Book Description

Current and proposed Canadian onshore oil and gas drilling and production activities are reviewed with respect to their potential for environmental effects. Canadian petroleum geology and related hydrogeology are described to provide a framework for discussion of the impact of oil and gas drilling and recovery operations, including tar sands development, and waste disposal practices. Environmental legislation applicable to oil and gas industry activities is also reviewed. Major environmental concerns identified include the potential for soil and groundwater contamination by drilling fluids, solid wastes, chemical additives, oils and brines, produced sands, and liquid wastes. The potential for contamination depends on handling and disposal practices and the geologic and hydrogeologic characteristics of the drilling and production site. Although fairly comprehensive legislation is in place, its effectiveness in the long-term has not been assessed, and no specific legislation exists for in situ tar sands development. Areas where knowledge is lacking and research is required have been identified.