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. 01, 2015
Filed:
Jun. 16, 2010
Marian L. Morys, Downingtown, PA (US);
Knizhnik Sergei, Exton, PA (US);
Rebecca C. Jachmann, Downingtown, PA (US);
Robert Epstein, Downingtown, PA (US);
Marian L. Morys, Downingtown, PA (US);
Knizhnik Sergei, Exton, PA (US);
Rebecca C. Jachmann, Downingtown, PA (US);
Robert Epstein, Downingtown, PA (US);
HALLIBURTON ENERGY SERVICES, INC., Houston, TX (US);
Abstract
Various disclosed nuclear magnetic resonance (NMR) logging systems and methods employ an array of antennas to provide increased resolution without sacrificing signal-to-noise ratio. Certain method embodiments include: establishing a static magnetic field (B) with a tool moving along a borehole through a formation; concurrently driving a multiple antenna cells to produce a radio frequency field (B) in said formation; measuring an individual response from each antenna cell as nuclear spins undergo precession in the formation; and determining at least one characteristic relaxation time of the formation based at least in part on the individual response. The individual responses can be associated with positions where the individual responses were measured, and the relaxation time can be determined from a combination of those responses associated with a given position. Certain responses may be excluded due to tool motion that degrades the measured response.