Patent ID: 6275775
Filing Date: 2001-08-14
Classification: E21B,G01N,Y10T

Abstract:
A method for determining at least one of the following physico-chemical properties of a petroleum fraction:density;the refraction index;the elementary composition of the distillation profile;the simulated distillation curve of the product (%(m/m)=f(T.degree. C.));a cold property;data relating to the concentrations of different radicals and their distribution as a function of the boiling point of the product;the aniline point;the smoke point;the percentage % (m/m) of aromatic carbon Ca;the percentage % (m/m) of paraffinic carbon Cp;the percentage % (m/m) of naphthenic carbon Cn;the cetane number; which comprises:a) carrying out at least one conventional analysis of a set of reference petroleum samples to determine a first set of data of a calculation matrix for developing a correlative model;b) analyzing each reference petroleum sample by chromatography, coupled to at least one detector under suitable conditions, to determine the distribution of at least one element selected from carbon, hydrogen, sulfur, and nitrogen as a function of the boiling points of the components of the sample, and determine a second set of data of the calculation matrix;c) determine different coefficients of the correlative model from the first and second sets of data according to a multivaried method of analysis;d) conducting chromatographic analysis of said petroleum fraction under the same conditions as those of step (b) to determine the distribution of at least one element of the carbon, hydrogen, sulfur, and nitrogen group as a function of the boiling points, to determine a third set of data relating to the petroleum fraction;e) multiplying the third set of data of step (d) by the different coefficients of the correlative model; andf) determining the physico-chemical property that is derived from the petroleum fraction as a function of the boiling points of its components.