WesternGeco, a business unit of Schlumberger, is the world’s leading geophysical services company, providing comprehensive worldwide reservoir imaging, monitoring, and development services, with the most extensive geophysical survey crews and data processing centers in the industry, as well as the world’s largest multiclient data library. Services range from 3D and 4D (time-lapse) seismic surveys to multicomponent and electromagnetic surveys, supplying clients with accurate measurements of subsurface geology