of the École Polytechnique and École des Mines, he married Anne Schlumberger, daughter of one of the Schlumberger brothers (Conrad), and joined their company. His contributions include the induction logging technique, and during World War II he led the development of the jeep-borne mine detector. He received a Certificate of Appreciation from the United States government, and was made an officer of the Légion d'honneur. Upon his retirement in 1967, the Schlumberger Well Surveying Corporation's research laboratory in Ridgefield, Connecticut was renamed the Schlumberger-Doll Research Center in his honor. The Schlumberger-Doll Research Center was relocated to Cambridge, Massachusetts in 200Sch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
