The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 2016
Filed:
Jan. 05, 2010
Henri-pierre Valero, Yokohama, JP;
Sandip Bose, Brookline, MA (US);
Qiuhua Liu, Belmont, MA (US);
Ramachandra Shenoy, Westborough, MA (US);
Abderrhamane Ounadjela, Belmont, MA (US);
Henri-Pierre Valero, Yokohama, JP;
Sandip Bose, Brookline, MA (US);
Qiuhua Liu, Belmont, MA (US);
Ramachandra Shenoy, Westborough, MA (US);
Abderrhamane Ounadjela, Belmont, MA (US);
Schlumberger Technology Corporation, Cambridge, MA (US);
Abstract
Automatic detection and accurate time picking of weak events embedded in strong noise such as microseismicity induced by hydraulic fracturing is accomplished by: a noise reduction step to separate out the noise and estimate its spectrum; an events detection and confidence indicator step, in which a new statistical test is applied to detect which time windows contain coherent arrivals across components and sensors in the multicomponent array and to indicate the confidence in this detection; and a time-picking step to accurately estimate the time of onset of the arrivals detected above and measure the time delay across the array using a hybrid beamforming method incorporating the use of higher order statistics. In the context of hydraulic fracturing, this could enhance the coverage and mapping of the fractures while also enabling monitoring from the treatment well itself where there is usually much higher and spatially correlated noise.