Experimental data from brine-CO2 flow-through test on a 45% porosity synthetic sandstone under shallow storage reservoirs conditions

The spreadsheet gathers the data collected during a brine:CO2 flow-through experiment conducted on a weakly-cemented synthetic sandstone core sample using the multiflow experimental rig for CO2 experiments, designed and assembled at the National Oceanography Centre, Southampton. The test was configured to assess geophysical monitoring and deformation of reservoirs subjected to CO2 injection in shallow weakly-cemented (North Sea-like, e.g., Sleipner) CO2 storage sandstone reservoirs. The tests was conducted in the rock physics laboratory at the National Oceanography Centre, Southampton, during 2015-2016, as part of the DiSECCS project with funding from the United Kingdom’s Engineering and Physical Sciences Research Council (EPSRC grant EP/K035878/1) and the Natural Environment Research Council (NERC). The experiment was a steady state brine-CO2 flow-through test in which realistic shallow CO2 geosequestration conditions were simulated, to related geophysical signatures to the hydrodynamic and geomechanical behaviour of the rock sample. The confining and pore pressure conditions were similar to those estimated for shallow North Sea Sleipner-like, storage reservoirs, but simulating inflation/depletion cyclic scenarios for increasing brine:CO2 fractional flow rates. The data include ultrasonic P- and S-wave velocities and their respective attenuation factors, axial, radial and volumetric strains, and electrical resistivity; also relative permeability to both fluids (CO2 and brine) is displayed as a function of pore volume times, associated to increasing CO2 to brine contents in the sample.本电子表格收录了基于弱胶结人工砂岩岩心样品开展的盐水-二氧化碳（brine:CO₂）渗流实验所采集的数据，该实验使用由南安普顿国家海洋学中心（National Oceanography Centre, Southampton）设计组装的二氧化碳多流态实验装置完成。本次实验旨在评估浅埋弱胶结类北海斯莱普内尔（Sleipner）型二氧化碳封存砂岩储层在注入二氧化碳后的地球物理监测效果与储层形变情况。实验于2015至2016年间在南安普顿国家海洋学中心岩石物理实验室开展，属于DiSECCS项目的一部分，该项目由英国工程与自然科学研究理事会（EPSRC，资助编号EP/K035878/1）与英国自然环境研究理事会（NERC）提供资助。本实验为稳态盐水-二氧化碳渗流实验，模拟了真实的浅埋二氧化碳地质封存条件，旨在将岩心样品的地球物理响应特征与其流体动力学及岩土力学行为建立关联。实验设置的围压与孔隙压力条件与类北海斯莱普内尔型浅埋封存储层的估算值相近，同时通过调整盐水-二氧化碳分流比，模拟了增压/泄压循环工况。本次实验采集的数据包括超声波纵波（P波）与横波（S波）速度及其各自的衰减系数、轴向、径向与体积应变以及电阻率；同时还展示了两种流体（二氧化碳与盐水）的相对渗透率随孔隙体积倍数的变化关系，该关系与岩心样品内二氧化碳与盐水占比的提升相关联。