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:
Nov. 13, 2012
Filed:
Apr. 21, 2010
Use of chemically and geologically consistent constraints for obtaining elemental chemistry downhole
Alfred Khisamutdinov, Novosibirsk, RU;
Mikhail Fedorin, Novosibirsk, RU;
Richard Pemper, Sugar Land, TX (US);
Xiaogang Han, Tomball, TX (US);
Gary A. Feuerbacher, Humble, TX (US);
David Jacobi, Woodlands, TX (US);
Brian J. Lecompte, Tomball, TX (US);
Freddy E. Mendez, Kingwood, TX (US);
John M. Longo, Houston, TX (US);
Alfred Khisamutdinov, Novosibirsk, RU;
Mikhail Fedorin, Novosibirsk, RU;
Richard Pemper, Sugar Land, TX (US);
Xiaogang Han, Tomball, TX (US);
Gary A. Feuerbacher, Humble, TX (US);
David Jacobi, Woodlands, TX (US);
Brian J. LeCompte, Tomball, TX (US);
Freddy E. Mendez, Kingwood, TX (US);
John M. Longo, Houston, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
A method for estimating a lithotype of an earth formation, the method includes: obtaining at least two different energy spectra of radiation received from the earth formation using the logging tool, each energy spectrum having at least one of a natural gamma-ray spectrum, a fast neutron-induced inelastic spectrum, and a thermal neutron induced capture spectrum; establishing at least one geochemically-based constraint related to elemental spectral yields to be determined; determining the elemental spectral yields from the at least two different energy spectra by decomposing the at least two different energy spectra over weighted sum of monoelemental standards wherein at least one weight is constrained by the at least one geochemically-based constraint and each weight represents a proportion of one monoelemental standard; converting the elemental spectral yields to elemental concentrations; and using a classifier to receive the elemental concentrations as input and to provide a lithotype as output.