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Table 8 Applicability conditions defined for the eight new gas geothermometers developed

From: GaS_GeoT: A computer program for an effective use of newly improved gas geothermometers in predicting reliable geothermal reservoir temperatures

New gas geothermometers (GasGi)

Gas concentrations (mmol/mol dry-basis)

Bottom-hole temperature °C

CO2

H2S

CH4

H2

BHTm

Concentration intervals [Min, Max]

[Min, Max]

GasG1, GasG2, GasG6, and GasG8

[311, 3206]

[0.1032, 357]

[0.000059, 57]

[0.1084, 477]

[170, 374]

GasG3, GasG4, GasG5 and GasG7

[699, 994]

[0.1032, 197]

[0.000059, 57]

[0.1084, 128]

[170, 374]

 

Input variable 1

Input variable 2

Input variable 3

Input variable 4

Input variable 5

GasG1

[− 9.17, − 0.21]

[− 16.56, − 2.67]

[− 9.07, 0.43]

–

–

GasG2

[2.67, 16.56]

[− 0.82, 13.95]

[− 2.99, 11.13]

–

–

GasG3

[− 9.17, − 1.39]

[− 16.56, − 2.67]

[− 9.07, − 1.77]

–

–

GasG4

[2.67, 16.56]

[− 0.82, 13.95]

[− 2.99, 11.13]

–

–

GasG5

[1.77, 9.07]

[− 2.90, 6.14]

[− 11.13, 2.99]

–

–

GasG6

[5.74, 8.07]

[− 2.27, 5.88]

[− 9.73, 4.04]

[− 2.22, 6.17]

–

GasG7

[6.55, 6.90]

[− 2.27, 5.28]

[− 9.73, 4.04]

[− 2.22, 4.85]

–

GasG8

[− 9.17, − 0.21]

[− 16.56, − 2.67]

[− 9.07, 0.43]

[− 2.27, 5.88]

[− 2.90, 6.14]

  1. The input variables of each new gas geothermometer are reported in Table 6