US Patent 11781988 Method to prepare virtual assay using fluorescence spectroscopy

Systems and methods for providing virtual assays of an oil sample such as crude oil based on fluorescence spectroscopy carried out on the oil sample, and the density of the oil sample. The virtual assay provides a full range of information about fractions of the oil sample including naphtha, gas oil, vacuum gas oil, vacuum residue, and other information about the properties of the oil sample. Using the system and method herein, the virtual assay data pertaining to these several fractions of the oil sample and the oil sample itself are obtained without fractionation of the oil sample into the several components.