System and method for quantitative estimation of thermal maturity of crude oil

A system for optimally determining thermal maturity of a crude oil sample, the system comprising:

• a memory storing instructions;
• a processor executing instructions stored in the memory and configured to:
• measure a 2D emission spectrum of a diluted crude oil sample at a fixed excitation wavelength of 270 nm and determining a fluorescence ratio (I360/I320), wherein the diluted crude oil sample is produced by diluting a sample of crude oil in a non-polar non-fluorescent solvent;
• and
• correlate the fluorescence ratio (I360/I320) to a vitrinite reflectance (% VRc) calculated for quantitatively determining maturity of crude oil, wherein the crude oil with a % VRc 1.25 and 1.20 has higher fluorescence emission intensity at 320 nm (I320) value as compared to oils with % VRc 0.91 and 0.82, and wherein fluorescence emission intensity at 360 nm (I360) value is higher for oils with % VRc 0.91 and 0.82 as compared to oils having % VRc 1.25 and 1.20.