Geomechanical Assessment of CO2 Storage Reservoir Integrity Post-closure (GASRIP)

关闭后二氧化碳封存完整性的地质力学评估 (GASRIP)

• 批准号: NE/R013535/2
• 负责人: Ismael Falcon-Suarez
• 金额: $ 21.04万
• 依托单位: NATIONAL OCEANOGRAPHY CENTRE
• 依托单位国家: 英国
• 项目类别: Fellowship
• 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=NE%2FR013535%2F2
• 关键词: Geomechanical; Assessment; CO2; Storage; Reservoir

Injecting carbon dioxide (CO2) into deep geological formations is recognized worldwide as the only realistic mitigation technology that can reduce current anthropogenic CO2 emissions to meet national targets by 2050. However, Carbon Capture and Storage (CCS) have aroused public concerns over potential surface leakage of CO2 from geological reservoirs, limiting the number of potential storage sites. European countries, including the UK, have considered depleted oil and gas fields and saline aquifers for CO2 storage (e.g. Sleipner field, North Sea), while a number of projects in the United States have focused on CO2 injection for enhanced oil recovery (EOR) in depleted or unconventional hydrocarbon reservoirs.Geological reservoirs are complex systems. Their geomechanical integrity can be affected by CO2-fluid-rock interactions following injection of CO2, which can be quantified in terms of Thermal, Hydrological, Mechanical and Chemical coupled phenomena (THMCs). THMCs induced by CO2 injection can lead to detrimental enhanced seismicity and CO2 leakage to the surface. So, the advent of CCS and EOR-CCS operations has triggered the need for more research to preserve the geomechanical integrity of reservoirs during the whole CO2 storage cycle (lasting 100s years). To date, researchers have focused on the induced changes in the physical properties of the reservoir during CO2 injection (transition from brine-bearing to CO2-bearing formations) and associated overpressure effects. It is generally assumed that following the interruption of CO2 injection, the reservoir pressure decreases, the CO2 plume migrates and natural imbibition leads to aquifer recharge. However, CO2 injection is a drying process that triggers complex salt precipitation phenomena in brine saturated formations. Several studies have focused on the risks associated with porosity and permeability reduction with respect to injection efficiency and storage capacity. A less appreciated fact is that salt crystals growing under confinement have the potential to damage the rock by exerting enormous pressures (haloclasty). After ceasing the CO2 injection, the aquifer recharge leads to salt dissolution and reservoir compaction.The hypothesized reversibility of salt precipitation in CO2 storage contexts has yet to be investigated. Which phenomena do we expect to affect reservoir integrity during the natural aquifer recharge post-CO2 injection? Can we control them? The energy industry is transforming as we move to a lower carbon world; CCS and EOR-CCS are becoming essential practices for the oil and gas industry, a vital sector for the UK economy. Addressing these questions is crucial for the safe CCS operation at the scales needed to mitigate greenhouse gas emissions for the UK, and at the same time improving recovery rates from hydrocarbon reservoirs (e.g., UK North Sea fields). This project seeks to address the UK Industrial Strategy's clean energy agenda by reducing CCS risks, and providing a possible new EOR method.Geomechanical Assessment of CO2 Storage Reservoir Integrity Post-closure (GASRIP) is a project primarily designed to study how CO2-brine induced-salt precipitation/dissolution affects geomechanical integrity of CO2 storage reservoirs. By looking at changes in the elastic, mechanical and transport properties of natural sandstones in the laboratory, GASRIP will assess variations in the mechanical properties in saline siliciclastic reservoirs post-CO2 injection. By analysing carbonate-rich sandstones, GASRIP will determine the mechanical and chemical post-CO2 injection effects on chemically reactive reservoirs. This information is needed for the potential use of salt precipitation in a controlled manner to improve the transport properties and the viable production of oil and gas from tight reservoirs (EOR alternative). By integrating the results in a numerical model, GASRIP will offer a valuable tool for risk assessment of CO2 storage reservoirs post-closure.

将二氧化碳（CO2）注入深层地质形态被认为是唯一的现实缓解技术，它可以在2050年到2050年减少当前的人为二氧化碳的排放，以实现国家目标。但是，碳捕获和存储（CCS）引起了公众对CO2潜在的二氧化碳泄漏的关注，从地质Reservoirs潜在的CO2泄漏，潜在的存储位置，潜在的位置，潜在的位置，数量限制数量。包括英国在内的欧洲国家已经考虑了二氧化碳储存的石油和天然气场和盐水含水层（例如，北海Sleipner Field，北海），而美国的许多项目都集中在二氧化碳注入中，以增强耗油或非常规的水合物储层的油回收（EOR）。注射CO2后，CO2-流体岩石相互作用可以影响它们的地质力学完整性，可以根据热，水文，机械和化学耦合现象（THMC）对其进行量化。二氧化碳注射诱导的THMC会导致地震性增强和二氧化碳泄漏到表面。因此，CCS和EOR-CCS操作的出现引发了更多研究的需求，以在整个CO2存储周期（持续100年年）期间保留储层的地质力学完整性。迄今为止，研究人员一直集中在二氧化碳注射过程中储层物理特性的诱发变化（从含盐水到二氧化碳形成）和相关的过压效应。通常假定在二氧化碳注入中断后，储层压力降低，二氧化碳羽流迁移，自然吸收会导致含水层补给。但是，二氧化碳注射是一种干燥过程，可触发盐水饱和地层中复杂的盐沉淀现象。几项研究集中在与注射效率和存储容量有关的孔隙率和渗透率降低相关的风险上。一个不太理解的事实是，在约束下生长的盐晶体具有通过施加巨大压力（空心成形术）来损害岩石的潜力。停止二氧化碳注入后，含水层充电会导致盐分溶解和储层压实。在二氧化碳储存环境中盐沉淀的假设可逆性尚未研究。在CO2注射后天然含水层补给期间，我们期望哪种现象会影响储层的完整性？我们可以控制它们吗？当我们转向低碳世界时，能源行业正在转变。 CCS和EOR-CCS已成为石油和天然气行业的重要实践，这是英国经济的重要行业。解决这些问题对于减轻英国温室气体排放所需的安全性CCS操作至关重要，同时提高了碳氢化合物储层（例如英国北海田）的回收率。 This project seeks to address the UK Industrial Strategy's clean energy agenda by reducing CCS risks, and providing a possible new EOR method.Geomechanical Assessment of CO2 Storage Reservoir Integrity Post-closure (GASRIP) is a project primarily designed to study how CO2-brine induced-salt precipitation/dissolution affects geomechanical integrity of CO2 storage reservoirs.通过查看实验室天然砂岩的弹性，机械和运输特性的变化，GASRIP将评估CO2注射后盐水硅质塑料储层机械性能的变化。通过分析富含碳酸盐的砂岩，Gasrip将确定CO2后CO2注射对化学反应性储层的影响。可能需要以受控的方式使用盐沉淀来改善运输特性和从紧密储层（EOR替代品）生存的生存。通过将结果整合到数值模型中，GasRip将为关闭后二氧化碳存储储层的风险评估提供有价值的工具。

项目成果

Introduction to this special section: The role of geophysics in a net-zero-carbon world

本专题介绍：地球物理学在净零碳世界中的作用

• DOI: 10.1190/tle40040244.1
• 发表时间: 2021
• 期刊: The Leading Edge
• 作者: Falcon-Suarez I

Experimental assessment of the stress-sensitivity of combined elastic and electrical anisotropy in shallow reservoir sandstones

• DOI: 10.1190/geo2019-0612.1
• 发表时间: 2020-09
• 期刊: GEOPHYSICS
• 影响因子: 3.3
• 作者: I. Falcon‐Suarez;L. North;B. Callow;G. Bayrakci;J. Bull;A. Best

CO 2 -Brine Substitution Effects on Ultrasonic Wave Propagation Through Sandstone With Oblique Fractures

CO 2 -盐水替代对超声波在斜裂缝砂岩中传播的影响

• DOI: 10.1029/2020gl088439
• 发表时间: 2020
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Falcon-Suarez I

Core-scale geophysical and hydromechanical analysis of seabed sediments affected by CO2 venting

受二氧化碳排放影响的海底沉积物的岩心尺度地球物理和流体力学分析

• DOI: 10.1016/j.ijggc.2021.103332
• 发表时间: 2021
• 期刊: International Journal of Greenhouse Gas Control
• 影响因子: 3.9
• 作者: Falcon-Suarez I

Joint elastic-electrical monitoring for detecting and quantifying CO2-induced salt precipitation during geological carbon and storage

联合弹性电监测用于检测和量化地质碳和储存过程中二氧化碳引起的盐沉淀

• DOI: 10.5194/egusphere-egu21-9920
• 发表时间: 2021
• 作者: Falcon-Suarez I