US 9,810,057 B2
Hybrid transponder system for long-range sensing and 3D localization
Howard Khan Schmidt, Dhahran (SA); and Abdullah Awadh Al-Shehri, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on May 29, 2015, as Appl. No. 14/726,197.
Application 14/726,197 is a continuation of application No. 13/093,979, filed on Apr. 26, 2011, granted, now 9,062,539.
Prior Publication US 2015/0267531 A1, Sep. 24, 2015
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 47/00 (2012.01); E21B 47/12 (2012.01); E21B 43/26 (2006.01)
CPC E21B 47/122 (2013.01) [E21B 43/26 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system to determine a size, extent, and orientation of a hydraulic fracture of a reservoir, the system comprising:
a plurality of transponders configured to be carried by a fluid into a hydraulic fracture of a reservoir to deploy the plurality of transponders within the reservoir, each transponder of the plurality of transponders comprising a substrate carrying:
a radiofrequency (RF) receiver antenna configured to receive RF signals,
a digital control circuit, and
an acoustic transmitter configured to transmit an acoustic return signal, the acoustic transmitter including a thermo-acoustic device configured to be activated by the digital control circuit to heat an environmental fluid in contact with the transponder while the transponder is deployed within the reservoir to generate a pressure wave defining the acoustic return signal; and
a reader dimensioned to be deployed within a wellbore, the reader comprising:
an RF antenna assembly including an RF antenna,
an RF transmitter operably coupled to the RF antenna and configured to transmit an RF signal to each transponder of the plurality of transponders deployed within the reservoir, and
an acoustic receiver configured to receive acoustic return signals from the plurality of transponders deployed within the reservoir, the acoustic return signals comprising the pressure waves generated as a result of the heating of the environmental fluid in contact with the plurality of transponders and the acoustic return signals configured to be processed to determine characteristics of the hydraulic fracture.