Spontaneous Imbibition Experiment and Main Influence Factors in Ultra-Low-Permeability Reservoirs

Figure 4

Nuclear magnetic resonance T₂ spectrum curves. (a) Spontaneous imbibition 168 h and 0.02 mL/min displacement T₂ spectrum (core 3-1); (b) spontaneous imbibition 168 h and 0.02 mL/min displacement T₂ spectrum (core 3-2); (c) spontaneous imbibition 168 h and 0.04 mL/min displacement T₂ spectrum (core 3-1); (d) spontaneous imbibition 168 h and 0.04 mL/min displacement T₂ spectrum (core 3-2); (e) spontaneous imbibition 168 h and 0.06 mL/min displacement T₂ spectrum (core 3-1); (f) spontaneous imbibition 168 h and 0.06 mL/min displacement T₂ spectrum (core 3-2).

(a)

(b)

(c)

(d)

(e)

(f)