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首页> 外文会议>Proceedings of the ASME India oil and gas pipeline conference 2017 >Offshore Oil and Gas Pipeline - Flow Assurance and Corrosion Modelling for Inspection Prioritization
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Offshore Oil and Gas Pipeline - Flow Assurance and Corrosion Modelling for Inspection Prioritization

机译：海上石油和天然气管道-用于检查优先级的流量保证和腐蚀建模

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Flow modelling and corrosion risk assessment are used to study a challenging multiphase pipeline, where the main focus is the identification and prioritization of critical locations for direct inspection (DA). Through the internal corrosion direct assessment (ICDA), flow modelling sensitivity studies is carried out to identify critical locations with risks of high shear stresses and water holdup. Through corrosion risk assessment (CRA), the critical locations were narrowed down to four primary locations, which through direct inspection could provide the information necessary to estimate the overall pipeline condition. It is highlighted that without the In-line inspection (ILI) data, selection of inspection locations becomes problematic. However, carrying out a CRA in combination with dynamic flow modelling can build a more representative analysis and assist with effective engineering decision making. One of the available industry standard tools that can assist with demonstration of pipelines' integrity requirement is an approach that integrates flow assurance with corrosion modelling known as Internal Corrosion Direct Assessment (ICDA). More specifically, an industry standard multiphase dynamic flow model (OLGA) with well-established corrosion models, CRA and engineering judgement have been employed to identify and prioritize inspection locations. A benefit of this work is the validation of predictions by both OLGA and the corrosion engineer in close adoption to the procedures of the NACE ICDA standard practice. Considerations from corrosion engineering aspect on modelling requirements and corrosion diagnosis will be presented, where the primary focus is on identification of hot spots and consequent inspection requirements in order to limit excavation activities and provide cost-effective solutions to the client.
机译：流动建模和腐蚀风险评估用于研究具有挑战性的多相管道，其主要重点是对直接检查（DA）的关键位置进行识别和确定优先级。通过内部腐蚀直接评估（ICDA），进行了流动建模敏感性研究，以识别具有高剪切应力和水滞留风险的关键位置。通过腐蚀风险评估（CRA），关键位置缩小到四个主要位置，通过直接检查，这些位置可以提供估计总体管道状况所需的信息。需要强调的是，如果没有在线检查（ILI）数据，检查位置的选择将成为问题。但是，将CRA与动态流建模相结合可以建立更具代表性的分析，并有助于有效的工程决策。可以用来证明管道完整性要求的可用的行业标准工具之一是一种将流量保证与腐蚀建模相集成的方法，称为内部腐蚀直接评估（ICDA）。更具体地说，已采用具有完善的腐蚀模型，CRA和工程判断的行业标准多相动态流模型（OLGA）来确定检查位置并确定其优先级。这项工作的好处是，OLGA和腐蚀工程师均会严格采用NACE ICDA标准规范的程序来验证预测。将介绍腐蚀工程方面对建模要求和腐蚀诊断的考虑，其中主要重点是确定热点和随之而来的检查要求，以限制挖掘活动并为客户提供具有成本效益的解决方案。

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