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:
Oct. 25, 2016
Filed:
Apr. 28, 2009
Douglas E. Miller, Boston, MA (US);
Ahmad Latifzai, Katy, TX (US);
Romain Charles Andre Prioul, Somerville, MA (US);
Bruce A. Mackay, Sugar Land, TX (US);
Oliver C. Mullins, Ridgefield, CT (US);
Andreas Hausot, Tokyo, JP;
Canyun Wang, Tokyo, JP;
Alireza Farahani, Yokohama, JP;
Douglas E. Miller, Boston, MA (US);
Ahmad Latifzai, Katy, TX (US);
Romain Charles Andre Prioul, Somerville, MA (US);
Bruce A. MacKay, Sugar Land, TX (US);
Oliver C. Mullins, Ridgefield, CT (US);
Andreas Hausot, Tokyo, JP;
Canyun Wang, Tokyo, JP;
Alireza Farahani, Yokohama, JP;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
Methods and related systems are described for measuring acoustic signals in a borehole during a fracturing operation. The system includes a downhole toolstring designed and adapted for deployment in a borehole formed within a subterranean rock formation. A downhole rock fracturing tool opens and propagates a fracture in the subterranean rock formation. Dipole and/or quadrupole acoustic sources transmit acoustic energy into the subterranean rock formation. A receiver array measures acoustic energy traveling through the subterranean rock formation before, during and after the fracture induction. Geophones mounted on extendable arms can be used to measure shear wave acoustic energy travelling in the rock formation. The toolstring can be constructed such that the sources and receivers straddle the fracture zone during the fracturing. Alternatively, the sources or the receivers can co-located axially with the fracture zone, or the toolstring can be repositioned following fracturing such that the fracture zone is between the acoustic sources and receivers.