Gary Allan Feuerbacher

US Patent:

8311744, Nov 13, 2012

Filed:

Apr 21, 2010

Appl. No.:

12/764422

Inventors:

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

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G06F 19/00
G01V 5/00

US Classification:

702 8, 250254

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.

US Patent:

20140197324, Jul 17, 2014

Filed:

Jan 11, 2013

Appl. No.:

13/739448

Inventors:

Freddy E. MENDEZ - Kingwood TX, US
Gary A. FEUERBACHER - Humble TX, US
John M. LONGO - Houston TX, US
Maxim VASILYEV - The Woodlands TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G01T 1/36

US Classification:

250395

Abstract:

Methods, systems and devices for estimating a parameter of interest from a gamma ray spectrum relating to a volume of matter using standard gamma ray spectra from reference samples, wherein there is at least one non-elemental characteristic that is different between the volume and at least one of the reference samples, wherein the non-elemental characteristic difference affects gamma ray interactions. Methods may include deconvolving a gamma ray spectrum obtained from the analysis volume into a plurality of elemental spectral yields, wherein deconvolution includes compensating for effects of the non-elemental characteristic difference. Methods may include using at least one compensation standard spectrum configured to compensate for the effects of the non-elemental characteristic of the at least one of the reference samples.