Patent ID: 6688176
Filing Date: 2004-02-10
Classification: E21B,G01F,G01H,G01N

Abstract:
A method for using a vibratory resonant densitometer to characterize a fluid, the method comprising:calibrating the densitometer by determining the vibratory resonant frequency of a tubular sample cavity with each of two fluids at single controlled temperature and pressure; wherein each fluid has a different known density; receiving a sample fluid of an unknown density into the tubular sample cavity at a known temperature and pressure; determining a vibratory resonant frequency of the tubular sample cavity; calculating the unknown fluid density using the vibratory resonant frequency and compensating for the known temperature and pressure conditions of the sample fluid versus the controlled temperature and pressure conditions at which the tubular sample cavity was calibrated; wherein the compensating is dependent on the geometry and composition of the sample cavity.