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:
Dec. 26, 2017
Filed:
Jul. 13, 2012
Applicants:
Daniel Finfer, Hertfordshire, GB;
Kjetil Johannessen, Trondheim, NO;
Inventors:
Daniel Finfer, Hertfordshire, GB;
Kjetil Johannessen, Trondheim, NO;
Assignee:
Silixa Ltd., Elstree, Hertfordshire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 47/00 (2012.01); E21B 47/10 (2012.01); E21B 47/12 (2012.01); G01V 1/22 (2006.01); G01H 9/00 (2006.01);
U.S. Cl.
CPC ...
E21B 47/00 (2013.01); E21B 47/101 (2013.01); E21B 47/123 (2013.01); G01H 9/004 (2013.01); G01V 1/226 (2013.01);
Abstract
The invention relates to the use of distributed optical fiber sensors for distributed acoustic sensing, and in particular, modal analysis of distributed acoustic data obtained in-well to monitoring well integrity. By determining one or more acoustic modes corresponding to distributed speed of sound measurements within the wellbore, and analyzing variations in the distributed speed of sound measurement it is possible to derive information relating to a formation and/or fluid in the wellbore.