Capillary Pressure Models
Spreadsheet
30 rows x 4 columns
| A | B | C | D | |
|---|---|---|---|---|
| 1 | Capillary Pressure Models | |||
| 2 | Common Parameters | |||
| 3 | Swi | 0.2 | fraction | |
| 4 | ||||
| 5 | Brooks-Corey Parameters | |||
| 6 | Pd (entry pressure) | 5 | psi | |
| 7 | lambda | 2 | - | |
| 8 | ||||
| 9 | Van Genuchten Parameters | |||
| 10 | alpha | 0.1 | 1/psi | |
| 11 | n | 2.5 | - | |
| 12 | ||||
| 13 | Leverett J Parameters | |||
| 14 | k (permeability) | 100 | mD | |
| 15 | phi (porosity) | 0.2 | fraction | |
| 16 | IFT | 30 | dyne/cm | |
| 17 | theta (contact angle) | 0 | degrees | |
| 18 | ||||
| 19 | Capillary Pressure Curves | |||
| 20 | Sw | Brooks-Corey Pc | Van Genuchten Pc | J-function |
| 21 | 0.25 | 20 | 63.24529994 | 3.228854798 |
| 22 | 0.3 | 14.14213562 | 39.49523275 | 2.283145123 |
| 23 | 0.35 | 11.54700538 | 29.76142116 | 1.864180187 |
| 24 | 0.4 | 10 | 24.16697291 | 1.614427399 |
| 25 | 0.5 | 8.164965809 | 17.63176591 | 1.318174451 |
| 26 | 0.6 | 7.071067812 | 13.64482273 | 1.141572562 |
| 27 | 0.7 | 6.32455532 | 10.71615581 | 1.02105354 |
| 28 | 0.8 | 5.773502692 | 8.234015865 | 0.9320900934 |
| 29 | 0.9 | 5.345224838 | 5.736696301 | 0.8629477432 |
| 30 | 1 | 5 | 0 | 0.8072136995 |
Description
Compare capillary pressure curves using Brooks-Corey and Van Genuchten models. Includes Leverett J-function for scaling between different rock types.
Models:
- Brooks-Corey: Pc = Pd × Se^(-1/λ), where Se is normalized saturation
- Van Genuchten: Se = [1 + (αPc)n](-m), where m = 1 - 1/n
- Leverett J-function: Dimensionless Pc for correlating between rocks
Typical Parameters:
- λ (pore size distribution): 0.5-6 (higher = more uniform pores)
- Pd (entry pressure): 1-50 psi for sandstones
- α (Van Genuchten): 0.001-1 [1/psi]
- n (Van Genuchten): 1.5-10 (must be > 1)
How to use this blueprint
- In Excel, go to the Petroleum Office ribbon tab and click Blueprint Manager
- Search for Capillary Pressure Models Comparison
- Click on the blueprint to preview the spreadsheet template
- Click Insert to place it into your worksheet. Modify the input values to match your data.