Institut Francais Du Pe'trole

Ifp Energies Nouvelles

Isabelle Kowalewski

Bruno Garcia

Violaine Lamoureux-Var

Daniel Pillot

Christian März

Thomas Wagner

Anabel Aboussou

Emmanuel Behar

Brigitte Doligez

Alain-Yves Huc

V&eacute;ronique Ruffier-Meray

Herman Ravelojaona

Pierre Albrecht

Nicolas Rouquette

Anne Fafet

Philippe Schaeffer

James Oliver Buckman

Guillaume Guehenneux

David Sebag

Christian MÄRZ

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 COand the SOreleased 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 COreleased 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 SOduring the heating sequence in an oxidizing atmosphere.

Process for quantifying the pyritic sulfur and the organic sulfur of a rock sample

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. SOis 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 SOis 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.

Method for quantifying the pyritic sulfur and the organic sulfur of a rock sample

A method for evaluating the acidity of oil samples in small amounts, applicable at any stage of the petroleum industry, includes labelling by an isotope of a chemical element present in at least one acid function present in petroleum samples. Isotopic enrichment of the samples is then determined by isotope ratio mass spectrometry (IRMS). The acidity of the samples is deduced therefrom. This method is an alternative to the measurement of the Total Acid Number (TAN). In particular, it represents the only possibility to reliably measure the acidity of oil samples available in small amounts. The method can be applied to the economic evaluation of a hydrocarbon production field, to the determination of the carbon range responsible for the acidity of a crude, or to monitoring of the evolution of the acid distribution of a site polluted by hydrocarbons.

Method for evaluating the acidity of oil samples by isotopic labelling

Method of predicting paraffin deposition risks during hydrocarbon production and/or transport, applicable at an early reservoir characterization and production stage. It comprises forming a database characterizing the hydrocarbons in the formation, including density data acquired by well logging and data obtained by analysis of rock samples taken from the reservoir formation, an analytical representation of the hydrocarbons by a limited number of pseudo-components comprising each certain hydrocarbon classes with a definition of their respective mass fractions and application of data of said base to a thermodynamic model for determining one or more parameters indicative of the crystallization conditions such as, for example, the starting crystallization temperature, the solid fraction that precipitates when the temperatures falls below this starting crystallization temperature, etc. Applications: hydrocarbon production field valuation.

Method of early predicting paraffin deposition risks during production and transport

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Bailly, France

Isabelle Kowalewski