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Table 1 Statistical summary of important parameters after outlier removal

From: Exploratory analysis of machine learning methods in predicting subsurface temperature and geothermal gradient of Northeastern United States

  Surface temperature Depth Corrected BHT Heat flow
Unit °C m °C mW/m2
Mean 12.4 1154 37 49
std 1.8 459 13.2 13.4
min 8.8 43 10.2 0.2
25% 10.6 868 28.9 41.57
50% 12.1 1129 34.5 47.91
75% 14.3 1358 42.8 55.26
max 15.6 6541 146.9 130.21
Variable number Name Unit Source Description Type
1 BHTCorr °C Well log report Corrected bottom-hole temperature Label
2 LatDegree Well log report Lat degree of the well's location Feature
3 LongDegree Well log report Long degree of the well's location Feature
4 MeasureDepth M Well log report The depth where BHT is recorded Feature
5 SurfTemp °C Annual average temperature Surf temperature at the well's location Feature
6 to 55 KH W/(°K) Approximated from the data reported in Correlation of Stratigraphic Units of North America (COSUNA) Multiplication product of each geological layer's thickness with its corresponding thermal conductivity Feature