Post by PetrolScience .

Conrad Schlumberger and Marcel Schlumberger, (respectively, born October 2, 1878, Guebwiller, Alsace, Germany [now in France]—died May 9, 1936, Stockholm, Sweden; born June 21, 1884, Guebwiller—died August 19, 1953, Val-Richer, Normandy, France), French brothers, geophysicists and petroleum engineers noted for their invention, in 1927, of a method of continuous electric logging of boreholes. Their application of physics for use in geology brought major and universally adopted changes in mining and petroleum production. The company they founded in 1926, Schlumberger Ltd., is still one of the most important oil-field service companies in the world. Británica.com & SLB.com #petroleum #oilfields #onshore #energy #logging #schlumberger PetrolScience