Page 120 - Machine Learning for Subsurface Characterization

96 Machine learning for subsurface characterization

Appendix B Categorization of depths using flags (categorical
features)

See Figs. 3.B1 and 3.B2 and Table 3.B1.

FIG. 3.B1 Qualitative schematic descriptions of the Flags 1–5. Flag 1 has integer values ranging
from 1 to 7; Flags 2, 4, and 5 have integer values of either 0 or 1; and Flag 3 has integer values
ranging from 1to 1.

FIG. 3.B2 Histograms of NRMSE of ANN-based predictions of the NMR T 2 distributions when
processing the training and testing datasets without flags.