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| LaTeX Math Block |
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EUR_{ND} = \frac{Q_o}{V_o} = \frac{ (p_i - p_{wf}) \, c_t}{(1-s_{wi})\, B_o} =
\frac{ (p_i - p_{wf}) }{(1-s_{wi})\, B_o} \, \big( c_r + s_{wi} c_w + (1-s_{wi})c_o \big) |
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EUR_{GD} = \frac{Q_g}{V_g} = 1- \frac{p_{wf}}{p_i} |
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EUR_{WF} = E_S \, E_D =+ (1-E_{SV} \, ES) EUR_{SAND} \, E_D |
where where
– displacement – displacement efficiency,
–
sweep efficiency, .mathinline
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Sweep efficiency
| Excerpt Include |
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| Sweep Efficiency |
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| Sweep Efficiency |
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| nopanel | true |
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Water-Oil displacement efficiency
| Excerpt Include |
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| Displacement Efficiency (ED) |
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| Displacement Efficiency (ED) |
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| nopanel | true |
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Sweep effciency
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| LaTeX Math Block |
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E_S = \frac{V_{sweep}}{V_\phi} |
| LaTeX Math Block |
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E_{SA} = \frac{A_{sweep}}{A_\phi} |
| LaTeX Math Block |
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E_{SV} = \frac{h_{sweep}}{h_\phi} |
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– sweep volume – pore volume ...
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– sweep thickness – pore thickness Water displacement efficiency
| LaTeX Math Block |
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E_D = \frac{1-s_{wi}-s_{orw}}{1-s_{wi}} |
where
– inititial water in oil pay, – residual oil to water sweep.
Gas flooding
Motivation = maintain formation pressure at sweep interface with gas in case of high water mobility
| LaTeX Math Inline |
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| body | \frac{k_{rw}}{\mu_w} \gg \frac{k_{ro}}{\mu_o} |
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which makes watrflood inefficient.
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