World’s largest oilfield services provider, Schlumberger has been reportedly seeking a number of deviations from the original bidding norms of the ONGC tender for the Geleki field. Sources familiar with the matter revealed that the US-based firm is projecting a decline of 26-27% in base production in upcoming years. Schlumberger is seeking several deviations in tender norms for instilling technology to hike output over the reduced base production.