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:
Oct. 08, 2013
Filed:
Dec. 27, 2007
Peter T. Wu, Missouri City, TX (US);
Alain Dumont, Kawasaki, JP;
Pierre Campanac, Sugar land, TX (US);
David Linton Johnson, Somerville, MA (US);
Peter T. Wu, Missouri City, TX (US);
Alain Dumont, Kawasaki, JP;
Pierre Campanac, Sugar land, TX (US);
David Linton Johnson, Somerville, MA (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A method for estimating formation permeability from measured sonic wave Stoneley attributes and particularly the Stoneley attributes of slowness (DTst) and attenuation (ATTst), taking into consideration the existence of a heavy walled drill collar at the end of the drill string and the relative lack of borehole mud cake during a drilling operation. In the subject LWD application a real-time qualitative indication for fracture and permeable zones is estimated from Stoneley measurements. This information is useful to a driller to make important timely decisions about drilling and completion programs.