The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2002
Filed:
Apr. 19, 2000
Christopher V. Kimball, West Redding, CT (US);
Schlumberger Technology Corporation, Ridgefield, CT (US);
Abstract
A method of determining acoustic properties of borehole earth formations, comprising: (a) transmitting acoustic energy from a transmitter location and receiving acoustic energy (a portion of which traveled through the formations) at a plurality of receiver locations in the borehole; (b) deriving data signals from the received acoustic energy; (c) selecting model values of the acoustic properties; (d) producing an intermediate matrix; (e) performing a singular value decomposition on the intermediate matrix to obtain a basis matrix of eigenvectors; (f) deriving a propagator matrix as a function of the model values; (g) producing a reduced propagator matrix from the propagator and basis matrices; (h) producing a test statistic using the data signals and the reduced propagator matrix; and (i) repeating steps (c)-(h) for different combinations of model values, and selecting, as output acoustic property values, the combination of model values resulting in a maximized test statistic.