Thermal evolution of source rocks in sedimentary basin by using electron paramagnetic resonance technique

1 Methods and principles Based on the variation of free radicals, thermal evolution of organic matter in source rocks in sedimentary basin can be identified by using electron paramagnetic resonance (EPR) technique. This is based on the changes of free radicals with the evolution of kerogen, which may lead to the changes of EPR spectra. The number of free radicals