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Life-Cycle Impact Assessment of oil drilling mud system in Algerian arid area

Author

Listed:
  • Ghazi, Malika
  • Quaranta, Gaetana
  • Duplay, Joelle
  • Hadjamor, Raja
  • Khodja, Mohamed
  • Amar, Hamid Ait
  • Kessaissia, Zoubir

Abstract

The objective of this work is to assess the environmental impacts of the drilling mud system in Algeria's arid region. Water-based mud (WBM) and oil-based mud (OBM) are used during well drilling in Hassi Messaoud petroleum field, and have a considerable pollution potential particularly on the aquifer system which constitutes the single resource of drinking water in the Sahara. The Life-Cycle Assessment (LCA) approach is applied to evaluate the impacts of several drilling mud systems across all stages of their life cycle, e.g. use, treatment and disposal. Environmental impacts of five treatments scenarios corresponding to the drilling waste management applied in Hassi Messaoud are compared: reserve pit without treatment (burial option), secondary high centrifugation (vertical cuttings dryer), stabilisation/solidification online, stabilisation/solidification off line and thermal desorption. The impact assessment is carried on using the LCIA models of Impact 2002+ method in SIMAPRO7 software. This assessment identifies human toxicity and terrestrial eco-toxicity as the major impact categories in this specific arid context and quantifies the emissions contributions. The local environmental impact is the most important of the drilling mud life cycle and is mainly linked to emissions from reserve pits, treated cuttings, and drilling phase 16″ through the Turonian and Albian aquifer. The main contributing substances are aromatic hydrocarbons fraction and metals in particular barium, zinc, antimony, arsenic, and aluminium. Concerning the comparison of the treatment scenarios, it appears that stabilisation/solidification online is the best one; it has the lowest impact score in the two dominating categories because of the waste minimisation: mud storage avoided in the reserve pit. The second best scenario is the thermal desorption which obtains the lowest impact score in carcinogen effects due to hydrocarbons reduction (<1%) and avoided impacts of recovered oil. The toxic substances fate modeling will be improved by taking into account their site-specific impact.

Suggested Citation

  • Ghazi, Malika & Quaranta, Gaetana & Duplay, Joelle & Hadjamor, Raja & Khodja, Mohamed & Amar, Hamid Ait & Kessaissia, Zoubir, 2011. "Life-Cycle Impact Assessment of oil drilling mud system in Algerian arid area," Resources, Conservation & Recycling, Elsevier, vol. 55(12), pages 1222-1231.
    • Handle: RePEc:eee:recore:v:55:y:2011:i:12:p:1222-1231
    DOI: 10.1016/j.resconrec.2011.05.016
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    References listed on IDEAS

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    1. Benayada, B. & Habchi, K. N. & Khodja, M., 2003. "Stabilisation of clay walls during drilling in southern Algeria," Applied Energy, Elsevier, vol. 75(1-2), pages 51-59, May.
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