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Data acquisition and processing system and method for investigating sub-surface features of a rock formation

United States Patent

January 27, 2015
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
A system and a method includes generating a first signal at a first frequency; and a second signal at a second frequency. Respective sources are positioned within the borehole and controllable such that the signals intersect in an intersection volume outside the borehole. A receiver detects a difference signal returning to the borehole generated by a non-linear mixing process within the intersection volume, and records the detected signal and stores the detected signal in a storage device and records measurement parameters including a position of the first acoustic source, a position of the second acoustic source, a position of the receiver, elevation angle and azimuth angle of the first acoustic signal and elevation angle and azimuth angle of the second acoustic signal.
Vu; Cung Khac (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)
Chevron U.S.A Inc. (San Ramon, CA), Los Alamos National Security, LLC (Los Alamos, NM)
13/ 292,924
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.