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:
Feb. 09, 1999
Filed:
Feb. 05, 1997
Michael Frenkel, Houston, TX (US);
Alberto G Mezzatesta, Houston, TX (US);
Kurt-M Strack, Houston, TX (US);
Xiaoming Tang, Houston, TX (US);
Keeva Vozoff, Kirribilli, AU;
Western Atlas International, Inc., Houston, TX (US);
Abstract
A method of joint inversion processing acoustic velocity and electrical resistivity well log data. The method includes generating an initial model of earth formations over an interval of interest. The initial model corresponds to earth formations for which the acoustic velocity and resistivity well log data have been measured. The initial model includes layers each having a geometry, a value of resistivity and a value of acoustic velocity. Acoustic velocity and resistivity data are synthesized based on the initial model. Differences are determined between the synthesized data and the measured data. The initial model is adjusted and the steps of synthesizing the log data and determining the differences are repeated until the differences reach a minimum, thereby generating a final model of the earth formations. The step of adjusting includes determining a coupling relationship between the acoustic velocity and the resistivity for the earth formations, and generating an inverse Jacobian matrix of sensitivity functions of the resistivity and acoustic velocity with respect to the geometry and the coupling relationship.