The Orcher suffix comes from the name of the first seigneurs of the village, now corrupted to Orcher, but originally Aurichier (alor = alder and kjarr / ker = marsh. Cf. Ellerker, Yorkshire), that took themselves in turn their name from the same place, where the chateau is located.
Mercier extended the vertical integration of the company by constructing petroleum transport infrastructure and refineries at Gonfreville, near Le Havre and on the Étang de Berre, near Martigues.