Experimental Study on the Distribution of Retained Fracturing Fluids and Its Effect on the Permeability and Wettability in Tight Oil Reservoirs

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2023/9740015/figures/9740015.fig.003a.svgz" name="9740015.fig.003a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Original sample</td></tr><tr class="fig-image" id="b"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2023/9740015/figures/9740015.fig.003b.svgz" name="9740015.fig.003b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Saturated water sample</td></tr><tr class="fig-image" id="c"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2023/9740015/figures/9740015.fig.003c.svgz" name="9740015.fig.003c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Oil displacement water</td></tr><tr class="fig-image" id="d"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2023/9740015/figures/9740015.fig.003d.svgz" name="9740015.fig.003d" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(d) </b>Water drive oil</td></tr><tr class="fig-image" id="e"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2023/9740015/figures/9740015.fig.003e.svgz" name="9740015.fig.003e" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(e) </b>Oil reverse displacement water</td></tr></table>

<div>Pseudocolor NMR images of different stages of core slice A-1.</div>

Geofluids

fig3

Figure 3

Figure 3: Experimental Study on the Distribution of Retained Fracturing Fluids and Its Effect on the Permeability and Wettability in Tight Oil Reservoirs 

Figure 3 | Experimental Study on the Distribution of Retained Fracturing Fluids and Its Effect on the Permeability and Wettability in Tight Oil Reservoirs 