PTBA Internship Report · internship-4-u43
Electrofacies — roof of Seam A1
The internship panel compares the core-defined A1 interval across three boreholes with its wireline character. Here the diagnostic target is the coal-top boundary: the upward change into a finer, generally higher-gamma roof is more important than the shape of the coal trace in isolation.
SOURCE-LED TECHNICAL READING
Geological interpretation and evidential boundary
The internship panel compares the core-defined A1 interval across three boreholes with its wireline character. Here the diagnostic target is the coal-top boundary: the upward change into a finer, generally higher-gamma roof is more important than the shape of the coal trace in isolation. The low-gamma, broadly boxcar-to-cylindrical response is compatible with a laterally recognisable low-clastic interval, while short excursions can be checked directly against the recorded partings. Density is plotted here in counts per second; without the tool transform and calibration it is not a conventional bulk-density scale. Accordingly, curve shape is used to transfer a core-defined marker, not to name an environment: hole condition, bed thickness, mineral matter and depth registration can all modify the motif. The thesis reuses this panel within a broader synthesis; it is not independent log control.
- Source
- Private internship source vault · Chapter IV record
- Location in source
- 4.5.6 Seam A1
- Image quality
- Source scan
- Record ID
- internship-4-u43
