This document details Datarock’s product Dominant Colour.
Contents
Literature
This product is based on the following literature:
Title | Author | Year |
Dependent Models
The imagery only needs to have passed through Depth Registration in order to process Dominant Colour.
Data Processing
The following steps are taken to determine the Dominant Colour of a row image.
Take the output of the fracture detection model, “simple” classes only
Run a segmentation model to extract the fracture profile (or skeleton)
Determine its angle and curvature
For a given 3m interval, plot each measurement of angle and curvature on the plot shown below
Create 45° bins for fracture angles, slide left/right to minimise number of bins
If there are three or more fractures in a bin, a set is assigned. Other fractures are designated random.
Combine the measured values of each fracture with “complex” fracture detections as per the flowchart below.
Number of Sets | Random Joints Present? | Description | Jn |
---|---|---|---|
0 | No | No joints | 0.5 |
0 | Yes | Random joints | 1.0 |
1 | No | One set | 2.0 |
1 | Yes | One set + random | 3.0 |
2 | No | Two sets | 4.0 |
2 | Yes | Two sets + random | 6.0 |
3 | No | Three sets | 9.0 |
3 | Yes | Three sets + random | 12.0 |
4 | No | >4 sets - heavily jointed | 15.0 |
5 | No | Crushed rock | 20.0 |
Product Configuration Options
Configuration | Options |
---|---|
t_1 threshold (see flowchart above) | Threshold can be set to any value. Default value is 30% |
t_2 threshold (see flowchart above) | Threshold can be set to any value. Default value is 20% |
t_3 threshold (see flowchart above) | Threshold can be set to any value. Default value is 10% |
t_4 threshold (see flowchart above) | Threshold can be set to any value. Default value is 0% |
Output Intervals
Default interval length: 3.0m
Customisable interval available: No
User Data
User data may be uploaded to the platform via csv in the following format:
· HoleID_sampling_intervals_joint_sets.csv
CSV file to contain the following headers:
File Header | Description |
depth_from | Start of interval |
depth_to | End of interval |
jn | Joint Set Number logged on site. This is an optional field. |
Data Output
Results from this product is delivered in a batch nature.
Integration of the required technologies into Datarock production is ongoing.
The available CSV files include the following:
ProjectID_Joint_Set_Analysis_3m.csv
File Header | Description |
hole_id | Customer’s Hole ID |
depth_from | Start of interval |
depth_to | End of interval |
jn | Joint Set Number as defined in the Q-System |
jn_description | Joint Set Number description as defined in the Q-System |
timestamp | Time of joint set calculations |
version | A model version identifier |
Product Limitations
Limitations | Comments |
Measurements are taken on simple, single interface fractures only. | This method is based on measurements of simple, single interface fractures, and assumed parameters for broken zones. It is recommended that these assumptions be verified based on customer’s logging schema. |
Document Version
Version | Date | Author | Rationale |
1 | 6 Sep 2022 | S Johnson | Initial release |
2 | 9 Mar 2023 | S Johnson | Updated with Jn table |
3 | 18 July 2023 | S Johnson | Updated for custom intervals |