Supercritical(CO2Carbon dioxide) Conditions where carbon dioxide has some characteristics of a gas and some of a liquid CO2Carbon dioxide is much less viscous than water and oil (by an order of magnitude or more) and this induces a considerable mobility difference between CO2Carbon dioxide and in-situ formationA body of rock of considerable extent with distinctive characteristics that allow geologists to map, describe, and name it fluids. Due to this difference, only some of the oil and water can be displaced and viscous fingeringFlow phenomenon arising from the flow of two largely immiscible fluids through a porous medium can cause CO2Carbon dioxide to bypass much of the pore spaceSpace between rock or sediment grains that can contain fluids, depending on the heterogeneity and anisotropy of rock permeabilityAbility to flow or transmit fluids through a porous solid such as rock. Viscous fingeringFlow phenomenon arising from the flow of two largely immiscible fluids through a porous medium leads to an average saturation of CO2Carbon dioxide in the range of 30-60% left behind in the reservoirA subsurface body of rock with sufficient porosityMeasure for the amount of pore spaceSpace between rock or sediment grains that can contain fluids in a rock and permeabilityAbility to flow or transmit fluids through a porous solid such as rock to store and transmit fluids. On the other hand, viscous fingeringFlow phenomenon arising from the flow of two largely immiscible fluids through a porous medium is limited in the natural gasGas stored underground; It consists largely of methane, but can also contain other hydrocarbons, water, hydrogen sulphide and carbon dioxide, these other substances are separated before the methane is put into a pipeline or tanker reservoirs since CO2Carbon dioxide is more viscous than natural gasGas stored underground; It consists largely of methane, but can also contain other hydrocarbons, water, hydrogen sulphide and carbon dioxide, these other substances are separated before the methane is put into a pipeline or tanker. Lengler et al., 20102010 - U. Lengler, M. De Lucia and M. KühnThe impact of heterogeneity on the distribution of CO2: Numerical simulation of CO2 storage at Ketzinsee more recommends the use of 3D simulations when processes are active in two main planes, that is, gravity effects in the vertical plane and viscous fingeringFlow phenomenon arising from the flow of two largely immiscible fluids through a porous medium and channelling in the horizontal plane. Silin et al., 20092009 - D. Silin, T. W. Patzek and S. M. BensonA one-dimensional model of vertical gas plume migration through a heterogeneous porous mediumsee more and Lengler et al., 20102010 - U. Lengler, M. De Lucia and M. KühnThe impact of heterogeneity on the distribution of CO2: Numerical simulation of CO2 storage at Ketzinsee more stated that the dispersion of the front of the plume is caused by the heterogeneity, rather than a consequence of intrinsic instabilities such as viscous fingeringFlow phenomenon arising from the flow of two largely immiscible fluids through a porous medium.