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A review on impacts of drilling mud disposal on environment and underground water resources in south of Iran

Bakhshian, S ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: doi.org/10.2118/125690-MS
  3. Abstract:
  4. In drilling oil wells a system of complex fluids and chemical additives is used. Losses of these fluids in the well during drilling or disposal of them in well site could transfer pollutants to groundwater. In the present study a number of well sites, located in South of Iran, were studied to indicate types and magnitude of various pollutant materials that remain in the environment undestroyed and have considerable impacts on the underground water resources. Hydrocarbons used in Oil Base Muds (OBM) that can't be biodegrade readily in nature found to be the most severe pollutant material caused by disposal of Drilling Mud and Cuttings. Volume of drilling waste for these oil wells evaluated to be an average almost 0.5 m3 per one meter of drilled oil well. Available common treatment methods were compared to assess the most economically and environmentally attractive treatment scenarios. Thermal desorption and reserve pit without treatment are two most dominant methods could be conducted in Southern Oil Fields of Iran, each has its advantages and disadvantages. Due to geological structure and near surface aquifer in Khuzestan province thermal desorption should be conducted to disposal cuttings to reduce their hydrocarbon content to less than 5% according to European Standard. Major challenges of drilling waste management program in onshore oil fields of Iran were studied and clear principals for managing waste streams, which include: reduce, replace, reuse, recycle, recover, treat and final dispose, were listed along with material, equipment and strategies that should be considered in each step. Copyright 2009, SPE/IADC Middle East Drilling Technology Conference & Exhibition
  5. Keywords:
  6. Water resources ; Chemical additive ; Complex fluids ; Drill cutting ; Drilling mud ; Drilling waste management ; Drilling wastes ; Drilling-mud disposal ; European standards ; Geological structures ; Hydrocarbon content ; Khuzestan ; Near-surface ; Oil base muds ; Onshore oil fields ; Pollutant materials ; Treatment methods ; Underground water resources ; Waste stream ; Aquifers ; Boring ; Computer software reusability ; Cutting ; Cutting fluids ; Drilling fluids ; Groundwater pollution ; Groundwater resources ; Hydrocarbons ; Oil well drilling equipment ; Oil wells ; Petroleum reservoir evaluation ; Rock drills ; Surface chemistry ; Surface structure ; Thermal desorption ; Waste management ; Water recycling ; Oil well drilling
  7. Source: Proceedings of the SPE/IADC Middle East Drilling Technology Conference and Exhibition, 26 October 2009 through 28 October 2009 ; 2009 , Pages 447-454 ; 9781615677450 (ISBN)
  8. URL: https://www.onepetro.org/conference-paper/SPE-125690-MS