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System and method for investigating sub-surface features of a rock formation with acoustic sources generating conical broadcast signals

United States Patent

9,110,178
August 18, 2015
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
A method of interrogating a formation includes generating a conical acoustic signal, at a first frequency--a second conical acoustic signal at a second frequency each in the between approximately 500 Hz and 500 kHz such that the signals intersect in a desired intersection volume outside the borehole. The method further includes receiving, a difference signal returning to the borehole resulting from a non-linear mixing of the signals in a mixing zone within the intersection volume.
Vu; Cung Khac (Houston, TX), Skelt; Christopher (Houston, TX), Nihei; Kurt (Oakland, CA), Johnson; Paul A. (Santa Fe, NM), Guyer; Robert (Reno, NV), Ten Cate; James A. (Los Alamos, NM), Le Bas; Pierre-Yves (Los Alamos, NM), Larmat; Carene S. (Los Alamos, NM)
LOS ALAMOS NATIONAL SECURITY LLC (Los Alamos, NM), CHEVRON U.S.A. INC. (San Ramon, CA)
13/ 292,935
20120120765
November 9, 2011
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.