Table 1
Basic parameters.
| No. | Parameters | Value | Unit |
|---|---|---|---|
| 1 | Filter cake inner radius, rw | 0.1 | m |
| 2 | Formation inner radius, ra | 0.103 | m |
| 3 | Formation outer radius, re | 2 | m |
| 4 | Constant mudcake thickness, wo | 0.003 | m |
| 5 | Original formation pressure, Pi | 107 | Pa |
| 6 | Overbalance pressure, ΔP | 3 × 106 | Pa |
| 7 | Filter cake porosity, ϕ1 | 0.08 | – |
| 8 | Filter cake compressibility, ct1 | 4 × 10−10 | 1/Pa |
| 9 | Filtrate viscosity in filter cake, μ1 | 0.001 | Pa·s |
| 10 | Filter cake thickness, w1 | wo (1 − e−0.002t) | m |
| 11 | Filter cake permeability, k1 | 0.0005(1 + 3e−0.0005t) | mD |
| 12 | Formation porosity, ϕ2 | 0.1 | – |
| 13 | Formation compressibility, ct2 | 1 × 10−10 | 1/Pa |
| 14 | Filtrate viscosity in formation, μ2 | 0.001 | Pa·s |
| 15 | Formation permeability, k2 | 0.1 | mD |