Abstract: The invention relates to a method of characterizing and of quantifying carbon from a superficial deposit, wherein a sample of the deposit is subjected to heating in an inert atmosphere, the sample residue is subjected to heating in an oxidizing atmosphere, and quantities of HC, CO and CO2 released during heating, from which standard parameters TOC and MinC, and a ratio between mineral carbon and total carbon of the sample are determined, are measured. If the ratio is non-zero, the organic carbon content is equal to the sum of TOC and of a percentage of TOC ranging between 4 and 12%, and the mineral carbon content is equal to MinC minus this percentage of TOC. If the ratio is zero, the mineral carbon content is zero and the organic carbon content is equal to the sum of TOC and MinC.

Abstract: A rock sample is subjected to a heating sequence in an inert atmosphere, the effluents resulting from this heating are oxidized, the hydrocarbon-based compounds, the CO, the CO2 and the SO2 released are measured, and a pyrolysis pyritic sulfur content is deduced therefrom. The residue resulting from the heating in an inert atmosphere is then heated in an oxidizing atmosphere and the CO and the CO2 released are measured. The pyritic sulfur content is determined at least from the pyrolysis pyritic sulfur content and from a parameter which is a function of the hydrogen content and of the oxygen content of the organic matter of the sample. It is also possible to determine the organic sulfur content from the pyritic sulfur content and from a measurement of the SO2 during the heating sequence in an oxidizing atmosphere.

Abstract: A method which distinctly characterizes and quantifies the pyritic sulfur and the organic sulfur of a sedimentary rock sample. A rock sample is subjected to a heating sequence in an inert atmosphere which produces effluents resulting which are continuously oxidized. SO2 is continuously measured, and a pyrolysis sulfur content and a pyrolysis pyritic sulfur content are deduced therefrom. The residue from heating in an inert atmosphere is then heated in an oxidizing atmosphere. Released SO2 is continuously measured and at least an oxidation sulfur content is deduced therefrom. The pyritic sulfur content is determined from pyrolysis, a weighting function, a second parameter representing the impact of the mineral matrix and a third parameter representing the impact of the organic matrix.

Abstract: A rock sample is subjected to a heating sequence in an inert atmosphere, the effluents resulting from this heating are oxidized, the hydrocarbon-based compounds, the CO, the CO2 and the SO2 released are measured, and a pyrolysis pyritic sulfur content is deduced therefrom. The residue resulting from the heating in an inert atmosphere is then heated in an oxidizing atmosphere and the CO and the CO2 released are measured. The pyritic sulfur content is determined at least from the pyrolysis pyritic sulfur content and from a parameter which is a function of the hydrogen content and of the oxygen content of the organic matter of the sample. It is also possible to determine the organic sulfur content from the pyritic sulfur content and from a measurement of the SO2 during the heating sequence in an oxidizing atmosphere.

Abstract: The invention is a method of assessing at least one petroleum characteristic of a rock sample. Starting from a temperature ranging between 50° C. and 120° C., the temperature of a rock sample is raised to a temperature ranging between 180° C. and 220° C. Temperature (T2) is maintained for a predetermined time duration. The temperature of the sample is increased to a temperature (T3) ranging 330° C. and 370° C. Temperature (T3) is maintained for a predetermined time duration. The temperature of the sample is then raised to a temperature (T4) ranging 630° C. and 670° C. Three quantities Sh0, Sh1 and Sh2, representative of the amount of hydrocarbon compounds released during the temperature change stages, are measured and at least one petroleum characteristic of the sample is deduced from these quantities.

Abstract: Method for distinctly characterizing and quantifying the pyritic sulfur and the organic sulfur of a sedimentary rock sample. A rock sample is subjected to a heating sequence in an inert atmosphere, the effluents resulting from this heating in an inert atmosphere are continuously oxidized, the SO2 released is continuously measured, and a pyrolysis sulfur content and a pyrolysis pyritic sulfur content are deduced therefrom. The residue from heating in an inert atmosphere is then heated in an oxidizing atmosphere, the SO2 released is continuously measured and at least an oxidation sulfur content is deduced therefrom. The pyritic sulfur content is determined from the pyrolysis pyritic sulfur content and from a weighting function taking account of a first parameter representing a pyrite thermal degradation rate, a second parameter representing the impact of the mineral matrix and a third parameter representing the impact of the organic matrix.

Abstract: The invention is a method of assessing at least one petroleum characteristic of a rock sample. Starting from a temperature ranging between 50° C. and 120° C., the temperature of a rock sample is raised to a temperature ranging between 180° C. and 220° C. which is maintained for a predetermined time duration. The temperature of the sample is increased to a temperature ranging between 330° C. and 370° C. which is maintained for a predetermined time duration. The temperature of the sample is then raised to a temperature ranging between 630° C. and 670° C. Three quantities representative of the amount of hydrocarbon compounds released during the temperature change stages are measured and at least one petroleum characteristic of the sample is deduced from these quantities.

Abstract: The invention is a method of assessing at least one petroleum characteristic of a rock sample. Starting from a temperature ranging between 50° C. and 120° C., the temperature of a rock sample is raised to a temperature ranging between 180° C. and 220° C. which is maintained for a predetermined time duration. The temperature of the sample is increased to a temperature ranging between 330° C. and 370° C. which is maintained for a predetermined time duration. The temperature of the sample is then raised to a temperature ranging between 630° C. and 670° C. Three quantities representative of the amount of hydrocarbon compounds released during the temperature change stages are measured and at least one petroleum characteristic of the sample is deduced from these quantities.

Abstract: The invention is a method for determining an amount of hydrogen sulfide produced by aquathermolysis induced by a thermal process, such as steam injection. The hydrocarbons are described with a compositional representation using H2S and the fractions saturated compounds, aromatics, resins and asphaltenes. A kinetic model is constructed based on the compositional representation using an elementary model obtained by mass balance for sulfur distributed within the fractions. A thermodynamic model is constructed based on the same compositional representation. The amount of produced H2S is determined by performing a compositional reservoir simulation using a compositional and reactive thermal simulator using the kinetic and thermodynamic models.

Abstract: The present invention relates to a method of estimating, for a petroleum feedstock, values representative of the sulfur and carbon distributions in atmospheric and vacuum distillation residues, and a value representative of the sulfur content in coke. According to the method, the following stages are carried out: from a feedstock sample, measuring at least the Rock-Eval parameters S2b, SulfS2b, RC, Sulfoxy using a Rock-Eval device comprising a sulfur measurement module, deducing from the measurements of these Rock-Eval parameters the values of the sulfur and carbon distributions (SPHF, SCOKE, CPHF, CCOKE) in the distillation residues, and a sulfur content in relation to the carbon content in the coke.

Abstract: The invention is a Method of assessing at least one petroleum characteristic of a rock sample. Starting from a temperature ranging between 50° C. and 120° C., the temperature of a rock sample is raised to a temperature ranging between 180° C. and 220° C. which is maintained for a predetermined time duration. The temperature of the sample is increased to a temperature ranging between 330° C. and 370° C. which is maintained for a predetermined time duration. The temperature of the sample is then raised to a temperature ranging between 630° C. and 670° C. Three quantities representative of the amount of hydrocarbon compounds released during the temperature change stages are measured and at least one petroleum characteristic of the sample is deduced from these quantities.

Abstract: The present invention relates to a method of estimating, for a petroleum feedstock, values representative of the sulfur and carbon distributions in atmospheric and vacuum distillation residues, and a value representative of the sulfur content in coke. According to the method, the following stages are carried out: from a feedstock sample, measuring at least the Rock-Eval parameters S2b, SulfS2b, RC, Sulfoxy using a Rock-Eval device comprising a sulfur measurement module, deducing from the measurements of these Rock-Eval parameters the values of the sulfur and carbon distributions (SPHF, SCOKE, CPHF, CCOKE) in the distillation residues, and a sulfur content in relation to the carbon content in the coke.

Abstract: Method for determining an amount of hydrogen sulfide produced by a phenomenon of aquathermolysis induced by a thermal process, such as steam injection. The hydrocarbons are described by means of a compositional representation using H2S and four fractions: saturated compounds, aromatics, resins and asphaltenes. Then a kinetic model is constructed on the basis of the compositional representation, starting from an elementary model obtained by mass balance for the element sulfur distributed within the fractions. Next, a thermodynamic model is constructed on the basis of the same compositional representation. Finally, the amount of hydrogen sulfide (H2S) produced is determined by performing a compositional reservoir simulation by means of a compositional and reactive thermal simulator, with the simulator employing the kinetic model and the thermodynamic model.

Abstract: The invention relates to a method and to a device for sulfur characterization and quantification in a sample of sedimentary rocks or of petroleum products wherein the following stages are carried out: heating said sample in a pyrolysis oven (1) in a non-oxidizing atmosphere, oxidizing part of the pyrolysis effluents and continuously measuring the amount of SO2 generated by said part after oxidation, then transferring the pyrolysis residue of said sample into an oxidation oven (1?) and continuously measuring the amount of SO2 contained in the effluents resulting from said oxidation heating.

Abstract: The invention relates to a method and to a device for sulfur characterization and quantification in a sample of sedimentary rocks or of petroleum products wherein the following stages are carried out: heating said sample in a pyrolysis oven (1) in a non-oxidizing atmosphere, oxidizing part of the pyrolysis effluents and continuously measuring the amount of SO2 generated by said part after oxidation, then transferring the pyrolysis residue of said sample into an oxidation oven (1?) and continuously measuring the amount of SO2 contained in the effluents resulting from said oxidation heating.

Abstract: Method for constructing a kinetic model allowing the mass of hydrogen sulfide produced by aquathermolysis within a rock containing crude oil to be estimated. The crude oil and the rock are described according to four chemical compound fractions: NSO fraction, aromatics fraction, resin fraction and insolubles fraction. A kinetic model describing the mass of hydrogen sulfide produced as a function of time, of temperature and of the evolution of the sulfur mass distribution in said fractions is then defined. In this kinetic model, the sulfur contained in the NSO and resin fractions generates hydrogen sulfide and is partly incorporated in the insolubles and aromatics fractions. The kinetic parameters of the model are then calibrated from aqueous pyrolysis experiments carried out in an inert and closed medium, while checking that all of the sulfur initially contained in the oil is entirely dispersed in all the fractions.