Schlumberger brothers
| Conrad Schlumberger | |
|---|---|
| Born | 2 October 1878 Gebweiler, Alsace-Lorraine | 
| Died | 9 May 1936 (aged 57) Stockholm | 
| Education | École Polytechnique | 
| Known for | Creation of the Société de Prospection Electrique | 
| Mother | Marguerite De Witt | 
| Relatives | Marcel Schlumberger, brother | 
| Scientific career | |
| Fields | Geophysics | 
| Institutions | École des Mines de Paris | 
| Emile Henry Marcel Schlumberger | |
|---|---|
| Born | 21 June 1884 Gebweiler, Alsace-Lorraine | 
| Died | 9 May 1953 (aged 68) Val-Richer, Saint-Ouen-le-Pin, Calvados, France | 
| Education | École Centrale Paris | 
| Known for | Creation of the Société de Prospection Electrique | 
| Mother | Marguerite De Witt | 
| Relatives | Pierre Schlumberger, son; Conrad Schlumberger, brother; Léa Seydoux, actress, great-great-granddaughter | 
| Scientific career | |
| Fields | Geophysics | 
| Institutions | École des Mines de Paris | 
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.