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Line 17: − + − [[file:waterflooding_fig1.png|thumb|left|{{figure number|1}}Flooding patterns. (From <ref name=pt10r8>Craig, F. F., 1971, Reservoir engineering aspects of waterflooding: Richardson, TX, Society of Petroleum Engineers Monograph Series, v. 3.</ref>.)]]+ − + − [[file:waterflooding_fig2.png|thumb|{{figure number|2}}[[Permeability]] variation example problem. (From <ref name=pt10r8 />.)]]+ − + − [[file:waterflooding_fig3.png|thumb|left|{{figure number|3}}Vertical sweep efficiency (coverage) as a function of WOR, ''M'', and permeability variation (''V''<sub>DP</sub>), where WOR = 5. (From <ref name=pt10r11 />.)]]+ − + − [[file:waterflooding_fig4.png|thumb|{{figure number|4}}Vertical sweep efficiency (coverage) as a function of WOR, ''M'', and permeability variation (''V''<sub>DP</sub>), where WOR = 0.1. (From <ref name=pt10r11 />.)]]+ − − [[file:waterflooding_fig5.png|thumb|left|{{figure number|5}}Effect of mobility ratio on oil production for the five-spot pattern.<ref name=pt10r8 />]] − − [[file:waterflooding_fig6.png|thumb|{{figure number|6}}Effect of directional permeability on sweep efficiencies for varied degrees of permeability anisotropes at a fluid mobility ratio of 1.<ref name=pt10r19>Landrum, B. L., Crawford, P. B., 1960, Petroleum Transactions, AIME, v. 219, p. 407.</ref>]]
→Quick estimation of waterflood recovery
==Quick estimation of waterflood recovery==
==Quick estimation of waterflood recovery==
<gallery mode=packed heights=200px widths=200px>
waterflooding_fig1.png|{{figure number|1}}Flooding patterns.<ref name=pt10r8>Craig, F. F., 1971, Reservoir engineering aspects of waterflooding: Richardson, TX, Society of Petroleum Engineers Monograph Series, v. 3.</ref>
waterflooding_fig2.png|{{figure number|2}}[[Permeability]] variation example problem.<ref name=pt10r8 />]]
waterflooding_fig3.png|{{figure number|3}}Vertical sweep efficiency (coverage) as a function of WOR, ''M'', and permeability variation (''V''<sub>DP</sub>), where WOR = 5.<ref name=pt10r11 />
waterflooding_fig4.png|{{figure number|4}}Vertical sweep efficiency (coverage) as a function of WOR, ''M'', and permeability variation (''V''<sub>DP</sub>), where WOR = 0.1.<ref name=pt10r11 />
waterflooding_fig5.png|{{figure number|5}}Effect of mobility ratio on oil production for the five-spot pattern.<ref name=pt10r8 />
waterflooding_fig6.png|{{figure number|6}}Effect of directional permeability on sweep efficiencies for varied degrees of permeability anisotropes at a fluid mobility ratio of 1.<ref name=pt10r19>Landrum, B. L., Crawford, P. B., 1960, Petroleum Transactions, AIME, v. 219, p. 407.</ref>
</gallery>
The overall recovery (''E''<sub>R</sub>) is a product of displacement efficiency (''E''<sub>D</sub>), invasion or vertical sweep efficiency (''E''<sub>V</sub>) and the pattern or areal sweep efficiency (''E''<sub>P</sub>).
The overall recovery (''E''<sub>R</sub>) is a product of displacement efficiency (''E''<sub>D</sub>), invasion or vertical sweep efficiency (''E''<sub>V</sub>) and the pattern or areal sweep efficiency (''E''<sub>P</sub>).