2.1.12 Fracture Density - Proximity
Fracture density attribute is used to highlight the areas of high dense fractures.
- Improves visualization of potential fracture anomalies.
- It computes the ratio of “number of traces classified as being fractures” to the “total number of traces present”, in a circle of given radius along Z-slices.
- Whether a particular trace can be defined as being part of a fracture, is determined by a user-specified threshold, on various curvature/coherence related attributes such as Max Curvature.
Input Data: Max Curvature
Determine anomaly threshold: 0.004
Output: Density
Radius to scan: A radius for scanning and computing the density of fracture anomalies is also required. Use 400m in this example.
Fracture Proximity
It is an attribute is useful in pin-pointing locations with maximum fracture activity, within a user-defined radius.
- This “radius” can for example be linked to tracking radius for drilling.
- It computes the lateral distance (i.e. along Z-slice) from a trace location classified as a fracture.
Input Data: Max Curvature (Input data should be a discontinuity attribute, e.g. Similarity and Curvature)
Determine anomaly threshold: Threshold value of input discontinuity attribute above which a fracture anomaly is expected. In this example use 0.004
Output: Proximity
