Abstract
Drilling for the exploration and extraction of oil requires the use of drilling fluids which are continuously pumped down and returned carrying the rock phase that is extracted from the well. The potential environmental impacts of contaminated fluids from drilling operations have attracted increasing community awareness and scrutiny. This review article highlights current advances in the treatment of drill cuttings and compares the technologies in terms of cost, time and space requirements. Traditionally, a range of non-biological methods have been employed for the disposal of drill cuttings including burial pits, landfills and re-injection, chemical stabilization and solidification and thermal treatments such as incineration and thermal desorption. More recently, bioremediation has been successfully applied as a treatment process for cuttings. This review provides a current comparison of bioremediation technologies and non-biological technologies for the treatment of contaminated drill cuttings providing information on a number of factors that need to be taken into account when choosing the best technology for drilling waste management including the environmental risks associated with disposal of drilling wastes.
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