In the sweep volume expansion experiment, segment fluids were prepared by brine (the hydrogen signal of the segment fluid can be detected by the low-field NMR equipment, and the T 2 spectrum shows an increasing trend), while in the oil recovery efficiency experiment, segment fluids were prepared by brine (Deuterium water) (the hydrogen signal of the segment fluid cannot be detected by the low-field NMR equipment, and the T 2 spectrum shows a decreasing trend).
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Study on Enhanced Oil Recovery of Nanofluid-Polymer Binary Flooding Technology in Medium-High Permeability Reservoirs.
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