Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and apparatus for chemometric estimations of fluid density, viscosity, dielectric constant, and resistivity from mechanical resonator data










Image Number 19 for United States Patent #7317989.

The present invention provides a chemometric equation to estimate fluid density, viscosity, dielectric constant and resistivity for a formation fluid sample downhole. The chemometric estimates can be used directly as estimated values for fluid density, viscosity, dielectric constant and resistivity for a formation fluid sample downhole. The chemometric estimates can also be plugged into a Levenberg-Marquardt (LM) non-linear least squares fit, as an initial estimate of the parameter to be estimated by the LM fit. If the initial parameter estimate is too far from the actual parameter values, the LM algorithm may take a long time to converge or even fail to converge entirely. The present invention estimates an initial value of a parameter that provides a high probability that the LM algorithm will converge to a global minimum.








 
 
  Recently Added Patents
Antenna module and wireless communication apparatus
Photoelectric conversion module
Phenethanolamine derivatives for treatment of respiratory diseases
DL control channel structure enhancement
Pharmaceutical and diagnostic compositions for use in the treatment and diagnosis of neurodegenerative diseases or amyloid diseases
Signal generator
Solid-state image pickup element, method of manufacturing the same, and image pickup apparatus including the same
  Randomly Featured Patents
Catalysts for olefin polymerization and a process for preparing olefin polymers therewith
Cuvette
Ion detector
Pharmaceutical preparations
Device for a fuel cell supply
Sample tube rack
Cord reel
Fabric draw down device
Endless wire saw having material recovery capability
Subscription television system