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Developing an appropriate mathematical model for the environmental risk assessment of jack-up drilling rigs (case study: South Pars field, Iran)
Safy, M.; Moharamnejad, N.; Danehkar, A. & Jozi, S. A.
Abstract
Identifying the environmental hazards of jackup
drilling rig, which is used as an exploratory drilling and
offshore service platform, yet has been under intense discussion.
Risk assessment along with determining the likelihood
of an event occurrence and the severity of its
consequences can be a useful tool for identifying the priorities
and making satisfactory managerial decisions. In
this study, the environmental risks attributed to jack-ups in
the offshore area of Iran around the South Pars gas field
were studied, and finally a new mathematical model for the
environmental risk assessment in this area was presented.
Due to qualitative nature of some indefinite factors, fuzzy
logic was applied in this model. Moreover, the model design
was tailored to the ecological and environmental
conditions of South Pars gas field, and several sources of
risk were aggregated for the final environmental risk
assessment of jack-up drilling rig. The results indicated that
the total risk calculated for jack-up in transportation was
tolerable and limited management measures were required.
However, for the jack-up operation risks, the site was
found to be faced with ‘‘unacceptable risk’’ or requiring
extensive management measures.
Keywords
Jack-up drilling rig; Risk assessment; Fault tree analysis (FTA); Environmental risks; Offshore
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