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System and method for generating micro-seismic events and characterizing properties of a medium with non-linear acoustic interactions

United States Patent

9,223,039
December 29, 2015
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
A method and system includes generating a first coded acoustic signal including pulses each having a modulated signal at a central frequency; and a second coded acoustic signal each pulse of which includes a modulated signal a central frequency of which is a fraction d of the central frequency of the modulated signal for the corresponding pulse in the first plurality of pulses. A receiver detects a third signal generated by a non-linear mixing process in the mixing zone and the signal is processed to extract the third signal to obtain an emulated micro-seismic event signal occurring at the mixing zone; and to characterize properties of the medium or creating a 3D image of the properties of the medium, or both, based on the emulated micro-seismic event 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/ 292,948
20120123684
November 9, 2011
STATEMENT REGARDING GOVERNMENT RIGHTS The United States government has rights in this invention pursuant to Contract No. DE-AC52-06NA25396 between the United States Department of Energy and Los Alamos National Security, LLC for the operation of Los Alamos National Laboratory.