Blowout is one of the most serious accidents in the drilling operation as it can lead to catastrophic consequences. The findings of blowout investigations indicate a chain of failures in Well Barriers (WBs) leading to a blowout. There is an urgent need to address the measuring of the performance of WBs and improve their safety to prevent blowouts. This study proposes a quantitative barrier risk-based evaluation model for drilling blowout using a set of WB performance indicators. The methodology of the proposed model is outlined in two sections. In the first section, policymaking, operational, personal, and mechanical factors are identified and described as WB performance indicators using a bow-tie approach. In the second section, the process safety performance indexing system in the chemical industries is developed for the management of maintaining integrity in WB indicators. In this section, a set of leading indicators are identified and proposed for the evaluation of WB performance. Finally, the safety benchmark of WB performance indicators is calculated comprehensively using a weighted aggregation approach based on the DEMATEL-based ANP (DANP) method. A blowout accident is used as a case study to show how this model can evaluate the level of drilling safety. The result of this study shows:(i) how DANP can be applied to determine the relative weight of WB performance indicators for the proposed model based on analyzing the interdependency among their indicators; (ii) how DANP is able to assist decision makers in selecting an influential strategy for the risk mitigation of a blowout; (iii) how the proposed approach can quantitatively model the performance of WBs from the well planning process to the drilling operation using leading indicators and (iv) how policymaking, as one of the main risk controlling factors described in this model, can be applied in improving the performance of process safety.

井喷是钻井作业中最严重的事故之一，因为它可能导致灾难性后果。井喷调查的结果表明，井障 (WB) 中的一系列故障导致了井喷。迫切需要解决WBs性能的测量问题并提高其安全性以防止井喷。本研究使用一组 WB 性能指标提出了一种基于障碍风险的定量评估模型，用于钻井井喷。所提出模型的方法在两个部分中进行了概述。在第一部分，政策制定、运营、个人和机械因素被确定并描述为使用领结方法的世界银行绩效指标。在第二部分，化工行业的过程安全绩效指标系统是为保持 WB 指标完整性的管理而开发的。在本节中，确定并提出了一套用于评估世行绩效的领先指标。最后，在基于DEMATEL的ANP（DANP）方法的基础上，使用加权聚合方法综合计算WB性能指标的安全基准。以井喷事故为例，说明该模型如何评估钻井安全水平。本研究的结果表明：(i) 基于分析指标之间的相互依存关系，如何应用 DANP 来确定所提出模型的 WB 绩效指标的相对权重；(ii) DANP 如何帮助决策者选择有影响力的降低井喷风险的策略；(iii) 所提出的方法如何使用领先指标对从井规划过程到钻井作业的 WBs 的性能进行定量建模，以及 (iv) 作为该模型中描述的主要风险控制因素之一的决策如何应用于提高过程安全性能。