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Title:
SPECTRAL IDENTIFICATION OF PROPPANT IN SUBTERRANEAN FRACTURE ZONES
Document Type and Number:
WIPO Patent Application WO/2012/047709
Kind Code:
A3
Abstract:
Proppant placed in a subterranean fracture zone is detected with a spectral identification method in which capture gamma ray spectra are obtained during a logging run carried out with a logging tool having a neutron emitting source and at least one detector sensitive to thermal neutron capture gamma rays. Capture gamma rays from one or more high thermal neutron cross-section materials in the proppant are distinguished from capture gamma rays produced by thermal neutron capture reactions with other downhole formation and borehole constituents utilizing a spectral processing/deconvolution technique. The capture gammas rays from the high thermal neutron capture cross section material in the proppant are used to identify propped fracture zones either alone or in combination with other proppant identification methods which rely on measuring thermal neutron related count rates and/or thermal neutron capture cross-sections from neutron, compensated neutron, and/or pulsed neutron capture logging tools.

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Inventors:
SMITH JR HARRY D (US)
DUENCKEL ROBERT (US)
Application Number:
PCT/US2011/053935
Publication Date:
July 26, 2012
Filing Date:
September 29, 2011
Export Citation:
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Assignee:
CARBO CERAMICS INC (US)
SMITH JR HARRY D (US)
DUENCKEL ROBERT (US)
International Classes:
G01V5/14
Foreign References:
US20090210161A12009-08-20
US7482578B22009-01-27
US20020170348A12002-11-21
US20080116365A12008-05-22
US4939361A1990-07-03
Attorney, Agent or Firm:
BROWN, Randall C. et al. (Suite 700Dallas, Texas, US)
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