Page 363 - Enhanced Oil Recovery in Shale and Tight Reservoirs
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Forced imbibition 335
Figure 11.23 Spontaneous imbibition, forced imbibition and cyclic injection for brine.
(huff and soaking and puff injection) were conducted. Fig. 11.23 shows the
tests using brine. For the spontaneous and forced imbibition, basically no oil
came out of the core because the core was oil-wet. The cyclic injection
brought some oil out by depletion. For the low three IFT surfactant
solutions, Figs. 11.24 and 11.25 show the oil recovery from forced
Figure 11.24 Spontaneous imbibition, forced imbibition and cyclic injection for the
low-IFT surfactant solution.
