Marcel Schlumberger

German geophysicist

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July 23, 2026

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Marcel Schlumberger was a French geophysicist, not German. He and his brother, Conrad, revolutionized the petroleum industry with their invention of continuous electric logging of boreholes in 1927. This application of physics to geology significantly changed mining and petroleum production.1

The brothers founded Schlumberger Limited (SLB) in 1926, which remains a major oil-field service company today. Their work involved using electric currents to measure variations in the ground's resistivity, helping to detect mineral deposits and map underground oil reservoirs. This method offered a more cost-effective and reliable alternative to traditional logging techniques.12

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Conrad Schlumberger and Marcel Schlumberger
Marcel studied engineering at the École Centrale in Paris, graduating in 1907, and in 1909 he went to work for foreign mining interests owned by his wife’s family; he too served in the army during the war.
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Marcel studied engineering at the École Centrale in Paris, graduating in 1907, and in 1909 he went to work for foreign mining interests owned by his wife’s family; he too served in the army during the war.
Read More