Abstract: The invention relates to a method for analysing hydrocarbons, comprising: the implementation of a gas chromatography separation according to a first controlled temperature profile, to separate a sample into a plurality of analytes; the detection of at least one of said analytes by measurement of a variation of the resonance frequency of at least one resonator of nano-electromechanical system (NEMS) type covered with a functional layer made to vibrate at the resonance frequency thereof, under the effect of an adsorption or desorption of the analyte by the functional layer, said method being characterised in that the resonator is subjected to a second controlled temperature profile, lower than the first profile.

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 CO2 biological capture method comprising the implementation of a photosynthesis reaction by cyanobacteria on the hydrogen carbonate ions of a carbonate system comprising calcium, allowing biomass and calcite (CaCO3) to be produced. The invention allows energy valorization and mineral sequestration of CO2.

Abstract: Method of determining the compositional evolution of fluids present in a porous medium as a result of biodegradation. A biodegradation compositional scheme is defined from twelve chemical classes allowing the hydrocarbons and the gases resulting from biodegradation to be described. The initial amount of each one of these chemical classes contained in the fluids before biodegradation is determined. A reaction scheme is then defined for biodegradation, wherein the chemical classes react with electron acceptors according to parallel reactions having different velocities, and each class reacts with these acceptors according to sequential reactions. The biodegradation reaction velocities are determined for each class. The composition of the fluids is then deduced by assessing the amount of each chemical class by applying the reaction scheme. The composition of the biodegraded hydrocarbons, as well as the amount of acid gas and of methane produced, are notably deduced.

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 of determining the compositional evolution of fluids present in a porous medium as a result of biodegradation. A biodegradation compositional scheme is defined from twelve chemical classes allowing the hydrocarbons and the gases resulting from biodegradation to be described. The initial amount of each one of these chemical classes contained in the fluids before biodegradation is determined. A reaction scheme is then defined for biodegradation, wherein the chemical classes react with electron acceptors according to parallel reactions having different velocities, and each class reacts with these acceptors according to sequential reactions. The biodegradation reaction velocities are determined for each class. The composition of the fluids is then deduced by assessing the amount of each chemical class by applying the reaction scheme. The composition of the biodegraded hydrocarbons, as well as the amount of acid gas and of methane produced, are notably deduced.

Abstract: Computer-implemented method of determining a composition of hydrocarbons present in a sedimentary basin as a result of biodegradation. The displacement rates of the hydrocarbons and the displacement rates of the water present in the porous medium are estimated, from a genesis time in a mother rock to a possible accumulation in a reservoir rock. The biodegradation in the entire porous medium is then modelled as a function of time, from the genesis in the mother rock, considering that the hydrocarbon composition varies proportionally to the displacement rates.