在二氧化碳封存项目中，验证已封堵和废弃历史油井的完整性对监管机构、利益相关者和运营商而言至关重要。二氧化碳的腐蚀性可能会影响此类油井的完整性，从而危及二氧化碳的长期封存。本研究展示了一个专为二氧化碳封存应用而设计的建模框架的新功能，该框架能够对已封堵和废弃历史油井的长期完整性进行定量、基于风险的评估。为了解决关键问题，该集成框架新增了三个建模模块。
封井弃置（P&A）框架将所有井流路径转化为数值化的、空间离散化的、基于网格的数字表示。多种网格单元类型代表不同的井筒组件（例如，完整和受损的水泥、套管、油管、储层和充满流体的环空）。每个单元都被赋予相应的流体流动属性。
Demonstrating the integrity of plugged and abandoned legacy wells during CO2 storage projects is a crucial requirement for regulators, stakeholders, and operators. The corrosive nature of CO2 may affect the integrity of such wells, jeopardizing the long-term containment of the CO2. This study illustrates the new capabilities, tailored for CO2 storage applications, of a modeling framework that provides a quantitative, risk-based assessment of the long-term integrity of legacy plugged and abandoned wells. Three new modeling modules are added to this integrated framework to account for key concerns.
The plugging and abandonment (P&A) framework translates all well-flow paths into a numerical, spatially discretized, grid-based, digital representation. Multiple grid cell types represent the various well components (e.g., intact and impaired cement, casing, tubing, reservoir formation, and fluid-filled annular space). Appropriate fluid-flow properties are allocated to each cell.
