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Table 3 Time interval (∆t) with start and end values in parentheses, average borehole pressure (Pb), increase in outlet pressure (∆P), and permeability index (ki) for each direction at each flow rate in Run 1
Flow rate (mL/min) | Direction | ∆t (s) | Pb (MPa) | ∆P (MPa) | ki (s−1) |
|---|---|---|---|---|---|
1 (1st use) | σ2 (L) | 600 (600–1200) | 1.3 | 0.5 | 6 × 10–4 |
σ2 (R) | 600 (600–1200) | 1.3 | 0.5 | 6 × 10–4 | |
σ3 (F) | 600 (600–1200) | 1.3 | 0.6 | 8 × 10–4 | |
σ3 (B) | 600 (600–1200) | 1.3 | 0.7 | 9 × 10–4 | |
5 | σ2 (L) | 550 (250–800) | 1.6 | 1.2 | 1 × 10–3 |
σ2 (R) | 550 (250–800) | 1.6 | 1.0 | 1 × 10–3 | |
σ3 (F) | 550 (250–800) | 1.6 | 1.1 | 1 × 10–3 | |
σ3 (B) | 550 (250–800) | 1.6 | 1.1 | 1 × 10–3 | |
15 | σ2 (L) | 200 (150–350) | 1.6 | 0.6 | 2 × 10–3 |
σ2 (R) | 200 (150–350) | 1.6 | 0.5 | 2 × 10–3 | |
σ3 (F) | 200 (150–350) | 1.6 | 0.7 | 2 × 10–3 | |
σ3 (B) | 200 (150–350) | 1.6 | 0.3 | 9 × 10–4 | |
1 (2nd use) | σ2 (L) | 500 (1700–2200) | 1.5 | 0.5 | 7 × 10–4 |
σ2 (R) | 500 (1700–2200) | 1.5 | 0.5 | 7 × 10–4 | |
σ3 (F) | 500 (1700–2200) | 1.5 | 0.6 | 8 × 10–4 | |
σ3 (B) | 500 (1700–2200) | 1.5 | 0.7 | 9 × 10–4 |