Towards Net-Zero Emissions: mechanics, processes and materials to support risk-based well decommissioning

迈向净零排放：支持基于风险的油井退役的机械、工艺和材料

• 批准号: 577111-2022
• 负责人: Frigaard, IanIA
• 金额: $ 21.86万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=759951
• 关键词: Towards; Net; Zero; Emissions; mechanics

The Canadian Net-Zero Emissions Accountability Act became law on June 29th, 2021. A large part of the emissions focus has targeted industrial emissions, particularly from the hydrocarbon energy industry. Here we focus at oil and gas well emissions and those well operations that are performed to reduce or eliminate leakage. Permanent decommissioning of 1000's of wells occurs annually in Western Canada. Long term sealing of wellbores requires proper placement of sealing materials, avoidance of contamination/mixing and ensuring a good hydraulic bond of the cement to both steel and surrounding rock. Each of these are physically complex and difficult to predict and/or measure as they occur below surface. Industry best practices and regulatory requirements need to be based on scientific knowledge of the complex defining mechanics, the flow processes and materials performance, as well as on field-based data, measurement and monitoring. This project delivers the underlying knowledge as its objectives. The present project builds on a long-term collaboration among three Canadian universities and industrial partners (Phase I). Phase II builds on the success of Phase I and is aligned with knowledge gaps and policy issues identified by a consensus between industrial and regulatory players. The project uses infrastructure established in Phase I and addresses sub-projects in five complementary areas: (i) dump bailing & off-bottom plug placement, (ii) cleaning behind casing & squeeze cementing, (iii) well leakage, (iv) mechanics &materials, and (v) societal impacts and abandonment alternatives. Our team will conduct these interlinked studies, addressing well abandonment knowledge gaps while providing fundamental advances using combined experimental, analytical and computational methods, along with field survey work, data modelling. The overall aim is to develop understanding and tools that allow quantitative assessment of different practices. This allow the development of risk-based regulations and practices by industry and regulators.

加拿大净零排放问责法案于 2021 年 6 月 29 日成为法律。排放重点很大一部分针对工业排放，特别是来自碳氢化合物能源行业的排放。在这里，我们重点关注石油和天然气井的排放以及为减少或消除泄漏而进行的井作业。加拿大西部每年都会有数千口井永久退役。井筒的长期密封需要正确放置密封材料，避免污染/混合，并确保水泥与钢材和周围岩石的良好水力结合。其中每一个在物理上都很复杂并且难以预测和/或测量，因为它们发生在地表以下。行业最佳实践和监管要求需要基于复杂的定义机制、流程和材料性能的科学知识，以及基于现场的数据、测量和监控。该项目以提供基础知识为目标。目前的项目建立在三所加拿大大学和工业合作伙伴之间的长期合作（第一阶段）的基础上。第二阶段建立在第一阶段成功的基础上，并与行业和监管机构之间达成共识所确定的知识差距和政策问题保持一致。该项目使用第一阶段建立的基础设施，并解决五个互补领域的子项目：(i) 倾倒捞出和离底塞放置，(ii) 套管后面的清洁和挤压固井，(iii) 井漏，(iv) 机械和材料，以及 (v) 社会影响和废弃替代方案。我们的团队将进行这些相互关联的研究，解决油井废弃知识差距，同时利用组合的实验、分析和计算方法以及现场调查工作和数据建模来提供基础性进展。总体目标是发展对不同实践进行定量评估的理解和工具。这使得行业和监管机构能够制定基于风险的法规和实践。