Examples of CO2 plume in a sentence
Physical and transport properties of brine were estimated using the correlation of Batzle and Wang (27).The model assumes a homogeneous, isotropic reservoir and calculates CO2 plume footprints that result from a single vertical injection well, completed through the total thickness of the formation.
Using this simplification, the equation for the maximum radial extent of the CO2 plume, rmax, which for a constant volumetric injection rate of Qw given by (18) such as those occurring in GS, to be simulated.
Modeling injection into a single formation layer yields an upper bound on the size of the CO2 plume, since injection into multiple stacked formations would yield a smaller footprint.
Estimated CO2 plume footprints for oil and gas fields in the MRCSP region.
The areas outlined in bold-black represent the oil and gas fields (42), and the areas outlined in bold-red represent the estimated CO2 plume footprints resulting from sequestration of 160-million tonnes CO2 in each field over 30 years.CO2 plume that is within the same order of magnitude in size as the very large plumes predicted in our analysis, the cost of acquiring pore space rights could significantly limit economically available sequestration capacity, even if the physical capacity is available.
The results of this analysis are predicated upon the assumption that the examined rock formations exhibit homogeneous and uniform geologic properties, so one should not consider the CO2 plume simulation estimates to be generalizable to all sequestration targets and CO2 injection scenarios.
Figure3 shows that, were the assumptions of our model fully applicable to these reservoirs, the CO2 plume footprints would extend beyond the field boundaries by at least a factor of 8 in each case.
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And for a given entry pressure, a higher van Genuchten m shape parameter yields higher CO2 saturations and also more buoyancy to CO2, which tends to concentrate at the top of the reservoir (Figure 3: compare the lower case, high m shape parameter, with the middle case, low m shape parameter).These differences in the CO2 plume shape will have an effect on the capillary and dissolution trappings of CO2 in the post-injection period33, but the differences have a negligible effect on the injection pressure.
It is therefore beneficial that the cap rock forms a trap with sufficient lateral extent to accommodate the injected CO2 plume.