The importance of carbon capture and storage in mitigating climate change has emerged from the results of techno-economic or integrated assessment modeling, in which scenarios of future energy systems are developed subject to constraints from economic growth and climate change targets. These models rarely include limits imposed by injectivity, ultimate amounts, or the geographic distribution of storage resources. However, they could if a sufficiently simple model were available. We develop a methodology for the fast assessment of the dynamic storage resource of a reservoir under different scenarios of well numbers and interwell distance. The approach combines the use of a single-well multiphase analytical solution and the superposition of pressure responses to evaluate the pressure buildup in a multiwell scenario. The injectivity is directly estimated by means of a nonlinear relationship between flow-rate and overpressure and by imposing a limiting overpressure, which is evaluated on the basis of the mechanical parameters for failure. The methodology is implemented within a tool, named CO2BLOCK, which can optimise site design for the numbers of wells and spacing between wells. Given its small computational expense, the methodology can be applied to a large number of sites within a region. We apply this to analyse the storage potential in the offshore of the UK. We estimate that 25–250 GtCO₂ can be safely stored over an injection time interval of 30 years. We also demonstrate the use of the tool in evaluating tradeoffs between infrastructure costs and maximising injectivity at two specific sites in the offshore UK.

碳捕集与封存在缓解气候变化中的重要性已从技术经济或综合评估模型的结果中浮现出来，在这种模型中，未来能源系统的情景在经济增长和气候变化目标的约束下得以发展。这些模型很少包含注入性，最终数量或存储资源的地理分布所施加的限制。但是，如果有足够简单的模型，他们就可以。我们开发了一种方法，用于在井数和井间距离的不同情况下快速评估储层的动态存储资源。该方法结合了单井多相分析解决方案的使用和压力响应的叠加，以评估多井方案中的压力累积。可通过流速与超压之间的非线性关系以及施加极限超压直接估计喷射能力，该极限超压是基于故障的机械参数进行评估的。该方法是在名为CO2BLOCK的工具中实现的，该工具可以针对井的数量和井之间的间距优化站点设计。鉴于其较小的计算开销，该方法可以应用于区域内的大量站点。我们将其用于分析英国近海的存储潜力。我们估计25–250 GtCO 可以针对孔的数量和孔之间的间距优化站点设计。鉴于其较小的计算开销，该方法可以应用于区域内的大量站点。我们将其用于分析英国近海的存储潜力。我们估计25–250 GtCO 可以针对孔的数量和孔之间的间距优化站点设计。鉴于其较小的计算开销，该方法可以应用于区域内的大量站点。我们将其用于分析英国近海的存储潜力。我们估计25–250 GtCO₂可以在30年的注射时间间隔内安全保存。我们还演示了该工具在评估基础设施成本和最大程度提高英国近海两个特定地点的注入能力之间的权衡方面的使用。