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:
Apr. 11, 2006
Filed:
Dec. 23, 2002
Toshifumi Matsuoka, Osaka, JP;
Takeshi Endo, Sagamihara, JP;
Di Cao, Yokohama, JP;
Nicholas Banchet, Paris, FR;
Jongha Lee, Kyoto, JP;
Toshifumi Matsuoka, Osaka, JP;
Takeshi Endo, Sagamihara, JP;
Di Cao, Yokohama, JP;
Nicholas Banchet, Paris, FR;
Jongha Lee, Kyoto, JP;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A method and apparatus for determining formation slowness around a borehole are provided. The Fresnel volume concept is applied for traveltime tomography. The Fresnel volume represents a sonic wave propagation path about the borehole. The application of Fresnel volume to sonic data provides for a stable inversion and makes practical 3-D tomography. Inversion is accomplished by an iterative back-projection method.