Fracture Design Screening
Spreadsheet
29 rows x 4 columns
| A | B | C | D | |
|---|---|---|---|---|
| 1 | Fracture Design Screening | |||
| 2 | Design Inputs | |||
| 3 | Injection Rate (per wing) | 15 | bbl/min | |
| 4 | Fluid Viscosity | 100 | cP | |
| 5 | Fracture Height | 50 | ft | |
| 6 | Young's Modulus | 4000000 | psi | |
| 7 | Poisson's Ratio | 0.25 | dimensionless | |
| 8 | Fracture Half-Length | 500 | ft | |
| 9 | Reservoir Permeability | 1 | mD | |
| 10 | Fracture Permeability | 50000 | mD | |
| 11 | Wellbore Radius | 0.354 | ft | |
| 12 | ||||
| 13 | PKN Geometry | |||
| 14 | Max Width at Wellbore | 0.2500540625 | inches | |
| 15 | Average Width | 0.1963920014 | inches | |
| 16 | Fracture Volume (1 wing) | 48.58167432 | bbl | |
| 17 | Net Pressure | 889.081111 | psi | |
| 18 | ||||
| 19 | Production Improvement | |||
| 20 | CfD | 1.636600012 | dimensionless | |
| 21 | Equivalent Skin | -5.887080711 | dimensionless | |
| 22 | ||||
| 23 | Sensitivity to Half-Length | |||
| 24 | Xf (ft) | Width (in) | CfD | Seq |
| 25 | 200 | 0.1988606765 | 3.25385021 | -5.249730052 |
| 26 | 300 | 0.2200755152 | 2.400651465 | -5.545703093 |
| 27 | 500 | 0.2500540625 | 1.636600012 | -5.887080711 |
| 28 | 750 | 0.2767303099 | 1.207463762 | -6.132081623 |
| 29 | 1000 | 0.2973660702 | 0.9731281892 | -6.292119031 |
| Name | Refers To | Comment |
|---|---|---|
| Q_inj | $B$3 | Injection rate per wing, bbl/min |
| Ul | $B$4 | Frac fluid viscosity, cP |
| h_f | $B$5 | Fracture height, ft |
| E | $B$6 | Young's modulus, psi |
| nu | $B$7 | Poisson's ratio |
| Xf | $B$8 | Fracture half-length, ft |
| K | $B$9 | Reservoir permeability, mD |
| Kf | $B$10 | Fracture permeability, mD |
| Rw | $B$11 | Wellbore radius, ft |
Description
Screen a hydraulic fracture design using PKN geometry to predict fracture dimensions, then evaluate production improvement via equivalent skin and dimensionless conductivity (CfD). Answers the question: "Is this well a good fracture candidate, and what production uplift can I expect?"
Decision criteria: CfD > 10 = effectively infinite conductivity (fracture not limiting). CfD < 1 = fracture conductivity is limiting, consider wider proppant pack.
Workflow
- Inputs: Rock mechanics (E, ν, G), fluid/proppant (μ, Kf), well/reservoir (k, h, rw, Xf)
- Step 1: Compute PKN fracture width and net pressure
- Step 2: Calculate fracture volume and average width
- Step 3: Evaluate CfD and equivalent skin factor
- Output: Fracture geometry, conductivity, and production improvement estimate
How to use this blueprint
- In Excel, go to the Petroleum Office ribbon tab and click Blueprint Manager
- Search for Fracture Design Screening
- Click on the blueprint to preview
- Click Insert to place it into your worksheet. Modify the input values to match your data.