Plug & abandon strategies for Canada's oil & gas wells

插头

• 批准号: 516022-2017
• 负责人: Frigaard, Ian
• 金额: $ 19.7万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=696941
• 关键词: Plug; abandon; strategies; Canada; oil

With the increasing public scrutiny of the oil and gas industry in the past 10-20 years, the attention of the industry, regulatory authorities and all levels of government is driven towards tackling serious questions of environmental stewardship that afflict the industry. High amongst the list is the question of safe long-term abandonment of oil and gas wells. By 2013, more than 550,000 oil & gas well had been drilled in Canada, most of which were in the Western Canada Sedimentary Basin. In Alberta alone, 35% of total wells are abandoned: this number adds up to around 151,000 abandoned wellbores in the province. Much of the current well stock is 30-40 years old or more. Canada is entering an era of P&A (Plug and Abandonment) in which 1000's of wells will be abandoned annually for the foreseeable future. Environmental & public safety concerns abound. Long term sealing of wellbores requires proper placement of sealing materials (cement), avoidance of contamination/mixing and ensuring a good bond of the cement to the surrounding rock. This 4-year project is about the engineering design of P&A operations. The project has 2 key objectives. First we will assess the status of typical Canadian P&A operations, well architectures and regulatory practices, within a more global context. We will conduct a detailed review of the scientific and engineering literature as it pertains to longevity/sealing, clarify knowledge gaps and expose technological issues. Second, through a network of collaborative Canadian researchers and targeted complementary sub-projects we will provide physical and engineering rationale for regulatory and operational decisions that concern fluid mechanical issues (placement, cleaning, mixing, and thus potential bonding). Our team will conduct 7 complementary and interlinked studies addressing P&A knowledge gaps while providing fundamental advances, using a combination of experimental, analytical and computational methodologies, combined with field survey work with industrial partners.

在过去的10-20年里，随着公众对石油和天然气行业的监督越来越多， 行业、监管机构和各级政府都在努力解决以下严重问题： 环境管理，这困扰着该行业。其中最重要的问题是安全的长期 油气威尔斯井废弃。截至2013年，加拿大已钻探超过55万口油气井，其中大多数是 其中加拿大西部沉积盆地。仅在阿尔伯塔，就有35%的威尔斯井被废弃： 这一数字加起来在该省约有151 000个废弃井眼。目前的大部分油井库存是 30-40岁或以上。加拿大正在进入P&A（堵塞和废弃）时代，其中1000口威尔斯井 在可预见的未来每年都会被遗弃环境和公共安全问题比比皆是。 井眼的长期密封要求密封材料（水泥）的适当放置， 污染/混合并确保水泥与周围岩石的良好粘合。这个为期四年的项目是 P&A操作的工程设计。该项目有两个主要目标。首先，我们将评估 典型的加拿大P&A业务、油井结构和监管实践的现状， 上下文我们将对科学和工程文献进行详细的审查，因为它涉及到 寿命/密封，澄清知识差距并揭示技术问题。第二，通过网络 合作加拿大研究人员和有针对性的补充子项目，我们将提供物理和 涉及流体机械问题的管理和操作决策的工程原理（布置， 清洁、混合以及由此的潜在结合）。我们的团队将进行7项互补和相互关联的研究 解决P&A知识差距，同时提供根本性的进步，使用实验， 分析和计算方法，结合与工业合作伙伴的实地调查工作。