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

表征和分析温度和压力对油井水泥寿命井完整性影响的多尺度方法

• 批准号: 485320-2015
• 负责人: Sorelli, Luca
• 金额: $ 0.38万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=665628
• 关键词: multi; scale; approach; characterize; analyze

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: **(1) To characterize the effect of temperature and pressure on the behaviour of well cements; **(2) To better understand the effect of temperatures and pressures on the durability of well cements employed in Canada;**(3) To develop an engineering model for assessing the long term durability of well cement sheaths; **(4) To set-up a new test methodology for automatically characterizing mechanical and chemical properties of the microstructure of a cement paste. **By improving the current knowledge on oil well cements, the project will: (i) advance the current practise for well cement sheaths; (ii) reduce the risk of water contamination; (iii) improve the preservation of the Canadian environment and resources.******

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。通过召集国际专家，拟议的研究项目将采用一种基于多尺度技术的创新和综合方法，以实现以下目标：**（1）确定温度和压力对油井水泥性能的影响; **（2）更好地了解温度和压力对加拿大使用的油井水泥耐久性的影响;**（3）开发用于评估油井水泥环长期耐久性的工程模型; **（4）建立用于自动表征水泥浆微观结构的机械和化学性质的新的测试方法。** 通过提高目前对油井水泥的认识，该项目将：（一）促进目前油井水泥护套的做法;（二）减少水污染的风险;（三）改善加拿大环境和资源的保护。