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Table 3 Temperature and time intervals for calculating the time-temperature index

From: Real-time drilling mud gas monitoring for qualitative evaluation of hydrocarbon gas composition during deep sea drilling in the Nankai Trough Kumano Basin

Temp. interval (°C) r n δt (Ma) Interval TTI Total TTI
0 - 10 2−10 0.53 0.0005 0.0005
10 - 20 2−9 0.76 0.0015 0.0020
20 - 30 2−8 0.76 0.0030 0.0050
30 - 40 2−7 0.76 0.0059 0.0109
40 - 50 2−6 0.76 0.0119 0.0228
50 - 60 2−5 0.76 0.0237 0.0465
60 - 70 2−4 0.76 0.0475 0.0940
70 - 80 2−3 0.76 0.0949 0.1889
80 - 82 2−2 0.15 0.0380 0.2269
  1. Overview of the different temperature and time intervals for which a time-temperature index (TTI) was calculated. “Interval TTI” denotes the TTI for an individual temperature interval, whereas “cumulative TTI” is the sum of the interval TTIs. See text for explanations.