Schlumberger Oilfield Services has acquired Kavernen Bau und Betriebs GmbH (KBB) from the Preussag Group. The purchase of the Hanover, Germany-based consulting firm, which has more than 30 years of experience in subsurface gas storage, augments the range of services provided by Schlumberger for the growing worldwide gas business. KBB's primary expertise is in the engineering, construction and project management of facilities for the underground storage of natural gas in salt domes, aquifer structures and depleted oil and gas reservoirs, including the associated salt leaching, gas compression and gas treatment facilities on the surface.