Patent ID: 8112259
Filing Date: 2012-02-07
Classification: C12Q

Abstract:
1. A method of determining a composition of fluids present in a porous medium after biodegradation, characterized in that it comprises: defining a biodegradation compositional scheme from at least the following chemical classes: CO.sub.2, n-saturated H.sub.2S, C.sub.1, C.sub.2-C.sub.4, C.sub.6-C.sub.14 and iso-saturated C.sub.6-C.sub.14, cyclo-saturated C.sub.6-C.sub.14, C.sub.6-C.sub.14 aromatics, n-saturated C.sub.14+, iso-saturated C.sub.14+, cyclo-saturated C.sub.14+, C.sub.14+ aromatics, NSOs, determining an amount of each one of said chemical classes contained in said fluids before biodegradation, defining a biodegradation reaction scheme wherein said chemical classes react with electron acceptors and wherein it is imposed that said classes react simultaneously with a first electron acceptor having the highest oxydoreduction potential, according to different reaction velocities and up to depletion of said first acceptor in the medium, then they react sequentially towards the other electron acceptors according to the same principle, determining said reaction velocities of each one of said chemical classes according to at least:—the potential concentration of the chemical classes in water;—their intrinsic biodegradability;—their reactivity to said electron acceptors;—the temperature of the medium; and—the residence time of said fluids within the medium, and determining the composition of said fluids by assessing an amount for each one of said chemical classes of the compositional scheme by applying the reaction scheme.