Method to prepare virtual assay using nuclear magnetic resonance spectroscopy

A system for producing a virtual assay of an oil sample, wherein the oil sample is characterized by a density, wherein the oil sample is selected from a group consisting of crude oil, bitumen and shale oil, and wherein the oil sample is characterized by a naphtha fraction, a gas oil fraction, a vacuum gas oil fraction and a vacuum residue fraction, the system comprising:

• a nuclear magnetic resonance (NMR) spectrometer that outputs NMR spectroscopy data;
• a non-volatile memory device that stores calculation modules and data, the data including the NMR spectroscopy data, wherein the NMR spectroscopy data is indicative of aromatic content, and optionally one or both of paraffinic content and naphthenic content, of the oil sample, obtained by NMR spectroscopy of a solution of the oil sample without distillation in an NMR spectroscopy solvent, wherein the aromatic content, and the optionally one or both of the paraffinic content and the naphthenic content, are used as one or more analytical values (AVs);
• a processor coupled to the non-volatile memory device;
• and
• a calculation module that is stored in the non-volatile memory device and that is executed by the processor, wherein the calculation module calculates, as a function of the one or more AVs and the density of the oil sample, virtual assay data of the oil sample and the naphtha fraction, the gas oil fraction, the vacuum gas oil fraction and the vacuum residue fraction, the virtual assay data comprising a plurality of assigned assay data values,
• wherein the virtual assay data is used to evaluate the oil sample without distillation and is used to determine an appropriate refinery or refining unit,
• wherein the virtual assay data comprises:
• the plurality of assigned assay data values pertaining to the oil sample including one or more of the aromatic content, C5-asphaltenes content, elemental composition of sulfur and elemental composition of nitrogen, micro-carbon residue content, total acid number and viscosity;
• the plurality of assigned assay data values pertaining to the vacuum residue fraction of the oil sample including one or more of the elemental composition of sulfur and the micro-carbon residue content;
• the plurality of assigned assay data values pertaining to the vacuum gas oil fraction of the oil sample including one or more of the elemental composition of sulfur and the elemental composition of nitrogen;
• the plurality of assigned assay data values pertaining to the gas oil fraction of the oil sample including one or more of the elemental composition of sulfur and the elemental composition of nitrogen, the viscosity, and indicative properties including aniline point, cetane number, cloud point and pour point;
• and
• the plurality of assigned assay data values pertaining to the naphtha fraction of the oil sample including one or more of the aromatic content, elemental composition of hydrogen and the elemental composition of sulfur, paraffin content and octane number.