Modelling the multi-scale spatial variations in the geomechanical properties within the discontinuities of the Sherwood Sandstone Group and their infl

该研究的目的是建立一个三维流体流动模型，预测在Sherwood砂岩群（SSG）不同相中不连续面对储氢和采收率的影响。将解决三个研究问题：影响储层尺度储氢性能的SSG不连续层的关键孔隙尺度特征是什么？在参数化、开发、测试和验证氢气储存和开采的3D概率地质模型时，SSG的流体流动特性有哪些影响？如何对模型的变量和不确定性的敏感性进行量化和定性，以便向决策者和工业界传达这些信息？SSG作为油气储层和地下水的重要来源，对英国来说非常重要。它也有可能通过充当二氧化碳的储存库或临时储存氢的储存库来帮助应对一些迫在眉睫的气候挑战，从而支持英国政府的能源转型和2050年净零排放目标。然而，不连续性，如变形带，有可能限制SSG的优势，潜在地限制横向流动。为了更好地模拟储层容量及其对循环扰动的响应，我们需要进一步了解不连续面对不同相储层储量和采收率的影响，以便我们能够有效地管理资源，避免潜在的危险和昂贵的破坏性干预措施，例如Snohvit油田异常压力增加所造成的影响。更好地理解SSG的性质将进一步加深我们对其他砂岩地层的理解，提高我们在全球范围内利用地质资源的能力。这项研究的潜在影响是：改进英国地下战略。它将为英国政府提供关于我们的资源范围及其地理位置的科学基础，影响氢运输成本和大型工业过程与储存地点的接近程度，使他们能够制定关于氢网络的明确政策，并将资源集中用于与碳捕获和储存等其他技术建立综合基础设施。消除氢经济的一些障碍，这是英国政府最近通过大量投资实现其排放目标的三条途径之一。存储和有效检索是这项相对不成熟的技术的重要组成部分。新发现的储氢地质区域。目前，氢储存在溶解法开采的岩盐洞穴中；了解孔隙空间储存的潜力可以使更多的地质单元被确定为潜在的宿主，从而在远离层状岩盐适宜聚集的预计氢气需求区域增加潜在地点的地理范围。降低储氢成本。确定储存地点及其流体性质将降低行业的研究和勘探成本，使资源能够瞄准最有可能成功的区域，并为公司和集群提供对所涉及成本的更现实的了解。总体效果将是通过减少信息和成本障碍，加速英国工业、国内和运输部门实现净零排放目标。这项研究还将与SSG中其他有潜力的技术的储能相关，包括含水层热和压缩空气储能。

The aim of the research is to develop a 3D fluid flow model predicting the effect of discontinuities on hydrogen storage and recovery within different facies of the Sherwood Sandstone Group (SSG).Three research questions will be addressed:What are the key pore scale characteristics within the discontinuities of the SSG that affect the reservoir scale H2 storage properties?What are the influential fluid flow properties of the SSG that are needed to parameterise, develop, test and validate a 3D probabilistic geological model for H2 storage and recovery?How can the sensitivities of the variables and uncertainties of the model be quantified and characterised so that they can be communicated to policymakers and industry?The SSG is important to the UK as a hydrocarbon reservoir and as a significant source of groundwater. It also has potential to help with some of the imminent climate challenges by potentially acting as storage reservoir for CO2 or reservoir for the temporary storage of hydrogen, thereby supporting the energy transition and Net Zero 2050 goals by the UK government. However, discontinuities, such as deformation bands, have the potential to restrict the advantages of the SSG, potentially limiting lateral flow. Further understanding of the effect of discontinuities on storage and recovery capabilities of different facies at field scale is needed to better model reservoir capacity and its response to cyclic perturbations so that we can manage our resources effectively, avoiding potential hazards and costly and disruptive interventions, such as those created by anomalous pressure increases at Snohvit. A better comprehension of SSG properties will further our understanding of other sandstone formations and improve our ability to use geological resources globally.Potential impacts of this research are:Improved UK subsurface strategy. It will provide a scientific foundation for the UK Government regarding the extent of our resources and their geographical locations, impacting upon hydrogen transportation costs and the proximity of large industrial processes to storage sites, enabling them to create clear policy about the hydrogen network and focus resources toward building an integrated infrastructure with other technologies such as carbon capture and storage.Removal of some barriers to a hydrogen economy, one of the UK Government's three pathways towards achieving its emissions goals with recent substantial investment. Storage and effective retrieval is an essential part of this relatively immature technology.Newly identified geological domains for hydrogen storage. Currently hydrogen is stored in solution-mined caverns in halite; understanding the potential for pore space storage could allow additional geological units to be identified as potential hosts, increasing the geographical extent of potential sites in areas of projected hydrogen demand remote from suitable accumulations of bedded halite.Reduction in hydrogen storage costs. Identification of storage sites and their fluid properties will cut research and exploration costs of industry, allowing resources to be targeted at areas with maximum chance of success, and providing companies and clusters with a more realistic understanding of the costs involved.The overall effect will be to accelerate the UK industrial, domestic and transport sectors towards the Net Zero targets by reducing information and cost barriers to their implementation. This research will also be relevant to energy storage for other technologies with potential in the SSG, including aquifer thermal and compressed air storage.