Correlating variationsin chemical and nanoscale components of oil-field cements to hydration, water transport, and macroscopic flow characteristics

将油田水泥的化学和纳米级成分的变化与水化、水传输和宏观流动特性相关联

• 批准号: 2278817
• 金额: --
• 依托单位: University of Surrey
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2278817
• 关键词: Correlating; variationsin; chemical; nanoscale; components

Cementing is a critical stage in any petroleum well construction project. Once a well has been drilled, a cement slurry is pumped around the annulus of the steel liner to provide an impermeable barrier between the well bore and the rock formation. The cement seal is necessary to ensure well stability and prevent contamination of subsurface water aquifers with hydrocarbons. Catastrophic failures in well integrity (such as occurred recently in the Gulf of Mexico) have been attributed to poor cement performance or incomplete removal of drilling fluid during placement. The significant time required to pump cement around a well is an additional complication, as the cement chemistry and nanostructure is constantly evolving. The macroscopic properties of the cement (rheology as a slurry; thickening time; permeability and compressive strength when hydrated) are controlled by the chemical formulation and particulate additives. However, there is presently incomplete understanding of the detailed relationship between the tuneable formulation parameters and the in-service performance. The aim of this project is to understand relationships governing the hierarchy of relevant length and time-scales using a multifaceted experimental approach.Schlumberger is an oilfield services company with a global footprint. Activities at the Cambridge centre focus on the development of new science and technology for well construction, with an emphasis on well construction processes and automation. The facilities available for this proposed project include a suite of low field magnetic resonance instruments, Fourier transform Infra-red (FTIR) and X-ray fluorescence (XRF) spectrometers, conventional rheometers, and hydrodynamic flow systems. The project will be supervised by Dr Débora Campos de Faria (chemistry) and Dr Jonathan Mitchell (magnetic resonance). Support for aspects of the project related to high temperature / high pressure characterisation, fluid flow, and modelling / simulation will be provided by other scientists and engineers at Schlumberger Cambridge Research.

在任何石油井建筑项目中，胶结是一个关键阶段。一旦钻了一口井，就会在钢衬里的环上泵送水泥浆，以在井孔和岩层之间提供不可渗透的屏障。水泥密封需要确保稳定性并防止地下水含水层用碳氢化合物污染。井完整性的灾难性失败（例如最近发生在墨西哥湾）是由于水泥性能差或放置过程中钻孔液的不完全去除。在水泥化学和纳米结构不断发展时，泵送水泥周围水泥所需的大量时间是另一种并发症。水泥的宏观特性（流变学作为浆液；增厚时间；水合时的渗透性和抗压强度）由化学配方和特定的添加剂控制。但是，人们对可调公式参数与服务中绩效之间的详细关系存在不完整的理解。该项目的目的是了解使用多方面的实验方法管理相关长度和时间表的层次结构的关系。Schlumberger是一家具有全球足迹的油田服务公司。剑桥中心的活动集中于开发新的科学技术，以进行井建造，重点是井建造过程和自动化。该提议的项目可用的设施包括一套低场磁共振仪器，傅立叶变换红外（FTIR）和X射线荧光（XRF）光谱仪，常规的流变仪和流体动力流量系统。该项目将由DéboraCampos de Faria博士（化学）和Jonathan Mitchell博士（磁共振）进行监督。 Schlumberger Cambridge Research的其他科学家和工程师将提供与高温 /高压表征，流体流动和建模 /模拟有关的项目方面的支持。