Method for constructing a kinetic model allowing the mass of hydrogen sulfide produced by aquathermolysis to be estimated
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United States of America Patent
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May 3, 2007
app pub date -
Oct 27, 2006
filing date -
Oct 27, 2005
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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.
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