Motivation = maintain formation pressure at sweep interface with chemical injection and reduce residual oil to EOR sweep s_{or \, eor} < s_{orw}.
(1) | E_D = \frac{1-s_{wi}-s_{ori}}{1-s_{wi}} |
where s_{wi} – inititial water in oil pay, s_{ori} – residual oil to injection sweep.
CО2 injection
See also
Petroleum Industry / Upstream / Production / Field Development Plan / Recovery Methods