Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1996-09-27
1998-05-05
Williams, Hezron E.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
73 6176, 73 6178, G01N 3320
Patent
active
057476730
ABSTRACT:
A containment cell with two chambers (7) in a thermostat-controlled enclosure (3) is used to measure separately, at determined pressure levels, the volumes occupied separately by fluid phases, prior to measuring at the same pressures the volume occupied by the mixture thereof, so as to deduce therefrom the excess volume (v.sup.E) and the density of the mixture. By minimizing an error function (F) that takes account of volume quantities, such as the excess volume (v.sup.E) or the density of the mixture, and of phase equilibrium data of the mixture such as the saturation pressures (Psat), these data being determined from said cell, it is possible to determine with precision the coefficients of the equation of state relating the thermodynamic parameters of the mixture (P, V, T) and thereby to fine down for example reservoir models. The method can be applied for study of petroleum fluids for example.
REFERENCES:
patent: 4395902 (1983-08-01), Espenscheid et al.
patent: 4401575 (1983-08-01), Steward et al.
patent: 4658637 (1987-04-01), Ollivaud et al.
patent: 5243848 (1993-09-01), Cox et al.
patent: 5536474 (1996-07-01), Ungerer et al.
Arnaud Jean-Fabrice
Ungerer Philippe
Elf Aquitaine Production
Institut Francais du Pe'trole
Politzer Jay L.
Williams Hezron E.
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