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.

Date of Patent:
Mar. 23, 2021

Filed:

Jan. 31, 2018
Applicant:

Schlumberger Technology Corporation, Sugar Land, TX (US);

Inventors:

Evgeniya Deger, Kanagawa, JP;

Naoki Sakiyama, Tokyo, JP;

Hiroshi Hori, Kanagawa-ken, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V 1/40 (2006.01); G01V 1/44 (2006.01); G01V 1/50 (2006.01); G01V 1/28 (2006.01); G01V 1/30 (2006.01); G01V 1/48 (2006.01);
U.S. Cl.
CPC ...
G01V 1/284 (2013.01); G01V 1/303 (2013.01); G01V 1/48 (2013.01); G01V 1/50 (2013.01); G01V 1/44 (2013.01);
Abstract

Systems and methods for determining a shear wave slowness may include emitting an emitted acoustic wave within a borehole from an acoustic tool. A return acoustic wave may be detected via one or more sensors. The return acoustic wave may be generated when the emitted acoustic wave interacts with a physical feature within the borehole. A signal may be generated that may be indicative of the return acoustic wave. The method may include evaluating the signal via a processor to determine a pseudo-Rayleigh mode slowness and calculating a shear wave slowness using an analytical relationship. The analytical relationship may include a mathematical correlation between the pseudo-Rayleigh mode slowness and the shear wave slowness. The analytical relationship may also include input parameters that are measured physical parameters of borehole properties.


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