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服役超过50年或更长时间，现在即将达到其设计寿命的终点。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。由于内部和外部的腐蚀，退役的管道会长期退化。由于腐蚀导致的过度退化降低了管道的承载能力，并可能导致结构完整性的丧失，并随着时间的推移导致随后的坍塌，可能导致地面沉降。迄今为止，人们对降解过程及其对退役管道的影响了解有限。该研究的总体目标是建立一个强大的科学知识基础，以促进我们对管道退役相关的腐蚀、结构完整性和土壤沉降的理解，并进一步通过机制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利益相关者（如监管机构和土地所有者）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和巨大的。目前还没有对管道退役的机制和后果的充分了解。这项研究将填补这一空白，其结果将是原创和创新的，为管道退役提供了强大的科学知识基础。同时，该研究将使管道行业和加拿大公众受益，实现可靠的预测和改进的管理，从而安全退役老化的管道基础设施。