METHOD AND APPARATUS FOR CHEMOMETRIC ESTIMATIONS OF FLUID DENSITY, VISCOSITY, DIELECTRIC CONSTANT, AND RESISTIVITY FROM MECHANICAL RESONATOR DATA专利检索- .模糊逻辑人工智能神经网络或类似专利检索查询-专利查询网

METHOD AND APPARATUS FOR CHEMOMETRIC ESTIMATIONS OF FLUID DENSITY, VISCOSITY, DIELECTRIC CONSTANT, AND RESISTIVITY FROM MECHANICAL RESONATOR DATA
申请号	EP05725578	申请日	2005-03-15	公开(公告)号	EP1725968A4	公开(公告)日	2012-01-25
申请人	BAKER HUGHES INC;			发明人	DIFOGGIO ROCCO; REITTINGER PETER W;
摘要	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.
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