Mechanistic studies and modelling of corrosion,structural degradation,and associated soil subsidence during long-term decommissioning of oil pipelines

石油管道长期退役过程中腐蚀、结构退化和相关土壤沉降的机理研究和建模

• 批准号: 516130-2017
• 负责人: ElBadry, Mamdouh
• 金额: $ 14.43万
• 依托单位: University of Calgary
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=694166
• 关键词: Mechanistic; studies; modelling; corrosion; structural

Many of oil and gas pipelines have been in service for over 50 years or longer, and are now coming to the end of their lifespan for which they were designed. As this infrastructure continues to age, a growing number of pipelines will permanently be taken out of service and potentially left in place. Decommissioned pipelines are subject to long-term degradation due to internal and external corrosion. Excessive degradation due to corrosion reduces the load bearing capacity of the pipeline, and may lead to loss of structural integrity and to subsequent collapse over time, possibly leading to ground subsidence. To date, there is limited understanding of the degradation processes and their consequences on decommissioned pipelines.The overall objective of the proposed research is to develop a strong scientific knowledge base to advance our understanding of corrosion, structural integrity, and soil subsidence associated with pipeline decommissioning, and further, to quantitatively predict by mechanistic modelling the potential effects and risks after long-term decommissioning of the pipelines in soils. The research outcomes include new knowledge and new models, all of which will enable pipeline operators and stakeholders such as regulators and landowners to understand, predict and manage the short-term and long-term processes and consequences of pipeline decommissioning.The benefits from this research will be multi-fold and tremendous. A full understanding of the mechanisms and consequences of decommissioned pipelines is presently not available. The research will fill this gap, and the outcome will be original and innovative, contributing to a strong scientific knowledge base in pipeline decommissioning. At the same time, the research will benefit the pipeline industry and the Canadian public by enabling reliable prediction and improved management, and thus safe decommissioning of aged pipeline infrastructure.

许多石油和天然气管道已经使用了 50 多年或更长时间，现在即将达到其设计寿命。随着基础设施的不断老化，越来越多的管道将永久停止服务并可能留在原地。退役管道会因内部和外部腐蚀而遭受长期退化。腐蚀导致的过度退化会降低管道的承载能力，并可能导致结构完整性丧失，并随着时间的推移导致随后倒塌，可能导致地面沉降。迄今为止，对退化过程及其对退役管道的影响的了解还很有限。拟议研究的总体目标是建立强大的科学知识库，以增进我们对与管道退役相关的腐蚀、结构完整性和土壤沉降的理解，并进一步通过机械建模定量预测土壤中管道长期退役后的潜在影响和风险。研究成果包括新知识和新模型，所有这些都将使管道运营商和监管机构、土地所有者等利益相关者能够理解、预测和管理管道退役的短期和长期过程和后果。这项研究的好处将是多方面的、巨大的。目前尚无法全面了解退役管道的机制和后果。该研究将填补这一空白，其成果将具有原创性和创新性，有助于在管道退役方面建立强大的科学知识基础。与此同时，该研究将通过可靠的预测和改进的管理，从而使老化的管道基础设施安全退役，从而使管道行业和加拿大公众受益。