Table 3 The geometric characteristics of the fitted fracture morphology.
Fracture morphology type | Geometric characteristics | Reservoir response |
|---|---|---|
Single main fracture | Linear extension dominant (fracture length > 300 m, fracture width < 3 mm), branch fractures < 2 per m³, FCI < 1.5 | Limited conductivity (< 50 D), EUR increase < 30% |
Multi-level branching fracture network | Main fracture + multiple clusters of branches (fracture length 200–500 m, fracture width 3–8 mm), intersection points > 4 per m², FCI > 2.5 | Establishes three-dimensional seepage channels (permeability > 100D), EUR increase 2–3 times |
Discrete complex fracture clusters | No dominant fracture direction, fracture length < 100 m but density > 10 fractures/m³, FCI > 3.0 | Applicable to ultra-low permeability reservoirs (< 0.01 mD), modified volume |
