Quantitative assessment of the Aquistore CO₂ storage reservoir has been conducted using a 30 km² 3D seismic volume and a suite of well logs. 3D porosity was calculated using acoustic impedance from model-based seismic inversion and a log-based porosity-impedance relation. The reservoir has a mean thickness of 219 m ±ơ = 3% comprising 51% of pay. Strata dip at ∼1.75% SSE and include a prominent SSE-NNW structural fabric dominated by a ridge that corresponds to a Precambrian basement fault and overlying flexure. Porosity maps for Black Island and Deadwood reservoir zones show mean interval porosities of 0.071 ± ơ = 18% and 0.075 ± ơ = 9%, respectively with a weak degree of directionality that is sub-parallel to the strong NNW-SSE structural trends. Lateral spread of injected CO₂ will be strongly affected by the NNW-trending structural relief and bulk porosity/permeability trends. Local topographic channels may control CO₂ flow particularly when injection rates are low and local closed topographic structures may constitute traps for CO₂. CO₂ static capacity estimates from well-based mean values are less than comparable seismic-based estimates by <15% due to porosity differences and <5% due to thickness differences. Variations in the Deadwood thickness of up to 25 m from the mean value would have resulted in capacity estimate differences of up to 25% if an alternate well location had been chosen.

已使用30 km ² 3D地震体积和一套测井仪对Aquistore CO ₂储层进行了定量评估。使用基于模型的地震反演和基于对数的孔隙度-阻抗关系的声阻抗来计算3D孔隙度。所述贮存器具有219米±O = 3％的平均厚度，其包括51％的报酬。地层倾角约为SSE的1.75％，包括一个突出的SSE-NNW结构织物，该结构织物由与前寒武纪基底断层和上覆弯曲相对应的山脊为主。黑岛和沉木储层的孔隙度图分别显示平均层间孔隙度为0.071±ơ= 18％和0.075±ơ= 9％，方向性较弱，与强NNW-SSE结构趋势不相平行。NNW趋势结构起伏和整体孔隙率/渗透率趋势将严重影响注入的CO _2的横向扩散。局部地形通道可以控制CO ₂流量，尤其是在注入速率较低且局部封闭的地形结构可能构成CO ₂捕集阱的情况下。一氧化碳₂由于孔隙率差异，基于井的平均值得出的静态容量估计值比基于地震的估计值要低<15％，而由于厚度差异则要小于<5％。如果选择了备用井位，则沉渣厚度与平均值之间的差异最大为25 m，这将导致产能估计差异最大为25％。