Analyzer system and method for multivariate characterization of properties in crude and heavy hydrocarbon oils

摘要

A method and apparatus is provided for off-line concentration determination of components liquid hydrocarbon mixtures such as crude or heavy oil. A sampling unit (112) continuously delivers a sample volume to a fluid flow path while a temperature control module (114) maintains the sample at a predetermined setpoint temperature. A homogenization module (116) helps prevent sample stratification while a flow control module (118) maintain a constant sample flow rate. A spectrometer (124) is communicably coupled to an optical transmission cell (120) to transmit and receive radiation. The transmission cell includes collection optics to capture and aggregate non-collimated radiation emerging from the cell, for transmission to the spectrometer. The spectrometer measures sample spectra at a predetermined rate of flow of the sample volume through the transmission cell. A processor (130) is configured to capture and use the spectra in combination with a model of spectra for the hydrocarbon mixture.