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System and method for investigating sub-surface features and 3D imaging of non-linear property, compressional velocity VP, shear velocity VS and velocity ratio VP/VS of a rock formation

United States Patent

9,046,620
June 2, 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 for generating a three-dimensional image of a rock formation, compressional velocity VP, shear velocity VS and velocity ratio VP/VS of a rock formation are provided. A first acoustic signal includes a first plurality of pulses. A second acoustic signal from a second source includes a second plurality of pulses. A detected signal returning to the borehole includes a signal generated by a non-linear mixing process from the first and second acoustic signals in a non-linear mixing zone within an intersection volume. The received signal is processed to extract the signal over noise and/or signals resulting from linear interaction and the three dimensional image of is generated.
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/ 292,929
20120120764
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.