Definition(s)
Oil based mud (OBM)
Oil based mud (OBM) means a drilling fluid in which the continuous phase is a product obtained from petroleum distillation (e.g., diesel oil or mineral oil).
Source: Offshore Waste Treatment Guidelines, The Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada-Nova Scotia Offshore Petroleum Board, and National Energy Board, Canada, December 15, 2010. Regulatory Guidance