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Figure 1

From: Core versus cuttings samples for geochemical and petrophysical analysis of unconventional reservoir rocks

Figure 1

Flame Ionization Detector (FID) pyrograms showing the evolution of hydrocarbon peaks versus temperature at the initial iso-temperature of 150 °C (S1ESH) followed by a ramp heating of 10 °C per minute up to 650 °C. The continuous ramping heat in the extended slow heating (ESH) pyrolysis method6,7 evolves two distinct peaks (S2aESH and S2bESH) separated at approximately 380 °C. This dividing temperature between S2a and S2b may vary depending upon the geochemical composition of the hydrocarbons in the rock. (a) as-received core (ARcore) from the measured depth of 2165.5 m, (b) as-received cuttings (ARcutt) from the measured depth of 2155 m, and (c) solvent-cleaned cuttings (SCcutt) from the same depth of 2155 m.

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