Construction and Application of Safety Risk Assessment Model for Inclined (Vertical) Well Construction Based on Process Method

Abstract

In order to scientifically evaluate the construction safety risk of inclined (vertical) wells, a systematic identification of project construction process risks was conducted based on the methodology employed. Subsequently, a safety management model for inclined (vertical) well construction was established by integrating actual project conditions. Using this model, the composition of the safety evaluation index system was analyzed. An inclined (vertical) well construction safety risk evaluation index system was constructed, encompassing five key dimensions: technical support, operational control, risk prevention and mitigation, management efficiency, and personnel quality. Leveraging C-OWA operator theory, sequence relationship analysis methods, and cloud model theory, a comprehensive construction safety risk assessment model for inclined (vertical) wells was developed. Finally, a pumped storage power station project was utilized as a case study. The results indicate that A (technical support) and D (risk prevention and control) represent the primary risk factors within the first-level indices. The indices were ranked in terms of risk severity as follows: risk prevention and control, technical measures, management efficiency, operational control, and personnel quality. The evaluation outcomes align closely with the actual construction scenarios. This model provides robust theoretical support for assessing construction risks in inclined (vertical) wells and holds practical significance in enhancing the level of construction risk management.