Table 3 Relationship between T2 relaxation time and pore characteristics.
From: Permeability regain and aqueous phase migration during hydraulic fracturing shut-ins
T2 relaxation time/ms | Pore radius/μm | Pore type |
|---|---|---|
T2 relaxation time ≤ 1 | pore radius ≤ 2 | micropore |
1 < T2 relaxation time ≤ 10 | 2 < pore radius ≤ 10 | small mesopore |
10 < T2 relaxation time ≤ 50 | 10 < pore radius ≤ 20 | mesopore |
50 < T2 relaxation time | 20 < pore radius | macropore |
