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Device and method for imaging of non-linear and linear properties of formations surrounding a borehole

United States Patent

October 8, 2013
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
In some aspects of the disclosure, a method and an apparatus is disclosed for investigating material surrounding the borehole. The method includes generating within a borehole an intermittent low frequency vibration that propagates as a tube wave longitudinally to the borehole and induces a nonlinear response in one or more features in the material that are substantially perpendicular to a longitudinal axis of the borehole; generating within the borehole a sequence of high frequency pulses directed such that they travel longitudinally to the borehole within the surrounding material; and receiving, at one or more receivers positionable in the borehole, a signal that includes components from the low frequency vibration and the sequence of high frequency pulses during intermittent generation of the low frequency vibration, to investigate the material surrounding the borehole.
Johnson; Paul A. (Santa Fe, NM), Tencate; James A. (Los Alamos, NM), Le Bas; Pierre-Yves (Los Alamos, NM), Guyer; Robert (Reno, NV), Vu; Cung Khac (Houston, TX), Skelt; Christopher (Houston, TX)
Chevron U.S.A. Inc. (San Ramon, CA)
12/ 893,573
September 29, 2010
GOVERNMENT RIGHTS This invention was made with Government support under Cooperative Research and Development Agreement (CRADA) Contract Number DE-AC52-06NA25396 awarded by the United States Department of Energy. The Government may have certain rights in this invention.