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:
Nov. 10, 1998
Filed:
Oct. 06, 1995
Michael C Mueller, Houston, TX (US);
Leon Thomsen, Houston, TX (US);
Ilya Tsvankin, Lakewood, CO (US);
Amoco Corporation, Chicago, IL (US);
Abstract
A method for measuring and using anisotropy in a coal bed sequence. The method includes the steps of: stripping layers where polarization changes are indicated by applying a static shift to components aligned with the slow shear wave polarization direction and applying one half of the static shift to components neither aligned with the slow shear wave polarization direction nor aligned with the fast shear wave polarization direction; obtaining for a coal bed a measure of the amplitude of the envelope of the fast polarization trace; rotating, by about 45 degrees away from a principal direction, the data set for that coal bed; obtaining a measure of the amplitude of the envelope of at least one of the mixed/mismatched polarization traces of that coal bed; and obtaining the ratio of the amplitude of the envelope of the fast polarization trace to the amplitude of the envelope of one mixed/mismatched polarization trace in that coal bed.