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Application of Layers of Protection Analysis (LOPA) for subsea production systems - A risk based model for determination of integrity levels in a global perspective

Clarin, Christoffer LU (2013) In LUTVDG/TVBB VBR920 20131
Division of Fire Safety Engineering
Division of Risk Management and Societal Safety
Abstract (Swedish)
Depletion of onshore and shallow water reserves, in combination with new subsea technology, has made the petroleum industry advance into deeper water. However, new technology also brings new risks. Since most widely accepted standards and regulations are not directly aimed for subsea systems, new methods have to be developed. By developing a LOPA-model, which can be used specifically for subsea context, this thesis intends to be a part of filling that gap. The models main objective is to evaluate subsea production system risk and to determine the appropriate safety Integrity level (SIL) for all present independent protection layers. The method is semi-quantitative in nature, which means that the model output is based on a combination of... (More)
Depletion of onshore and shallow water reserves, in combination with new subsea technology, has made the petroleum industry advance into deeper water. However, new technology also brings new risks. Since most widely accepted standards and regulations are not directly aimed for subsea systems, new methods have to be developed. By developing a LOPA-model, which can be used specifically for subsea context, this thesis intends to be a part of filling that gap. The models main objective is to evaluate subsea production system risk and to determine the appropriate safety Integrity level (SIL) for all present independent protection layers. The method is semi-quantitative in nature, which means that the model output is based on a combination of generic statistical data, expert judgement and logical reasoning. According to the model validation, the result seems to be credible due to what is economically and technically feasible. For example, when a single satellite well subsea system was evaluated it ended up with SIL3 requirements for the “isolation of well function” and lower SIL requirements for other less critical safety functions. (Less)
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author
Clarin, Christoffer LU
supervisor
organization
course
VBR920 20131
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Failure frequency, failure mechanisms, hydrocarbons, leakage, LOPA, LOPA-credit, offshore, oil, protection layers, SIL, SIS, subsea, subsea system, felfrekvens, felmekanismer, hydrokarboner, läckage, olja, skyddsbarriärer
publication/series
LUTVDG/TVBB
report number
5428
ISSN
1402-3504
language
English
id
4195391
date added to LUP
2013-12-13 14:08:20
date last changed
2014-03-10 10:40:46
@misc{4195391,
  abstract     = {Depletion of onshore and shallow water reserves, in combination with new subsea technology, has made the petroleum industry advance into deeper water. However, new technology also brings new risks. Since most widely accepted standards and regulations are not directly aimed for subsea systems, new methods have to be developed. By developing a LOPA-model, which can be used specifically for subsea context, this thesis intends to be a part of filling that gap. The models main objective is to evaluate subsea production system risk and to determine the appropriate safety Integrity level (SIL) for all present independent protection layers. The method is semi-quantitative in nature, which means that the model output is based on a combination of generic statistical data, expert judgement and logical reasoning. According to the model validation, the result seems to be credible due to what is economically and technically feasible. For example, when a single satellite well subsea system was evaluated it ended up with SIL3 requirements for the “isolation of well function” and lower SIL requirements for other less critical safety functions.},
  author       = {Clarin, Christoffer},
  issn         = {1402-3504},
  keyword      = {Failure frequency,failure mechanisms,hydrocarbons,leakage,LOPA,LOPA-credit,offshore,oil,protection layers,SIL,SIS,subsea,subsea system,felfrekvens,felmekanismer,hydrokarboner,läckage,olja,skyddsbarriärer},
  language     = {eng},
  note         = {Student Paper},
  series       = {LUTVDG/TVBB},
  title        = {Application of Layers of Protection Analysis (LOPA) for subsea production systems - A risk based model for determination of integrity levels in a global perspective},
  year         = {2013},
}