A multi-scale approach to characterize and analyze the effect of temperature and pressure on the life well integrity of oil well cements

石油和天然气生产在北美能源资源中起着重要作用，如过去10年来碳氢化合物钻井数量的显著增加所示。由于以下3个原因，井水泥是井的关键方面：（1）在井筒内的各种含水、含气和含油地层之间提供水力隔离;（2）为套管提供足够的支撑（例如，防止开裂、屈曲等）; (3)提供外部套管防腐保护。油井水泥可能具有复杂的混合设计，以承受温度和压力方面的恶劣条件。油井水泥在高温高压下的物理和化学性能发生显著变化。此外，温度和压力影响机械性能（例如，粘度和韧性），其控制开裂的风险。不幸的是，公开文献中关于温度和压力对油井水泥性能影响的数据非常有限。通过汇集国际专家，拟议的研究项目将采用基于多尺度技术的创新和综合方法，以实现以下目标：

The oil and gas production plays a major role in the North American energy resources as shown by the number of hydrocarbon boreholes which has been increasing impressively in the last 10 years. Well cements is a critical aspect of a well for 3 reasons: (1) provide hydraulic isolation between various water, gas, and oil bearing formations within the wellbore; (2) provide adequate support for the casing (e.g., cracking, buckling prevention, etc.); (3) provide external casing corrosion protection. Well cements can have complex mix designs to withstand severe conditions in term of temperature and pressure. The physical and chemical behaviour of well cements changes significantly at high temperature and pressure. Furthermore, temperature and pressure affect the mechanical properties (e.g., viscosity and toughness) which govern the risk of cracking. Unfortunately, the data available in open literature on the effect of temperature and pressure on the behaviour of oil well cements is quite limited. By bringing together international experts, the proposed research project will employ an innovative and comprehensive approach based on multi-scale techniques to achieve the following objectives: