Stochastic Interpretation of CO2-Brine Primary Displacement in Heterogeneous Carbonate Rocks
Research output: Contribution to conference βΊ Presentation βΊ Research βΊ peer-review
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Abstract
CO2 migration is affected by rock heterogeneity but is not reflected in the relative permeability (ππ(ππ€)) and capillary pressure (ππ(ππ€)) saturation functions measured by special core analysis (SCAL). We present a first step to an upscaling workflow that combines state-of-the-art SCAL interpretations with continuum-scale experiments on the next larger scale where heterogeneities dictate CO2-brine displacement. By numerical interpretation using 1D homogeneous and 3D heterogeneous simulation domains, we show that an effectively upscaled ππ(ππ€) is substantially out of the uncertainty range of classical SCAL measurements used for ππ(ππ€) quantification. Alternatively, by including porosity, permeability and capillary heterogeneity, the SCAL-derived relative permeability is well applied. However, this effectively corresponds to downscaling and is therefore of little value for reservoir simulations. Our results demonstrate the following: (a) simple USS experiments can be used to investigate the influence of capillary heterogeneity on ππ(ππ€), and (b) a rigorous upscaling procedure including rock heterogeneity on various scales is needed to use standard workflows such as special core analysis for CCS developments in carbonates.
Details
Original language | English |
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Publication status | Published - 2023 |
Event | International Symposium of the Society of Core Analysts - United Arab Emirates, Abu Dhabi Duration: 9 Oct 2023 β 12 Oct 2023 |
Conference
Conference | International Symposium of the Society of Core Analysts |
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City | Abu Dhabi |
Period | 9/10/23 β 12/10/23 |