Don't know the early history, but do know later. Baker Hughes bought Western Atlas (which is what Western Geophysical was part of - not sure when Atlas came into the picture) around 1999-2000 when there was a wave of consolidation in the oilfield servicing industry. Split Western Atlas into two parts - Baker Atlas moved up to Rankin Road by IAH, next door to Baker Inteq division. Western Geophysical was soon combined with the Geco Prakla (sp?) division of Schlumberger to form a joint venture - Western Geco and they moved to Briarpark and Richmond (still there I think. Then Baker Hughes sold the land at Beltway 8 & Westheimer around 2001-2002. Later (2005-2006?) they sold their interest in Western Geco JV to Schlumberger and I believe it is still a division of them.