In this section
Our research includes exploring fundamental pore scale fluid dynamics, developing digital rocks analysis techniques, increasing the accuracy of field scale reservoir simulation, and evaluating the feasibility of scaling up CO2 storage to climate relevant scales.
@article{Jackson:2019:10.1002/essoar.10500303.1,
author = {Jackson, S and Krevor, S},
doi = {10.1002/essoar.10500303.1},
title = {The Emergent Impacts of Small Scale Capillary Heterogeneity on Field Scale CO2 Flow and Trapping},
url = {http://dx.doi.org/10.1002/essoar.10500303.1},
year = {2019}
}
TY - JOUR
AB - <jats:p>We employ a multi scale approach combining experiments and modelling toelucidate the impacts of small scale (sub-seismic resolution<10m) capillary pressure heterogeneities in field scale CO2flow and trapping. We analyse 48 rock cores (~3cmlength, 4cm diameter) covering the entire 100m interval of the Captain Dsandstone in the Goldeneye field, UK North Sea. We experimentallymeasure porosity, capillary pressure, absolute permeability, relativepermeability and trapping characteristics for the cores, which are usedto create 3D numerical models with heterogeneities defined at the mmscale. These models are validated by predicting experimental X-Ray CTobservations of saturation (mm scale) and pressure measurements (cmscale) at various flow rates and fractional flows of gas-water. Theintrinsic, core scale properties are then used to populate 2D meso scalenumerical simulations (50m x 10m size), with heterogeneities defined atcm scale using a geostatistical representation. We vary the correlationlength and variance of the fields within the bounds of the experimentalobservations to investigate the impacts of small scale heterogeneity onvertical and lateral CO2 plume migration under different Capillary, Bondand Gravity numbers. At low flow potential, layered capillary pressureheterogeneities can speed up lateral plume migration by up to 20%, withgravitational segregation significantly enhancing the migration (SeeFig. 1). In the vertical case, layered heterogeneities can significantlyincrease CO2 trapping, which is further enhanced with the inclusion ofcapillary pressure hysteresis. Finally, we derive capillary limit,upscaled equivalent properties from the meso scale simulations, whichincorporate the impacts of small scale heterogeneity. These are used torepresent the grid block properties in a full field 3D numerical modelof the Goldeneye field (lateral ~5 km, depth 200m). Weanalyse the impact of varying relative permeabilities (with anisotropy)on the field
AU - Jackson,S
AU - Krevor,S
DO - 10.1002/essoar.10500303.1
PY - 2019///
TI - The Emergent Impacts of Small Scale Capillary Heterogeneity on Field Scale CO2 Flow and Trapping
UR - http://dx.doi.org/10.1002/essoar.10500303.1
UR - https://doi.org/10.1002/essoar.10500303.1
ER -