Application of STPA-BWM model to evaluate the safety of Azar oil field gas transmission pipelines based on reliability

Subject Areas : Health, safety and environment

Bahareh Lelahizadeh ¹ , Hasan Mihanparast ² , Simin dokht Zeynali ³ , Farham Aminsharei ⁴ , majid afshar ⁵

1 - Department of Safety, Health and Environment , Science and Research Branch , Islamic Azad University, Tehran , Iran
2 - Department of Safety, Health and Environment , Science and Research Branch , Islamic Azad University, Tehran , Iran
3 - Department of Safety, Health and Environment , Science and Research Branch , Islamic Azad University, Tehran , Iran
4 - Department of Chemical Engineering, Health, Safety & Environment, Najafabad Branch, Islamic Azad University, Najafabad, Iran
5 - Department of Safety, Health and Environment , Science and Research Branch , Islamic Azad University, Tehran , Iran

Received: 2024-11-12 Accepted : 2024-12-19 Published : 2024-12-19

Keywords: Evaluation - pipeline - reliability - risk - Azar oil field - STPA - BWM,

Abstract :

Introduction: The importance of oil and gas in the world since their discovery until now both in terms of energy production and in terms of providing the raw materials needed for the production of industrial goods, is not hidden from anyone. Due to the spread of lines in various institutional or even residential areas as well as the high potential of vulnerability the safety of pipelines is of particular importance.

Materials and Methods: In this research (a case study of the oil industry startup and operation company - Azar oil field project located in Ilam province) the factors related to fire and explosion in these lines have been investigated based on the analysis of the BWM-STPA integrated system theory process.

Results and Discussion: After completing the questionnaire, weight was given to the criteria (safety, technical inspection, non-operating protection, design, construction, and maintenance) and it was found that question 16 of the questionnaire related to the technical inspection criteria has the highest weight, the average of which is 4.52 and Question 9 of the questionnaire related to non-agent defense has the lowest weight, the average of which is 3.05. The best criterion is technical inspection and the worst criterion is non-functional defense. The BWM-STPA method effectively ranks the identified risks and indicates that the technical inspection factor is the most severe risk in the gas pipeline. This is followed by a leak in the gas pipeline an explosion and a fire. Risk quantification using the BWM method is helpful in carrying out control measures for unsafe measures U3-U11-U15-U16-U17-U20, because they have a higher weight than the others.

Conclusion: As a result 7 control actions (CA) and 20 unsafe control actions (UCA) and 4 identification scenarios have been defined. Quantitative and qualitative risk assessment of Azar oil field gas pipeline provides a basis for increasing its safety and reliability. In the obtained results, it is suggested to provide continuous training for employees in the field of safety and compliance with instructions. Inspection and control systems are reviewed regularly. Focus on improving the quality of materials and equipment used in gas transmission lines

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